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run code in 300+ PHP versions simultaneously
<?php error_reporting(0); class FooClass {} $foo = new FooClass(); $foo->bar = "qux"; $thing = "bar"; $qux = "th"; $grault = "ing"; function th($waldo){ global $qux, $grault, $thing; return ${$qux . $grault} . $waldo; } echo ${($foo->${${$foo->bar}.((${qux}.${grault}===$qux.${grault})?${grault}:${$qux.$grault})})}(($foo->${${$foo->bar}.((${qux}.${grault}===$qux.${grault})?${grault}:${$qux.$grault})})); // echos 'barqux'
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6

Process exited with code 255.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.1 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
barqux
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/dX8rB on line 17
Process exited with code 255.
preferences:
259 ms | 401 KiB | 357 Q