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<?php |
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|
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class Page_Optimize_Utils { |
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public static function cache_bust_mtime( $path, $siteurl ) { |
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static $dependency_path_mapping; |
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|
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$url = $siteurl . $path; |
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|
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if ( strpos( $url, '?m=' ) ) { |
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return $url; |
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} |
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|
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$parts = parse_url( $url ); |
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if ( ! isset( $parts['path'] ) || empty( $parts['path'] ) ) { |
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return $url; |
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} |
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|
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if ( empty( $dependency_path_mapping ) ) { |
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$dependency_path_mapping = new Page_Optimize_Dependency_Path_Mapping(); |
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} |
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|
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$file = $dependency_path_mapping->dependency_src_to_fs_path( $url ); |
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|
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$mtime = false; |
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if ( file_exists( $file ) ) { |
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$mtime = filemtime( $file ); |
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} |
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|
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if ( ! $mtime ) { |
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return $url; |
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} |
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|
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if ( false === strpos( $url, '?' ) ) { |
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$q = ''; |
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} else { |
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list( $url, $q ) = explode( '?', $url, 2 ); |
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if ( strlen( $q ) ) { |
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$q = '&' . $q; |
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} |
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} |
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|
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return "$url?m={$mtime}{$q}"; |
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} |
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} |
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|
