3v4l.org

run code in 300+ PHP versions simultaneously
<?php json_encode($_SESSION\['hi'\], JSON_HEX_TAG);
Output for 5.4.0 - 5.4.20
Parse error: syntax error, unexpected '\' (T_NS_SEPARATOR) in /in/0mro9 on line 1
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected T_NS_SEPARATOR in /in/0mro9 on line 1
Process exited with code 255.
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181.45 ms | 1395 KiB | 56 Q