1000 ) { $content = substr( $content, 0, 1000 ); } if ( strstr( $content, '~s', '', $content ); } $content = ltrim( $content, "\x00\x09\x0A\x0D\x20\xBB\xBF\xEF" ); return $content; } /** * If content can handle HTML comments, can disable printout per request using filter 'w3tc_can_print_comment' * * @param unknown $buffer * @return bool */ static public function can_print_comment( $buffer ) { if ( function_exists( 'apply_filters' ) ) return apply_filters( 'w3tc_can_print_comment', Util_Content::is_html_xml( $buffer ) && !defined( 'DOING_AJAX' ) ); return Util_Content::is_html_xml( $buffer ) && !defined( 'DOING_AJAX' ); } /** * Returns GMT date * * @param integer $time * @return string */ static public function http_date( $time ) { return gmdate( 'D, d M Y H:i:s \G\M\T', $time ); } /** * Escapes HTML comment * * @param string $comment * @return mixed */ static public function escape_comment( $comment ) { while ( strstr( $comment, '--' ) !== false ) { $comment = str_replace( '--', '- -', $comment ); } return $comment; } /** * Deprecated. Added to prevent loading-order errors during upgrades * from older w3tc plugin versions **/ static public function is_database_error() { return false; } }