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run code in 300+ PHP versions simultaneously
<?php $x = 2; var_dump(array(($x => $x)));
Output for 5.4.0 - 5.4.14
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW) in /in/FLTco on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.24
Parse error: syntax error, unexpected T_DOUBLE_ARROW in /in/FLTco on line 5
Process exited with code 255.

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