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<?php //echo preg_replace('/(?:(?!dog).)++/', '<$0>', 'where my dog is now?'); preg_match_all('/[^a]/', 'бaabaabaaaaabbb', $a); print_r($a);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
Array ( [0] => Array ( [0] => � [1] => � [2] => b [3] => b [4] => b [5] => b [6] => b ) )