3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A{ public $1 = null; } $a = new A; $item = 1; var_dump(isset($a->$item)); var_dump(array_key_exists($item, $a));
Output for 5.4.0 - 5.4.23, 5.5.0 - 5.5.7
Parse error: syntax error, unexpected '$', expecting variable (T_VARIABLE) in /in/pDNhj on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '$', expecting T_VARIABLE in /in/pDNhj on line 3
Process exited with code 255.
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