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Filename : themify-status.php
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<?php
/**
 * Generate reports of various system variables and configs, useful for debugging.
 * This only available to administrators.
 *
 * @package Themify
 */
class Themify_System_Status {

    public static function init() {
        add_action( 'admin_menu', array( __CLASS__, 'admin_menu' ) );
    }

    public static function admin_menu() {
        $parent = is_plugin_active( 'themify-builder/themify-builder.php' ) ? 'themify-builder' : 'themify';
        add_submenu_page ( $parent, __( 'System Status', 'themify' ), __( 'System Status', 'themify' ), 'manage_options', 'tf-status', array( __CLASS__, 'admin' ) );
    }

    public static function admin() {
        global $wpdb;
        $server_info = isset( $_SERVER['SERVER_SOFTWARE'] ) ? self::sanitize_deep( wp_unslash( $_SERVER['SERVER_SOFTWARE'] ) ) : '';
        $r=false;
        foreach(array('/etc/lsb-release','/etc/os-release','/etc/redhat-release') as $dist){
            if(@is_readable($dist)){
                            $r=@parse_ini_file($dist);
                            break;
            }
        }
        $tables=array(
            $wpdb->posts,
            $wpdb->postmeta,
            $wpdb->options,
            $wpdb->terms,
            $wpdb->term_taxonomy,
            $wpdb->term_relationships
        );
        
        ?>
<div class="wrap">
    <h1><?php _e( 'System Status', 'themify' ); ?></h1>
    <table class="tf_status_table widefat" cellspacing="0">
        <thead>
            <tr>
                <td colspan="3"><h2><?php esc_html_e( 'Server environment', 'themify' ); ?></h2></td>
            </tr>
        </thead>
        <tbody>
            <tr>
                <th scope="row"><?php esc_html_e( 'OS', 'themify' ); ?>:</th>
                <td>
                    <?php
                    if ( is_array( $r ) && ( isset( $r['PRETTY_NAME'] ) || isset( $r['NAME'] ) ) ) {
                        if ( isset( $r['PRETTY_NAME'] ) ) {
                            echo $r['PRETTY_NAME'];
                        } else {
                            echo $r['NAME'];
                        }
                    } elseif ( function_exists( 'php_uname' ) ) {
                        echo php_uname('s');
                    } else {
                        echo '<span class="dashicons dashicons-warning"></span>', __( 'Cannot be determined.', 'themify' );
                    }
                    ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'Server info', 'themify' ); ?>:</th>
                <td>
                    <?php echo esc_html( $server_info ); ?>
                    <br>
                    <strong><?php esc_html_e( 'Server IP', 'themify' ); ?></strong>: <?php echo $_SERVER['SERVER_ADDR']; ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'PHP version', 'themify' ); ?>:</th>
                <td>
                    <?php
                    echo phpversion();
                    if ( version_compare( phpversion(), '7.2', '<' ) ) {
                        echo '<span class="dashicons dashicons-warning"></span> ' . __( 'We recommend using PHP version 7.2 or above for greater performance and security. Please contact your web hosting provider.', 'themify' );
                    }
                    ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'WordPress Version', 'themify' ); ?>:</th>
                <td>
                    <?php
                    global $wp_version;
                    echo $wp_version;
                    ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'Database', 'themify' ); ?>:</th>
                <td><?php echo $wpdb->db_server_info(); ?></td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'Debug Mode', 'themify' ); ?>:</th>
                <td><?php echo ( defined( 'WP_DEBUG' ) && WP_DEBUG ) ? __( 'Enabled', 'themify' ) : __( 'Disabled', 'themify' ); ?></td>
            </tr>
            <?php if ( function_exists( 'ini_get' ) ) : ?>
                <tr>
                    <th scope="row"><?php esc_html_e( 'PHP post max size', 'themify' ); ?>:</th>
                    <td><?php echo esc_html( size_format( wp_convert_hr_to_bytes( ini_get( 'post_max_size' ) ) ) ); ?></td>
                </tr>
                <tr>
                    <th scope="row"><?php esc_html_e( 'PHP time limit', 'themify' ); ?>:</th>
                    <td><?php echo esc_html( (int) ini_get( 'max_execution_time' ) ); ?></td>
                </tr>
                <tr>
                    <th scope="row"><?php esc_html_e( 'PHP memory limit', 'themify' ); ?>:</th>
                    <td>
                        <strong>WP_MEMORY_LIMIT</strong>: <?php echo esc_html( size_format( wp_convert_hr_to_bytes( WP_MEMORY_LIMIT ) ) ); ?><br>
                        <strong><?php _e( 'PHP Memory Limit', 'themify' ); ?></strong>: <?php echo esc_html( size_format( wp_convert_hr_to_bytes( ini_get( 'memory_limit' ) ) ) ); ?>
                    </td>
                </tr>
                <tr>
                    <th scope="row"><?php esc_html_e( 'PHP max input vars', 'themify' ); ?>:</th>
                    <td><?php echo esc_html( (int) ini_get( 'max_input_vars' ) ); ?></td>
                </tr>
                <tr>
                    <th scope="row"><?php esc_html_e( 'cURL version', 'themify' ); ?>:</th>
                    <td><?php echo esc_html( self::get_curl_version() ); ?></td>
                </tr>
                <tr>
                    <th scope="row"><?php esc_html_e( 'SUHOSIN installed', 'themify' ); ?>:</th>
                    <td><?php echo extension_loaded( 'suhosin' ) ? '<span class="dashicons dashicons-yes"></span>' : '&ndash;'; ?></td>
                </tr>
            <?php endif; ?>
            <tr>
                <th scope="row"><?php esc_html_e( 'Max upload size', 'themify' ); ?>:</th>
                <td><?php echo esc_html( size_format( wp_max_upload_size() ) ); ?></td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'fsockopen/cURL', 'themify' ); ?>:</th>
                <td>
                    <?php
                    if ( function_exists( 'fsockopen' ) || function_exists( 'curl_init' ) ) {
                        echo '<span class="dashicons dashicons-yes"></span>';
                    } else {
                        echo '<mark class="error"><span class="dashicons dashicons-warning"></span> ' . esc_html__( 'Your server does not have fsockopen or cURL enabled - some features that require connecting to external web services may not work. Contact your hosting provider.', 'themify' ) . '</mark>';
                    }
                    ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'Custom Tables Allowed', 'themify' ); ?>:</th>
                <td>
                    <?php
                    if ( Themify_Storage::init()!==false ) {
                        echo '<span class="dashicons dashicons-yes"></span>';
                    } else {
                        echo '<mark class="error"><span class="dashicons dashicons-warning"></span> ' . esc_html__( 'Your server does not have have permissions to create custom tables in DB', 'themify' ) . '</mark>';
                    }
                    ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'GZip', 'themify' ); ?>:</th>
                <td>
                    <?php
                    $gzip = TFCache::get_available_gzip();
                    if ( false !== $gzip ) {
                        $gzip = current( $gzip );
                        echo '<span class="dashicons dashicons-yes"></span> ' . $gzip['f'];
                    } else {
                        echo '<mark class="error"><span class="dashicons dashicons-warning"></span> ' . sprintf( __( '<a href="%s">GZIP</a> is recommended for better performance.', 'themify' ), 'https://php.net/manual/en/zlib.installation.php' ) . '</mark>';
                    }
                    ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'Multibyte string', 'themify' ); ?>:</th>
                <td>
                    <?php
                    if ( extension_loaded( 'mbstring' ) ) {
                        echo '<span class="dashicons dashicons-yes"></span>';
                    } else {
                        /* Translators: %s: classname and link. */
                        echo '<mark class="error"><span class="dashicons dashicons-warning"></span> ' . sprintf( esc_html__( 'Your server does not support the %s functions - this is required for better character encoding. Some fallbacks will be used instead for it.', 'themify' ), '<a href="https://php.net/manual/en/mbstring.installation.php">mbstring</a>' ) . '</mark>';
                    }
                    ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'Uploads folder', 'themify' ); ?>:</th>
                <td>
                    <?php
                    $dir = themify_upload_dir();
                    echo '<p><strong>' . __( 'Base Dir ', 'themify' ) . '</strong>: ' . $dir['basedir'] . '<br>' . '<strong>' . __( 'Base URL ', 'themify' ) . '</strong>: ' . $dir['baseurl'] . '</p>';
                    if ( strpos( $dir['baseurl'], 'http' ) === false ) {
                        echo '<mark class="error"><span class="dashicons dashicons-warning"></span> ' . esc_html__( 'Protocol missing from URL, this can cause missing assets on frontend.', 'themify' ) . '</mark>';
                    }
                    ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'Concate CSS folder', 'themify' ); ?>:</th>
                <td>
                    <?php
                    $dir = Themify_Enqueue_Assets::getCurrentVersionFolder();
                    echo $dir . ' - ';
                    if ( Themify_Filesystem::is_writable( $dir ) ) {
                        echo '<span class="dashicons dashicons-yes"></span>';
                    } else {
                        echo '<mark class="error"><span class="dashicons dashicons-warning"></span> ' . esc_html__( 'Uploads folder is not writeable, your CSS may not display correctly.', 'themify' ) . '</mark>';
                    }
                    ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'Image Processing Library', 'themify' ); ?>:</th>
                <td>
                    <?php
                    $image_editor = _wp_image_editor_choose();
                    if ( empty( $image_editor ) ) {
                        echo '<mark class="error"><span class="dashicons dashicons-warning"></span> ' . esc_html__( 'No image processing library found. Please contact your web hosting to enable this.', 'themify' ) . '</mark>';
                    } else {
                        echo '<span class="dashicons dashicons-yes"></span>' . $image_editor;
                    }
                    ?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'Mysql version', 'themify' ); ?>:</th>
                <td>
                    <?php echo $wpdb->db_version();?>
                </td>
            </tr>
            <tr>
                <th scope="row"><?php esc_html_e( 'Storage engine', 'themify' ); ?>:</th>
                <td>
                    <table>
                    <?php foreach($tables as $t):?>
                    <tr>
                       <th scope="row"><?php echo $t?></th>
                        <td>
                        <?php $engine=$wpdb->get_row( $wpdb->prepare( "SHOW TABLE STATUS WHERE Name = '%s'", $t ));
                        echo $engine->Engine;
                        if($engine->Engine==='InnoDB'){
                            echo '<span class="dashicons dashicons-yes"></span>';
                        }
                        else{
                            echo '<mark class="error"><span class="dashicons dashicons-warning"></span> ' . sprintf( __( 'Please consider using <a href="%s" target="_blank">InnoDB engine</a> which offers a lot of advantages and keeps your data safe. You can contact your web hosting to upgrade this for you.', 'themify' ), 'https://core.trac.wordpress.org/ticket/9422' ) . '</mark>';
                        }
                        ?></td>
                    </tr>
                    <?php endforeach;?>
                    </table>
                </td>
            </tr>
        </tbody>
    </table>
</div>
        <?php
    }

    public static function get_curl_version() {
        $curl_version = '';
        if ( function_exists( 'curl_version' ) ) {
            $curl_version = curl_version();
            $curl_version = $curl_version['version'] . ', ' . $curl_version['ssl_version'];
        } elseif ( extension_loaded( 'curl' ) ) {
            $curl_version = __( 'cURL installed but unable to retrieve version.', 'themify' );
        }
        return $curl_version;
    }

    /**
     * Applies sanitize_ function on multidimensional array
     *
     * @return mixed
     */
    public static function sanitize_deep( $value ) {
        if ( is_array( $value ) ) { 
            return array_map( 'wc_clean', $value ); 
        } else { 
            return is_scalar( $value ) ? sanitize_text_field( $value ) : $value; 
        }
    }
}
Themify_System_Status::init();