951 lines
28 KiB
PHP
951 lines
28 KiB
PHP
<?php
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use Duplicator\Libs\Snap\SnapIO;
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/**
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* Recursivly scans a directory and finds all sym-links and unreadable files
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*
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* Standard: PSR-2
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*
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* @link http://www.php-fig.org/psr/psr-2
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*
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* @package Duplicator
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* @subpackage classes/utilities
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* @copyright (c) 2017, Snapcreek LLC
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*
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* @todo Refactor out IO methods into class.io.php file
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*/
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class DUP_Util
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{
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/**
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* Is PHP 5.2.9 or better running
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*/
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public static $on_php_529_plus;
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/**
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* Is PHP 5.3 or better running
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*/
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public static $on_php_53_plus;
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/**
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* Is PHP 5.4 or better running
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*/
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public static $on_php_54_plus;
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/**
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* Is PHP 7 or better running
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*/
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public static $PHP7_plus;
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/**
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* array of ini disable functions
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*
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* @var array
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*/
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private static $iniDisableFuncs = null;
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/**
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* Initialized on load (see end of file)
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*/
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public static function init()
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{
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/** @todo Remove the static init method in favor of always consistent values */
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self::$on_php_529_plus = version_compare(PHP_VERSION, '5.2.9') >= 0;
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self::$on_php_53_plus = version_compare(PHP_VERSION, '5.3.0') >= 0;
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self::$on_php_54_plus = version_compare(PHP_VERSION, '5.4.0') >= 0;
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self::$PHP7_plus = version_compare(PHP_VERSION, '7.0.0', '>=');
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}
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public static function getArchitectureString()
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{
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switch (PHP_INT_SIZE) {
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case 4:
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return esc_html__('32-bit', 'duplicator');
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break;
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case 8:
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return esc_html__('64-bit', 'duplicator');
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break;
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default:
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return esc_html__('Unknown', 'duplicator');
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}
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}
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public static function objectCopy($srcObject, $destObject, $skipMemberArray = null)
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{
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foreach ($srcObject as $member_name => $member_value) {
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if (!is_object($member_value) && (($skipMemberArray == null) || !in_array($member_name, $skipMemberArray))) {
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// Skipping all object members
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$destObject->$member_name = $member_value;
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}
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}
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}
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public static function getWPCoreDirs()
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{
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$wp_core_dirs = array(get_home_path() . 'wp-admin', get_home_path() . 'wp-includes');
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//if wp_content is overrided
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$wp_path = get_home_path() . "wp-content";
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if (get_home_path() . 'wp-content' != WP_CONTENT_DIR) {
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$wp_path = WP_CONTENT_DIR;
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}
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$wp_path = str_replace("\\", "/", $wp_path);
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$wp_core_dirs[] = $wp_path;
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$wp_core_dirs[] = $wp_path . '/plugins';
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$wp_core_dirs[] = $wp_path . '/themes';
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return $wp_core_dirs;
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}
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/**
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* return absolute path for the files that are core directories
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*
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* @return string array
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*/
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public static function getWPCoreFiles()
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{
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$wp_cored_dirs = array(get_home_path() . 'wp-config.php');
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return $wp_cored_dirs;
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}
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/**
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* Groups an array into arrays by a given key, or set of keys, shared between all array members.
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*
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* Based on {@author Jake Zatecky}'s {@link https://github.com/jakezatecky/array_group_by array_group_by()} function.
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* This variant allows $key to be closures.
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*
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* @param array $array The array to have grouping performed on.
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* @param mixed $key,... The key to group or split by. Can be a _string_, an _integer_, a _float_, or a _callable_.
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* - If the key is a callback, it must return a valid key from the array.
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* - If the key is _NULL_, the iterated element is skipped.
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* - string|oink callback ( mixed $item )
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*
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* @return array|null Returns a multidimensional array or `null` if `$key` is invalid.
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*/
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public static function array_group_by(array $array, $key)
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{
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if (!is_string($key) && !is_int($key) && !is_float($key) && !is_callable($key)) {
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trigger_error('array_group_by(): The key should be a string, an integer, or a callback', E_USER_ERROR);
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return null;
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}
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$func = (!is_string($key) && is_callable($key) ? $key : null);
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$_key = $key;
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// Load the new array, splitting by the target key
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$grouped = array();
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foreach ($array as $value) {
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$key = null;
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if (is_callable($func)) {
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$key = call_user_func($func, $value);
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} elseif (is_object($value) && isset($value->{$_key})) {
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$key = $value->{$_key};
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} elseif (isset($value[$_key])) {
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$key = $value[$_key];
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}
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if ($key === null) {
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continue;
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}
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$grouped[$key][] = $value;
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}
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// Recursively build a nested grouping if more parameters are supplied
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// Each grouped array value is grouped according to the next sequential key
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if (func_num_args() > 2) {
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$args = func_get_args();
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foreach ($grouped as $key => $value) {
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$params = array_merge(array($value), array_slice($args, 2, func_num_args()));
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$grouped[$key] = call_user_func_array('DUP_Util::array_group_by', $params);
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}
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}
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return $grouped;
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}
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/**
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* PHP_SAPI for FCGI requires a data flush of at least 256
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* bytes every 40 seconds or else it forces a script halt
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*
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* @return string A series of 256 space characters
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*/
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public static function fcgiFlush()
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{
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echo(str_repeat(' ', 300));
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@flush();
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@ob_flush();
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}
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public static function isWpDebug()
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{
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return defined('WP_DEBUG') && WP_DEBUG;
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}
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/**
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* Returns the last N lines of a file. Equivalent to tail command
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*
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* @param string $filepath The full path to the file to be tailed
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* @param int $lines The number of lines to return with each tail call
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*
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* @return string The last N parts of the file
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*/
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public static function tailFile($filepath, $lines = 2)
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{
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// Open file
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$f = @fopen($filepath, "rb");
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if ($f === false) {
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return false;
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}
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// Sets buffer size
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$buffer = 256;
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// Jump to last character
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fseek($f, -1, SEEK_END);
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// Read it and adjust line number if necessary
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// (Otherwise the result would be wrong if file doesn't end with a blank line)
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if (fread($f, 1) != "\n") {
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$lines -= 1;
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}
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// Start reading
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$output = '';
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$chunk = '';
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// While we would like more
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while (ftell($f) > 0 && $lines >= 0) {
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// Figure out how far back we should jump
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$seek = min(ftell($f), $buffer);
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// Do the jump (backwards, relative to where we are)
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fseek($f, -$seek, SEEK_CUR);
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// Read a chunk and prepend it to our output
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$output = ($chunk = fread($f, $seek)) . $output;
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// Jump back to where we started reading
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fseek($f, -mb_strlen($chunk, '8bit'), SEEK_CUR);
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// Decrease our line counter
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$lines -= substr_count($chunk, "\n");
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}
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// While we have too many lines
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// (Because of buffer size we might have read too many)
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while ($lines++ < 0) {
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// Find first newline and remove all text before that
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$output = substr($output, strpos($output, "\n") + 1);
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}
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fclose($f);
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return trim($output);
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}
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/**
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* Display human readable byte sizes
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*
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* @param int $size The size in bytes
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*
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* @return string The size of bytes readable such as 100KB, 20MB, 1GB etc.
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*/
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public static function byteSize($size, $roundBy = 2)
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{
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try {
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$units = array('B', 'KB', 'MB', 'GB', 'TB');
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for ($i = 0; $size >= 1024 && $i < 4; $i++) {
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$size /= 1024;
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}
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return round($size, $roundBy) . $units[$i];
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} catch (Exception $e) {
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return "n/a";
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}
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}
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/**
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* Makes path safe for any OS
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* Paths should ALWAYS READ be "/"
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* uni: /home/path/file.txt
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* win: D:/home/path/file.txt
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*
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* @param string $path The path to make safe
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*
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* @return string A path with all slashes facing "/"
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*/
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public static function safePath($path)
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{
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return str_replace("\\", "/", $path);
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}
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/**
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* Get current microtime as a float. Method is used for simple profiling
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*
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* @see elapsedTime
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*
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* @return string A float in the form "msec sec", where sec is the number of seconds since the Unix epoch
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*/
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public static function getMicrotime()
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{
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return microtime(true);
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}
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/**
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* Append the value to the string if it doesn't already exist
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*
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* @param string $string The string to append to
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* @param string $value The string to append to the $string
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*
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* @return string Returns the string with the $value appended once
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*/
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public static function appendOnce($string, $value)
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{
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return $string . (substr($string, -1) == $value ? '' : $value);
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}
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/**
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* Return a string with the elapsed time
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*
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* @see getMicrotime()
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*
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* @param mixed number $end The final time in the sequence to measure
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* @param mixed number $start The start time in the sequence to measure
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*
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* @return string The time elapsed from $start to $end
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*/
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public static function elapsedTime($end, $start)
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{
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return sprintf(
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esc_html_x(
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"%.2f sec.",
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"sec. stands for seconds",
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"duplicator"
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),
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abs($end - $start)
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);
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}
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/**
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* List all of the files of a path
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*
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* @param string $path The full path to a system directory
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*
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* @return array of all files in that path
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*
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* Notes:
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* - Avoid using glob() as GLOB_BRACE is not an option on some operating systems
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* - Pre PHP 5.3 DirectoryIterator will crash on unreadable files
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* - Scandir will not crash on unreadable items, but will not return results
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*/
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public static function listFiles($path = '.')
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{
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try {
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$files = array();
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if ($dh = opendir($path)) {
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while (($file = readdir($dh)) !== false) {
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if ($file == '.' || $file == '..') {
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continue;
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}
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$full_file_path = trailingslashit($path) . $file;
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$files[] = str_replace("\\", '/', $full_file_path);
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}
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@closedir($dh);
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}
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return $files;
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} catch (Exception $exc) {
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$result = array();
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$files = @scandir($path);
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if (is_array($files)) {
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foreach ($files as $file) {
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$result[] = str_replace("\\", '/', $path) . $file;
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}
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}
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return $result;
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}
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}
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/**
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* List all of the directories of a path
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*
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* @param string $path The full path to a system directory
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*
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* @return array of all dirs in the $path
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*/
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public static function listDirs($path = '.')
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{
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$dirs = array();
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foreach (new DirectoryIterator($path) as $file) {
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if ($file->isDir() && !$file->isDot()) {
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$dirs[] = DUP_Util::safePath($file->getPathname());
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}
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}
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return $dirs;
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}
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/**
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* Does the directory have content
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*
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* @param string $path The full path to a system directory
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*
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* @return bool Returns true if directory is empty
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*/
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public static function isDirectoryEmpty($path)
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{
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if (!is_readable($path)) {
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return null;
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}
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return (count(scandir($path)) == 2);
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}
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/**
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* Size of the directory recursively in bytes
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*
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* @param string $path The full path to a system directory
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*
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* @return int Returns the size of the directory in bytes
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*/
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public static function getDirectorySize($path)
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{
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if (!file_exists($path)) {
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return 0;
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}
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if (is_file($path)) {
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return filesize($path);
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}
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$size = 0;
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$list = glob($path . "/*");
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if (!empty($list)) {
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foreach ($list as $file) {
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$size += self::getDirectorySize($file);
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}
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}
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return $size;
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}
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/**
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* Can shell_exec be called on this server
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*
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* @return bool Returns true if shell_exec can be called on server
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*/
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public static function hasShellExec()
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{
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$cmds = array('shell_exec', 'escapeshellarg', 'escapeshellcmd', 'extension_loaded');
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//Function disabled at server level
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if (array_intersect($cmds, array_map('trim', explode(',', @ini_get('disable_functions'))))) {
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return apply_filters('duplicator_is_shellzip_available', false);
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}
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//Suhosin: http://www.hardened-php.net/suhosin/
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//Will cause PHP to silently fail
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if (extension_loaded('suhosin')) {
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$suhosin_ini = @ini_get("suhosin.executor.func.blacklist");
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if (array_intersect($cmds, array_map('trim', explode(',', $suhosin_ini)))) {
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return apply_filters('duplicator_is_shellzip_available', false);
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}
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}
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if (! function_exists('shell_exec')) {
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return apply_filters('duplicator_is_shellzip_available', false);
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}
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// Can we issue a simple echo command?
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if (!@shell_exec('echo duplicator')) {
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return apply_filters('duplicator_is_shellzip_available', false);
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}
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return apply_filters('duplicator_is_shellzip_available', true);
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}
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/**
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* Is the server running Windows operating system
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*
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* @return bool Returns true if operating system is Windows
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*/
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public static function isWindows()
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{
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if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
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return true;
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}
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return false;
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}
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/**
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* Wrap to prevent malware scanners from reporting false/positive
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* Switched from our old method to avoid WordFence reporting a false positive
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*
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* @param string $string The string to decrypt i.e. base64_decode
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*
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* @return string Returns the string base64 decoded
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*/
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public static function installerUnscramble($string)
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{
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return base64_decode($string);
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}
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/**
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* Wrap to prevent malware scanners from reporting false/positive
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* Switched from our old method to avoid WordFence reporting a false positive
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*
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* @param string $string The string to decrypt i.e. base64_encode
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*
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* @return string Returns the string base64 encode
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*/
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public static function installerScramble($string)
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{
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return base64_encode($string);
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}
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const SECURE_ISSUE_DIE = 'die';
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const SECURE_ISSUE_THROW = 'throw';
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const SECURE_ISSUE_RETURN = 'return';
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/**
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* Does the current user have the capability
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*
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* @param type $permission
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* @param type $exit // SECURE_ISSUE_DIE die script with die function
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* SECURE_ISSUE_THROW throw an exception if fail
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* SECURE_ISSUE_RETURN return false if fail
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*
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* @return boolean // return false is fail and $exit is SECURE_ISSUE_THROW
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* // true if success
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*
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* @throws Exception // thow exception if $exit is SECURE_ISSUE_THROW
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*/
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public static function hasCapability($permission = 'read', $exit = self::SECURE_ISSUE_DIE)
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{
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$capability = apply_filters('wpfront_user_role_editor_duplicator_translate_capability', $permission);
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if (!current_user_can($capability)) {
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$exitMsg = __('You do not have sufficient permissions to access this page.', 'duplicator');
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DUP_LOG::Trace('You do not have sufficient permissions to access this page. PERMISSION: ' . $permission);
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switch ($exit) {
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case self::SECURE_ISSUE_THROW:
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throw new Exception($exitMsg);
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case self::SECURE_ISSUE_RETURN:
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return false;
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case self::SECURE_ISSUE_DIE:
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default:
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wp_die($exitMsg);
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}
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}
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return true;
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}
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/**
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* Gets the name of the owner of the current PHP script
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*
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* @return string The name of the owner of the current PHP script
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*/
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public static function getCurrentUser()
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{
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$unreadable = 'Undetectable';
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if (function_exists('get_current_user') && is_callable('get_current_user')) {
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$user = get_current_user();
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return strlen($user) ? $user : $unreadable;
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}
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return $unreadable;
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}
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/**
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* Gets the owner of the PHP process
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*
|
|
* @return string Gets the owner of the PHP process
|
|
*/
|
|
public static function getProcessOwner()
|
|
{
|
|
$unreadable = 'Undetectable';
|
|
$user = '';
|
|
try {
|
|
if (function_exists('exec')) {
|
|
$user = @exec('whoami');
|
|
}
|
|
|
|
if (!strlen($user) && function_exists('posix_getpwuid') && function_exists('posix_geteuid')) {
|
|
$user = posix_getpwuid(posix_geteuid());
|
|
$user = $user['name'];
|
|
}
|
|
|
|
return strlen($user) ? $user : $unreadable;
|
|
} catch (Exception $ex) {
|
|
return $unreadable;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates the snapshot directory if it doesn't already exist
|
|
*
|
|
* @return bool
|
|
*/
|
|
public static function initSnapshotDirectory()
|
|
{
|
|
$error = false;
|
|
|
|
$path_wproot = duplicator_get_abs_path();
|
|
$path_ssdir = DUP_Settings::getSsdirPath();
|
|
|
|
if (!file_exists($path_ssdir)) {
|
|
$old_root_perm = @fileperms($path_wproot);
|
|
|
|
//--------------------------------
|
|
//CHMOD DIRECTORY ACCESS
|
|
//wordpress root directory
|
|
SnapIO::chmod($path_wproot, 'u+rwx');
|
|
|
|
//snapshot directory
|
|
if (SnapIO::dirWriteCheckOrMkdir($path_ssdir, 'u+rwx,go+rx') == false) {
|
|
$error = true;
|
|
}
|
|
|
|
// restore original root perms
|
|
SnapIO::chmod($path_wproot, $old_root_perm);
|
|
|
|
if ($error) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
SnapIO::chmod($path_ssdir, 'u+rwx,go+rx');
|
|
SnapIO::dirWriteCheckOrMkdir(DUP_Settings::getSsdirTmpPath(), 'u+rwx');
|
|
SnapIO::createSilenceIndex(DUP_Settings::getSsdirTmpPath());
|
|
|
|
// Logs directory
|
|
SnapIO::dirWriteCheckOrMkdir(DUP_Settings::getSsdirLogsPath(), 'u+rwx');
|
|
SnapIO::createSilenceIndex(DUP_Settings::getSsdirLogsPath());
|
|
|
|
//--------------------------------
|
|
//FILE CREATION & HARDEN PROCESS
|
|
//index.php, .htaccess, robots.txt
|
|
SnapIO::createSilenceIndex(DUP_Settings::getSsdirPath());
|
|
self::setupBackupDirRobotsFile();
|
|
self::setupBackupDirHtaccess();
|
|
self::performHardenProcesses();
|
|
// For old installations
|
|
SnapIO::createSilenceIndex(DUP_Settings::getSsdirInstallerPath());
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Attempts to create a secure .htaccess file in the download directory
|
|
*
|
|
* @return void
|
|
*/
|
|
protected static function setupBackupDirHtaccess()
|
|
{
|
|
try {
|
|
$storageHtaccessOff = DUP_Settings::Get('storage_htaccess_off');
|
|
$fileName = DUP_Settings::getSsdirPath() . '/.htaccess';
|
|
|
|
if ($storageHtaccessOff) {
|
|
@unlink($fileName);
|
|
} elseif (!file_exists($fileName)) {
|
|
$fileContent = <<<HTACCESS
|
|
# Duplicator config, In case of file downloading problem, you can disable/enable it at Duplicator > Settings > Storage > Apache .htaccess
|
|
|
|
Options -Indexes
|
|
<Files *.php>
|
|
deny from all
|
|
</Files>
|
|
<IfModule mod_headers.c>
|
|
<FilesMatch "\.(daf)$">
|
|
ForceType application/octet-stream
|
|
Header set Content-Disposition attachment
|
|
</FilesMatch>
|
|
</IfModule>
|
|
HTACCESS;
|
|
if (file_put_contents($fileName, $fileContent) === false) {
|
|
throw new Exception('Can\'t create .haccess');
|
|
}
|
|
}
|
|
} catch (Exception $ex) {
|
|
DUP_Log::Trace("Unable create file htaccess {$fileName} msg:" . $ex->getMessage());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Attempts to create a robots.txt file in the backups directory
|
|
* to prevent search engines
|
|
*
|
|
* @return void
|
|
*/
|
|
protected static function setupBackupDirRobotsFile()
|
|
{
|
|
try {
|
|
$fileName = DUP_Settings::getSsdirPath() . '/robots.txt';
|
|
if (!file_exists($fileName)) {
|
|
$fileContent = <<<HTACCESS
|
|
User-agent: *
|
|
Disallow: /
|
|
HTACCESS;
|
|
if (file_put_contents($fileName, $fileContent) === false) {
|
|
throw new Exception('Can\'t create .haccess');
|
|
}
|
|
}
|
|
} catch (Exception $ex) {
|
|
DUP_Log::Trace("Unable create robots.txt {$fileName} msg:" . $ex->getMessage());
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Run various secure processes to harden the backups dir
|
|
*
|
|
* @return void
|
|
*/
|
|
public static function performHardenProcesses()
|
|
{
|
|
$backupsDir = DUP_Settings::getSsdirPath();
|
|
|
|
//Edge Case: Remove any main.installer.php files
|
|
$dupInstallFile = "{$backupsDir}/dup-installer/main.installer.php";
|
|
if (file_exists($dupInstallFile)) {
|
|
SnapIO::chmod($dupInstallFile, "a+w");
|
|
SnapIO::unlink("{$dupInstallFile}");
|
|
}
|
|
|
|
//Rename installer php files to .bak
|
|
SnapIO::regexGlobCallback(
|
|
$backupsDir,
|
|
function ($path) {
|
|
$parts = pathinfo($path);
|
|
$newPath = $parts['dirname'] . '/' . $parts['filename'] . DUP_Installer::INSTALLER_SERVER_EXTENSION;
|
|
SnapIO::rename($path, $newPath);
|
|
},
|
|
array(
|
|
'regexFile' => '/^.+_installer.*\.php$/',
|
|
'regexFolder' => false,
|
|
'recursive' => true,
|
|
)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Attempts to get the file zip path on a users system
|
|
*
|
|
* @return null
|
|
*/
|
|
public static function getZipPath()
|
|
{
|
|
$filepath = null;
|
|
|
|
if (self::hasShellExec()) {
|
|
if (shell_exec('hash zip 2>&1') == null) {
|
|
$filepath = 'zip';
|
|
} else {
|
|
$possible_paths = array(
|
|
'/usr/bin/zip',
|
|
'/opt/local/bin/zip'
|
|
//'C:/Program\ Files\ (x86)/GnuWin32/bin/zip.exe');
|
|
);
|
|
|
|
foreach ($possible_paths as $path) {
|
|
if (@file_exists($path)) {
|
|
$filepath = $path;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return $filepath;
|
|
}
|
|
|
|
/**
|
|
* Is the server PHP 5.3 or better
|
|
*
|
|
* @return bool Returns true if the server PHP 5.3 or better
|
|
*/
|
|
public static function PHP53()
|
|
{
|
|
return version_compare(PHP_VERSION, '5.3.2', '>=');
|
|
}
|
|
|
|
/**
|
|
* Returns an array of the WordPress core tables.
|
|
*
|
|
* @return array Returns all WP core tables
|
|
*/
|
|
public static function getWPCoreTables()
|
|
{
|
|
global $wpdb;
|
|
$result = array();
|
|
foreach (self::getWPCoreTablesEnd() as $tend) {
|
|
$result[] = $wpdb->prefix . $tend;
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
public static function getWPCoreTablesEnd()
|
|
{
|
|
return array(
|
|
'commentmeta',
|
|
'comments',
|
|
'links',
|
|
'options',
|
|
'postmeta',
|
|
'posts',
|
|
'term_relationships',
|
|
'term_taxonomy',
|
|
'termmeta',
|
|
'terms',
|
|
'usermeta',
|
|
'blogs',
|
|
'blog_versions',
|
|
'blogmeta',
|
|
'users',
|
|
'site',
|
|
'sitemeta',
|
|
'signups',
|
|
'registration_log',
|
|
'blog_versions');
|
|
}
|
|
|
|
public static function isWPCoreTable($table)
|
|
{
|
|
global $wpdb;
|
|
|
|
if (strpos($table, $wpdb->prefix) !== 0) {
|
|
return false;
|
|
}
|
|
|
|
$subTName = substr($table, strlen($wpdb->prefix));
|
|
$coreEnds = self::getWPCoreTablesEnd();
|
|
|
|
if (in_array($subTName, $coreEnds)) {
|
|
return true;
|
|
} elseif (is_multisite()) {
|
|
$exTable = explode('_', $subTName);
|
|
if (count($exTable) >= 2 && is_numeric($exTable[0])) {
|
|
$tChekc = implode('_', array_slice($exTable, 1));
|
|
if (get_blog_details((int) $exTable[0], false) !== false && in_array($tChekc, $coreEnds)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
public static function getWPBlogIdTable($table)
|
|
{
|
|
global $wpdb;
|
|
|
|
if (!is_multisite() || strpos($table, $wpdb->prefix) !== 0) {
|
|
return 0;
|
|
}
|
|
|
|
$subTName = substr($table, strlen($wpdb->prefix));
|
|
$exTable = explode('_', $subTName);
|
|
if (count($exTable) >= 2 && is_numeric($exTable[0]) && get_blog_details((int) $exTable[0], false) !== false) {
|
|
return (int) $exTable[0];
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check given table is exist in real
|
|
*
|
|
* @param $table string Table name
|
|
*
|
|
* @return bool
|
|
*/
|
|
public static function isTableExists($table)
|
|
{
|
|
global $wpdb;
|
|
// It will clear the $GLOBALS['wpdb']->last_error var
|
|
$wpdb->flush();
|
|
$table = esc_sql($table);
|
|
$sql = "SELECT 1 FROM `{$table}` LIMIT 1;";
|
|
|
|
$wpdb->get_var($sql);
|
|
if (empty($wpdb->last_error)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Finds if its a valid executable or not
|
|
*
|
|
* @param string $cmd $exe A non zero length executable path to find if that is executable or not.
|
|
*
|
|
* @return boolean
|
|
*/
|
|
public static function isExecutable($cmd)
|
|
{
|
|
if (strlen($cmd) < 1) {
|
|
return false;
|
|
}
|
|
|
|
if (@is_executable($cmd)) {
|
|
return true;
|
|
}
|
|
|
|
$output = shell_exec($cmd);
|
|
if (!is_null($output)) {
|
|
return true;
|
|
}
|
|
|
|
$output = shell_exec($cmd . ' -?');
|
|
if (!is_null($output)) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Display human readable byte sizes
|
|
*
|
|
* @param string $size The size in bytes
|
|
*
|
|
* @return string Human readable bytes such as 50MB, 1GB
|
|
*/
|
|
public static function readableByteSize($size)
|
|
{
|
|
try {
|
|
$units = array('B', 'KB', 'MB', 'GB', 'TB');
|
|
for ($i = 0; $size >= 1024 && $i < 4; $i++) {
|
|
$size /= 1024;
|
|
}
|
|
return round($size, 2) . $units[$i];
|
|
} catch (Exception $e) {
|
|
return "n/a";
|
|
}
|
|
}
|
|
|
|
public static function getTablePrefix()
|
|
{
|
|
global $wpdb;
|
|
$tablePrefix = (is_multisite() && is_plugin_active_for_network('duplicator/duplicator.php')) ? $wpdb->base_prefix : $wpdb->prefix;
|
|
return $tablePrefix;
|
|
}
|
|
|
|
/**
|
|
* return ini disable functions array
|
|
*
|
|
* @return array
|
|
*/
|
|
public static function getIniDisableFuncs()
|
|
{
|
|
if (is_null(self::$iniDisableFuncs)) {
|
|
$tmpFuncs = ini_get('disable_functions');
|
|
$tmpFuncs = explode(',', $tmpFuncs);
|
|
self::$iniDisableFuncs = array();
|
|
foreach ($tmpFuncs as $cFunc) {
|
|
self::$iniDisableFuncs[] = trim($cFunc);
|
|
}
|
|
}
|
|
|
|
return self::$iniDisableFuncs;
|
|
}
|
|
|
|
/**
|
|
* Check if function exists and isn't in ini disable_functions
|
|
*
|
|
* @param string $function_name
|
|
*
|
|
* @return bool
|
|
*/
|
|
public static function isIniFunctionEnalbe($function_name)
|
|
{
|
|
return function_exists($function_name) && !in_array($function_name, self::getIniDisableFuncs());
|
|
}
|
|
}
|