73 lines
2.0 KiB
PHP
73 lines
2.0 KiB
PHP
<?php
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namespace W3TC;
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class Minify_Extract {
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/**
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* Extracts JS files from content
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* w3tc-url-escaping: When rendered, URLs need to be escaped via
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* htmlspecialchars instead of esc_attr to not change the way it is encoded
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* in source html. E.g. html contains a&b Using esc_attr that will not
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* double escape it as a result config value will be a&b.
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*
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* @param string $content
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* @return array
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*/
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static public function extract_js( $content ) {
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$matches = null;
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$files = array();
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$content = preg_replace( '~<!--.*?-->~s', '', $content );
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if ( preg_match_all( '~<script\s+[^<>]*src=["\']?([^"\']+)["\']?[^<>]*>\s*</script>~is',
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$content, $matches ) ) {
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$files = $matches[1];
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}
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$files = array_values( array_unique( $files ) );
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return $files;
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}
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/**
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* Extract CSS files from content
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*
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* @param string $content
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* @return array
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*/
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static public function extract_css( $content ) {
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$content = preg_replace( '~<!--.*?-->~s', '', $content );
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$tags_files = array();
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$matches = null;
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if ( preg_match_all( '~<link\s+([^>]+)/?>(.*</link>)?~Uis', $content,
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$matches, PREG_SET_ORDER ) ) {
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foreach ( $matches as $match ) {
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$attrs = array();
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$attr_matches = null;
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if ( preg_match_all( '~(\w+)=["\']([^"\']*)["\']~', $match[1],
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$attr_matches, PREG_SET_ORDER ) ) {
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foreach ( $attr_matches as $attr_match ) {
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$attrs[$attr_match[1]] = trim( $attr_match[2] );
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}
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}
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if ( isset( $attrs['href'] ) && isset( $attrs['rel'] ) &&
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stristr( $attrs['rel'], 'stylesheet' ) !== false &&
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( !isset( $attrs['media'] ) || stristr( $attrs['media'], 'print' ) === false ) ) {
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$tags_files[] = array( $match[0], $attrs['href'] );
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}
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}
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}
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if ( preg_match_all( '~@import\s+(url\s*)?\(?["\']?\s*([^"\'\)\s]+)\s*["\']?\)?[^;]*;?~is',
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$content, $matches, PREG_SET_ORDER ) ) {
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foreach ( $matches as $match )
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$tags_files[] = array( $match[0], $match[2] );
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}
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return $tags_files;
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}
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}
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