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Edit File: wp_functions.php
<?php if ( ! function_exists( '_sanitize_text_fields' ) ): /** * Internal helper function to sanitize a string from user input or from the db * * @since 4.7.0 * @access private * * @param string $str String to sanitize. * @param bool $keep_newlines optional Whether to keep newlines. Default: false. * @return string Sanitized string. */ function _sanitize_text_fields( $str, $keep_newlines = false ) { $filtered = wp_check_invalid_utf8( $str ); if ( strpos( $filtered, '<' ) !== false ) { $filtered = wp_pre_kses_less_than( $filtered ); // This will strip extra whitespace for us. $filtered = wp_strip_all_tags( $filtered, false ); // Use html entities in a special case to make sure no later // newline stripping stage could lead to a functional tag $filtered = str_replace( "<\n", "<\n", $filtered ); } if ( ! $keep_newlines ) { $filtered = preg_replace( '/[\r\n\t ]+/', ' ', $filtered ); } $filtered = trim( $filtered ); $found = false; while ( preg_match( '/%[a-f0-9]{2}/i', $filtered, $match ) ) { $filtered = str_replace( $match[0], '', $filtered ); $found = true; } if ( $found ) { // Strip out the whitespace that may now exist after removing the octets. $filtered = trim( preg_replace( '/ +/', ' ', $filtered ) ); } return $filtered; } endif; if ( ! function_exists( 'get_site' ) ): /** * Retrieves site data given a site ID or site object. * * Site data will be cached and returned after being passed through a filter. * If the provided site is empty, the current site global will be used. * * @since 4.6.0 * * @param WP_Site|int|null $site Optional. Site to retrieve. Default is the current site. * @return WP_Site|null The site object or null if not found. */ function get_site( $site = null ) { if ( empty( $site ) ) { $site = get_current_blog_id(); } if ( $site instanceof WP_Site ) { $_site = $site; } elseif ( is_object( $site ) ) { $_site = new WP_Site( $site ); } else { $_site = WP_Site::get_instance( $site ); } if ( ! $_site ) { return null; } /** * Fires after a site is retrieved. * * @since 4.6.0 * * @param WP_Site $_site Site data. */ $_site = apply_filters( 'get_site', $_site ); return $_site; } endif; if ( ! function_exists( 'sanitize_textarea_field' ) ): /** * Sanitizes a multiline string from user input or from the database. * * The function is like sanitize_text_field(), but preserves * new lines (\n) and other whitespace, which are legitimate * input in textarea elements. * * @see sanitize_text_field() * * @since 4.7.0 * * @param string $str String to sanitize. * @return string Sanitized string. */ function sanitize_textarea_field( $str ) { $filtered = _sanitize_text_fields( $str, true ); /** * Filters a sanitized textarea field string. * * @since 4.7.0 * * @param string $filtered The sanitized string. * @param string $str The string prior to being sanitized. */ return apply_filters( 'sanitize_textarea_field', $filtered, $str ); } endif; if ( ! function_exists( 'wp_doing_ajax' ) ): function wp_doing_ajax() { /** * Filters whether the current request is an Ajax request. * * @since 4.7.0 * * @param bool $wp_doing_ajax Whether the current request is an Ajax request. */ return apply_filters( 'wp_doing_ajax', defined( 'DOING_AJAX' ) && DOING_AJAX ); } endif; if ( ! function_exists( 'wp_doing_cron' ) ): function wp_doing_cron() { /** * Filters whether the current request is a WordPress cron request. * * @since 4.8.0 * * @param bool $wp_doing_cron Whether the current request is a WordPress cron request. */ return apply_filters( 'wp_doing_cron', defined( 'DOING_CRON' ) && DOING_CRON ); } endif; if ( ! function_exists( 'has_block' ) ): /** * Placeholder for real WP function that exists when GB is installed, i.e. WP >= 5.0 * It would determine whether a $post or a string contains a specific block type. * * @see has_block() * * @since 4.2 * * @return bool forced false result. */ function has_block() { return false; } endif; if ( ! function_exists( 'wp_get_default_update_php_url' ) ) : /** * Gets the default URL to learn more about updating the PHP version the site is running on. * * Do not use this function to retrieve this URL. Instead, use {@see wp_get_update_php_url()} when relying on the URL. * This function does not allow modifying the returned URL, and is only used to compare the actually used URL with the * default one. * * @since 5.1.0 * @access private * * @return string Default URL to learn more about updating PHP. */ function wp_get_default_update_php_url() { return _x( 'https://wordpress.org/support/update-php/', 'localized PHP upgrade information page' ); } endif; if ( ! function_exists( 'wp_get_update_php_url' ) ) : /** * Gets the URL to learn more about updating the PHP version the site is running on. * * This URL can be overridden by specifying an environment variable `WP_UPDATE_PHP_URL` or by using the * {@see 'wp_update_php_url'} filter. Providing an empty string is not allowed and will result in the * default URL being used. Furthermore the page the URL links to should preferably be localized in the * site language. * * @since 5.1.0 * * @return string URL to learn more about updating PHP. */ function wp_get_update_php_url() { $default_url = wp_get_default_update_php_url(); $update_url = $default_url; if ( false !== getenv( 'WP_UPDATE_PHP_URL' ) ) { $update_url = getenv( 'WP_UPDATE_PHP_URL' ); } /** * Filters the URL to learn more about updating the PHP version the site is running on. * * Providing an empty string is not allowed and will result in the default URL being used. Furthermore * the page the URL links to should preferably be localized in the site language. * * @since 5.1.0 * * @param string $update_url URL to learn more about updating PHP. */ $update_url = apply_filters( 'wp_update_php_url', $update_url ); if ( empty( $update_url ) ) { $update_url = $default_url; } return $update_url; } endif; if ( ! function_exists( 'wp_get_update_php_annotation' ) ) : /** * Returns the default annotation for the web hosting altering the "Update PHP" page URL. * * This function is to be used after {@see wp_get_update_php_url()} to return a consistent * annotation if the web host has altered the default "Update PHP" page URL. * * @since 5.2.0 * * @return string Update PHP page annotation. An empty string if no custom URLs are provided. */ function wp_get_update_php_annotation() { $update_url = wp_get_update_php_url(); $default_url = wp_get_default_update_php_url(); if ( $update_url === $default_url ) { return ''; } $annotation = sprintf( /* translators: %s: Default Update PHP page URL. */ __( 'This resource is provided by your web host, and is specific to your site. For more information, <a href="%s" target="_blank">see the official WordPress documentation</a>.' ), esc_url( $default_url ) ); return $annotation; } endif; if ( ! function_exists( 'wp_update_php_annotation' ) ) : /** * Prints the default annotation for the web host altering the "Update PHP" page URL. * * This function is to be used after {@see wp_get_update_php_url()} to display a consistent * annotation if the web host has altered the default "Update PHP" page URL. * * @since 5.1.0 * @since 5.2.0 Added the `$before` and `$after` parameters. * * @param string $before Markup to output before the annotation. Default `<p class="description">`. * @param string $after Markup to output after the annotation. Default `</p>`. */ function wp_update_php_annotation( $before = '<p class="description">', $after = '</p>' ) { $annotation = wp_get_update_php_annotation(); if ( $annotation ) { echo et_core_intentionally_unescaped( $before . $annotation . $after, 'html' ); } } endif; if ( ! function_exists( 'is_wp_version_compatible' ) ) : /** * Checks compatibility with the current WordPress version. * * @since 5.2.0 * * @param string $required Minimum required WordPress version. * @return bool True if required version is compatible or empty, false if not. */ function is_wp_version_compatible( $required ) { return empty( $required ) || version_compare( get_bloginfo( 'version' ), $required, '>=' ); } endif; if ( ! function_exists( 'is_php_version_compatible' ) ) : /** * Checks compatibility with the current PHP version. * * @since 5.2.0 * * @param string $required Minimum required PHP version. * @return bool True if required version is compatible or empty, false if not. */ function is_php_version_compatible( $required ) { return empty( $required ) || version_compare( phpversion(), $required, '>=' ); } endif; if ( ! function_exists( 'wp_body_open' ) ) : /** * Fire the wp_body_open action. * * See {@see 'wp_body_open'}. * * @since 5.2.0 */ function wp_body_open() { /** * Triggered after the opening body tag. * * @since 5.2.0 */ do_action( 'wp_body_open' ); } endif;
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