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run code in 150+ php & hhvm versions
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<?php $addr = "http://www.example.com/?pk_lol=VAgin&utm_campaign=printemps&utm_medium=e-mail&utm_source=newsletter1&utm_content=lien-en-haut"; $pattern ="/(utm_campaign=.[^&]+)/?/(utm_medium=.[^&]+)/?/(utm_source=.[^&]+)/?/i"; preg_match($pattern, $addr, $result); print_r($result);
Output for 5.3.28 - 5.3.29, 5.4.20 - 7.1.0
Warning: preg_match(): Unknown modifier '?' in /in/k5VaH on line 7
Output for 5.2.0 - 5.3.27, 5.4.0 - 5.4.19
Warning: preg_match(): Unknown modifier '?' in /in/0RQMY on line 7
Output for 4.3.11 - 5.1.6
Warning: preg_match(): Unknown modifier '?' in /in/0RQMY on line 7 Array ( )
Output for 4.3.1 - 4.3.10
Warning: Unknown modifier '?' in /in/0RQMY on line 7 Array ( )
Output for 4.3.0
Warning: Unknown modifier '?' in /in/k5VaH on line 7 Array ( )