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run code in 200+ php & hhvm versions
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<?php var_dump( preg_match('/(.*)\?.*/', 'https://fb.com/v45/x2895.34/320x240/12342523465346.jpg?u=w3544w5a_dsfsd&sdsg=24353453', $matches), $matches );
Output for 4.3.0 - 7.2.0
int(1) array(2) { [0]=> string(85) "https://fb.com/v45/x2895.34/320x240/12342523465346.jpg?u=w3544w5a_dsfsd&sdsg=24353453" [1]=> string(54) "https://fb.com/v45/x2895.34/320x240/12342523465346.jpg" }