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wp-content/plugins/polylang/integrations/wp-importer/wordpress-importer.php

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+<?php
+/**
+ * @package Polylang
+ */
+
+/**
+ * Manages the compatibility with WordPress Importer.
+ *
+ * @since 2.8
+ */
+class PLL_WordPress_Importer {
+
+	/**
+	 * Setups filters.
+	 *
+	 * @since 2.8
+	 */
+	public function __construct() {
+		add_action( 'init', array( $this, 'maybe_wordpress_importer' ) );
+		add_filter( 'wp_import_terms', array( $this, 'wp_import_terms' ) );
+	}
+
+	/**
+	 * If WordPress Importer is active, replace the wordpress_importer_init function.
+	 *
+	 * @since 1.2
+	 */
+	public function maybe_wordpress_importer() {
+		if ( defined( 'WP_LOAD_IMPORTERS' ) && class_exists( 'WP_Import' ) ) {
+			remove_action( 'admin_init', 'wordpress_importer_init' );
+			add_action( 'admin_init', array( $this, 'wordpress_importer_init' ) );
+		}
+	}
+
+	/**
+	 * Loads our child class PLL_WP_Import instead of WP_Import.
+	 *
+	 * @since 1.2
+	 */
+	public function wordpress_importer_init() {
+		$class = new ReflectionClass( 'WP_Import' );
+		load_plugin_textdomain( 'wordpress-importer', false, basename( dirname( $class->getFileName() ) ) . '/languages' );
+
+		$GLOBALS['wp_import'] = new PLL_WP_Import();
+		register_importer( 'wordpress', 'WordPress', __( 'Import <strong>posts, pages, comments, custom fields, categories, and tags</strong> from a WordPress export file.', 'polylang' ), array( $GLOBALS['wp_import'], 'dispatch' ) ); // phpcs:ignore WordPress.WP.CapitalPDangit.Misspelled
+	}
+
+	/**
+	 * Sets the flag when importing a language and the file has been exported with Polylang < 1.8.
+	 *
+	 * @since 1.8
+	 *
+	 * @param array $terms An array of arrays containing terms information form the WXR file.
+	 * @return array
+	 */
+	public function wp_import_terms( $terms ) {
+		$languages = include POLYLANG_DIR . '/settings/languages.php';
+
+		foreach ( $terms as $key => $term ) {
+			if ( 'language' === $term['term_taxonomy'] ) {
+				$description = maybe_unserialize( $term['term_description'] );
+				if ( empty( $description['flag_code'] ) && isset( $languages[ $description['locale'] ] ) ) {
+					$description['flag_code'] = $languages[ $description['locale'] ]['flag'];
+					$terms[ $key ]['term_description'] = maybe_serialize( $description );
+				}
+			}
+		}
+		return $terms;
+	}
+}