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<?php $i = 37; if ($i = 0;$i <= 37;$i++) { eval('$hex = "\".$i."bbb";'); var_dump($hex); }
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.26
Parse error: syntax error, unexpected ';' in /in/KlrBu on line 3
Process exited with code 255.

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