3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = null; $base = 1024; isset($foo) ?? echo 'nop';
Output for 7.0.0 - 7.0.1
Parse error: syntax error, unexpected 'echo' (T_ECHO) in /in/4CRX8 on line 5
Process exited with code 255.
Output for 5.5.24 - 5.5.30, 5.6.8 - 5.6.16
Parse error: syntax error, unexpected '?' in /in/4CRX8 on line 5
Process exited with code 255.
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