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<?php
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/**
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* moves all css definitions from <body> into <head> section
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* @param string $content
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* @return string
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*/
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function doFilterCssToHead($content) {
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// move css definitions into head section
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$pattern1 = '/(?:<body.*?)(<link[^>]*?\"text\/css\".*?\/>)/si';
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$pattern2 = '/(?:<body.*?)(<style[^>]*?\"text\/css\"[^>]*?>.*?<\/style>)/si';
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while(preg_match($pattern1, $content, $matches)==1) {
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// loop through all linked CSS
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$insert = $matches[1];
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$content = str_replace($insert, '', $content);
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$insert = "\n".$insert."\n</head>\n<body";
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$content = preg_replace('/<\/head>.*?<body/si', $insert, $content);
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}
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while(preg_match($pattern2, $content, $matches)==1) {
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// loop through all inline CSS
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$insert = $matches[1];
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$content = str_replace($insert, '', $content);
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$insert = "\n".$insert."\n</head>\n<body";
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$content = preg_replace('/<\/head>.*?<body/si', $insert, $content);
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}
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return $content;
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}
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