- parse_str: documentation ( source)
- parse_url: documentation ( source)
<?php
$html = <<<'EOD'
aaa
<a href="link.php?x=banana">text 1</a>
bbb
<a href="different_url.php">text 2</a>
ccc
<a href="link.php?x=orange">text 3</a>
ddd
EOD;
$dom = new DOMDocument;
$dom->loadHTML('<div id="root">' . $html . '</div>');
$nodeList = $dom->getElementsByTagName('a');
foreach($nodeList as $link) {
$query = parse_url($link->getAttribute('href'), PHP_URL_QUERY);
if ( !$query ) continue;
parse_str($query, $arr);
if ( isset($arr['x']) )
$link->parentNode->insertBefore($dom->createTextNode($arr['x'] . ' '), $link);
}
$result = '';
foreach($dom->getElementById('root')->childNodes as $childNode) {
$result .= $dom->saveHTML($childNode);
}
echo $result;