3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = <<<EOF aaaBbb = CccBbb aaaDddd = CccDddd aaaEeee = CccFfff EOF; preg_match_all('/^ +\w+([A-Z][a-z]+) += +(?!\w+\1).*$/m', $str, $matches, PREG_SET_ORDER, 0); var_dump($matches);

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26.5 ms | 405 KiB | 5 Q