3v4l.org

run code in 300+ PHP versions simultaneously
<?php define('CONSTANT', 1); define('_CONSTANT', 0); define('EMPTY', ''); var_dump(empty(EMPTY));
Output for 5.4.0 - 5.4.20
Parse error: syntax error, unexpected 'EMPTY' (T_EMPTY) in /in/hvBfE on line 6
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected T_EMPTY in /in/hvBfE on line 6
Process exited with code 255.
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181.82 ms | 1395 KiB | 56 Q