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<?php //this code will append a &mobileapp to every https://example.com url and http://foobar.com url ob_start(); ?> <html> <head> </head> <body> <a href="http://foobar.com"> http://www.example.com/~hillybilly/foobar.php silly silly </body> </html> <?php $html = ob_get_clean(); $append = 'mobileapp'; $doc = new DOMDocument(); $doc->loadHTML($html); $xpath = new DOMXpath($doc); $elements = $xpath->query('//*[@href | @src | @action]'); if (!is_null($elements)) { foreach ($elements as $element) { switch ($element->nodeName) { case 'a': $element->setAttribute('href', $element->getAttribute('href') . '&' . $append); } } } echo $doc->saveHtml();
Output for 8.0.30, 8.1.22 - 8.1.27, 8.2.9 - 8.2.17, 8.3.0 - 8.3.4
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html> <head> </head> <body> <a href="http://foobar.com&amp;mobileapp"> http://www.example.com/~hillybilly/foobar.php silly silly </a></body> </html>
Output for 5.3.3 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.29, 8.1.0 - 8.1.21, 8.2.0 - 8.2.8
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html><head></head><body> <a href="http://foobar.com&amp;mobileapp"> http://www.example.com/~hillybilly/foobar.php silly silly </a></body></html>
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.2
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html> <head></head> <body> <a href="http://foobar.com&amp;mobileapp"> http://www.example.com/~hillybilly/foobar.php silly silly </a> </body> </html>
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Cannot instantiate non-existent class: domdocument in /in/XRDQq on line 17
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: domdocument in /in/XRDQq on line 17

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