Stuff
public php v1 · immutable<?$b=' abc def ';$fun2='(?=abc)';preg_match_all("/".$fun2."/i",$b,$match);print_r($match);/*OUTPUTArray( [0] => Array ( [0] => ))*/ ?><?$b=' abc def ';$fun2='(?=abc)';preg_match_all("/".$fun2."/i",$b,$match);print_r($match);/*OUTPUTArray( [0] => Array ( [0] => ))*/ ?>