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alxfv/gist:5458446

Created April 25, 2013 08:57
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Add attribute rel nofollow
Raw
gistfile1.php
<?php
$str = '<!doctype html>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<a href="http://km.ru">test</a>
</body>
</html>';
echo htmlspecialchars($str) . '<br>';
$dom = new DOMDocument;
$dom->loadHTML($str);
$anchors = $dom->getElementsByTagName('a');
foreach($anchors as $anchor) {
$rel = array();
if ($anchor->hasAttribute('rel') AND ($relAtt = $anchor->getAttribute('rel')) !== '') {
$rel = preg_split('/\s+/', trim($relAtt));
}
if (in_array('nofollow', $rel)) {
continue;
}
$rel[] = 'nofollow';
$anchor->setAttribute('rel', implode(' ', $rel));
}
$str = $dom->saveHTML();
echo htmlspecialchars($str);
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