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<?php $content = '<a href="https://example.net">Awesome Button</a> <a href="https://example.net?tag=zero">Awesome Button</a> '; $params = 'param1=blue&param2=red'; echo preg_replace_callback("/(?<=href=[\"'])([^\"'?]+)(?:\?([^\"'?]+))?(?=[\"'])/", function($x) use ($params) { return !empty($x[2]) ? $x[1] . '?' . $params . '&' . $x[2] : $x[1] . '?' . $params; }, $content);
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
<a href="https://example.net?param1=blue&param2=red">Awesome Button</a> <a href="https://example.net?param1=blue&param2=red&tag=zero">Awesome Button</a>
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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