3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo pack('v', 0x00)
Output for 5.4.0 - 5.4.28
Parse error: syntax error, unexpected end of file, expecting ',' or ';' in /in/TGltA on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected $end, expecting ',' or ';' in /in/TGltA on line 2
Process exited with code 255.

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