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<?php $html = <<<HTML <p><a rel="nofollow" class="external text" href="http://10.20.0.30:1234/index.php/this_is_an_example.html">How_to_sample.</a></p> HTML; $dom = new DOMDocument; $dom->loadHTML($html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD); foreach($dom->getElementsByTagName('a') as $a) { $a->setAttribute('href', str_replace('_', '%20', $a->getAttribute('href'))); } echo $dom->saveHTML();
Output for git.master, git.master_jit, rfc.property-hooks
<p><a rel="nofollow" class="external text" href="http://10.20.0.30:1234/index.php/this%20is%20an%20example.html">How_to_sample.</a></p>

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