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run code in 200+ php & hhvm versions
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<?php $d = " select 'a' as `áčko` "; preg_match("~^\s*(SELECT|INSERT|UPDATE|DELETE)\s+~i", $d, $m); var_dump($m );
Output for 4.3.0 - 7.2.0
array(2) { [0]=> string(16) " select " [1]=> string(6) "select" }