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wp-content/plugins/webp-express/lib/classes/PluginPageScript.php

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+<?php
+
+namespace WebPExpress;
+
+class PluginPageScript
+{
+    // The hook was registred in AdminInit
+    public static function enqueueScripts() {
+        $ver = '1';             // note: Minimum 1
+        $jsDir = 'js/0.16.0';   // We change dir when it is critical that no-one gets the cached version (there is a plugin that strips version strings out there...)
+
+        if (!function_exists('webp_express_add_inline_script')) {
+            function webp_express_add_inline_script($id, $script, $position) {
+                if (function_exists('wp_add_inline_script')) {
+                    // wp_add_inline_script is available from Wordpress 4.5
+                    wp_add_inline_script($id, $script, $position);
+                } else {
+                    echo '<script>' . $script . '</script>';
+                }
+            }
+        }
+
+        wp_register_script('webpexpress-plugin-page', plugins_url($jsDir . '/plugin-page.js', dirname(dirname(__FILE__))), [], '1.9.0');
+        wp_enqueue_script('webpexpress-plugin-page');
+    }
+}