Online PHP editor | refs for L7UUm

<?php $a = '0e123'; var_dump($a == 0); var_dump($a == '0'); var_dump($a == "0"); var_dump($a == true); echo "\n"; $_0e=0; var_dump($a == "$_0e"); var_dump($a == 0xe); var_dump($a == 0x0e); echo "\n"; var_dump($a == 0x0); echo "\n"; var_dump($a == '0xe'); var_dump($a == "0xe"); echo "\n"; var_dump($a == '0xe0'); var_dump($a == '0x0e'); var_dump($a == ('0' . 'x0e')); var_dump($a == ('0' . 'e'));