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run code in 150+ php & hhvm versions
Bugs & Features
<?php $pattern = '/.*(?<!%)[A-Z]+.*/'; $string = 'aaa%Dfa'; $res = preg_match ( $pattern, $string, $result ); var_dump( $res, $result );
Output for 4.3.0 - 7.1.0
int(0) array(0) { }