<?php print_r(preg_split("~@(?>if|else(?>if)?)\s*(?>\([^()]*+\)\s*)?\[(?:[^][@]*+(?>\\.[^][@]*)*(@+(?!(?>if|else(?>if)?)))?|(?R))*\]\K\s*~", "@if(param1>=7) [ something here @if(param1>9)[ nested statement ] ] @elseif(param2==true) [ 2st condition true ] @else [ default condition ]", -1, PREG_SPLIT_NO_EMPTY));
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Value for `_results` contains invalid data `array`