<?php $string = <<<DATA {start} SubPattern1 {end} {start} SubPattern2 {end} {start} {start}SubPattern3{end} {end} DATA; preg_match_all('/{start}((?:(?:(?!{(?:start|end)}).)+|(?R))*){end}/', $string, $result); print_r($result);
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Value for `_results` contains invalid data `array`