111 lines
2.6 KiB
PHP
111 lines
2.6 KiB
PHP
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<?php
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namespace W3TC;
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class Util_Content {
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/**
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* Check if content is HTML
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*
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* @param string $content
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* @return boolean
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*/
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static public function is_html( $content ) {
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$content = Util_Content::_is_html_prepare( $content );
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return stripos( $content, '<html' ) === 0 ||
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stripos( $content, '<!DOCTYPE' ) === 0;
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}
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/**
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* Check if content is HTML or XML
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*
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* @param string $content
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* @return boolean
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*/
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static public function is_html_xml( $content ) {
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$content = Util_Content::_is_html_prepare( $content );
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return stripos( $content, '<?xml' ) === 0 ||
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stripos( $content, '<html' ) === 0 ||
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stripos( $content, '<!DOCTYPE' ) === 0;
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}
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static private function _is_html_prepare( $content ) {
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if ( strlen( $content ) > 1000 ) {
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$content = substr( $content, 0, 1000 );
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}
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if ( strstr( $content, '<!--' ) !== false ) {
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$content = preg_replace( '~<!--.*?-->~s', '', $content );
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}
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$content = ltrim( $content, "\x00\x09\x0A\x0D\x20\xBB\xBF\xEF" );
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return $content;
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}
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/**
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* If content can handle HTML comments, can disable printout per request using filter 'w3tc_can_print_comment'
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*
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* @param unknown $buffer
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* @return bool
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*/
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static public function can_print_comment( $buffer ) {
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if ( function_exists( 'apply_filters' ) )
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return apply_filters( 'w3tc_can_print_comment', Util_Content::is_html_xml( $buffer ) && !defined( 'DOING_AJAX' ) );
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return Util_Content::is_html_xml( $buffer ) && !defined( 'DOING_AJAX' );
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}
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/**
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* Returns GMT date
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*
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* @param integer $time
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* @return string
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*/
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static public function http_date( $time ) {
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return gmdate( 'D, d M Y H:i:s \G\M\T', $time );
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}
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/**
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* Escapes HTML comment
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*
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* @param string $comment
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* @return mixed
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*/
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static public function escape_comment( $comment ) {
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while ( strstr( $comment, '--' ) !== false ) {
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$comment = str_replace( '--', '- -', $comment );
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}
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return $comment;
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}
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/**
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* Deprecated. Added to prevent loading-order errors during upgrades
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* from older w3tc plugin versions
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**/
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static public function is_database_error() {
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return false;
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}
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/**
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* Converts
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* 127.0.0.1:1234 to ( '123.0.0.1', 1234 )
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* tls://127.0.0.1:1234 to ( 'tls://123.0.0.1', 1234 )
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* unix:/my/pipe to ( 'unix:/my/pipe', 0 )
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*
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* Doesnt fit to that class perfectly but selected due to common usage
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* of loaded classes
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*/
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static public function endpoint_to_host_port( $server, $port_default = 0 ) {
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$p = strrpos( $server, ':' );
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if ( substr( $server, 0, 5 ) == 'unix:' || $p === false ) {
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return array( trim( $server ), $port_default );
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}
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return array(
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trim( substr( $server, 0, $p ) ),
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(int)substr( $server, $p + 1 ) );
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}
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}
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