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run code in 300+ PHP versions simultaneously
<?php interface Foo {} class Bar {} $bar = new Bar(); var_dump(is_a($bar), 'Foo');
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught ArgumentCountError: is_a() expects at least 2 arguments, 1 given in /in/FF1Kl:7 Stack trace: #0 /in/FF1Kl(7): is_a(Object(Bar)) #1 {main} thrown in /in/FF1Kl on line 7
Process exited with code 255.
Output for 5.3.9 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Warning: is_a() expects at least 2 parameters, 1 given in /in/FF1Kl on line 7 NULL string(3) "Foo"
Output for 5.3.0 - 5.3.8
Warning: is_a() expects exactly 2 parameters, 1 given in /in/FF1Kl on line 7 NULL string(3) "Foo"
Output for 5.2.3 - 5.2.17
Warning: Wrong parameter count for is_a() in /in/FF1Kl on line 7 NULL string(3) "Foo"
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Warning</b>: Wrong parameter count for is_a() in <b>/in/FF1Kl</b> on line <b>7</b><br /> NULL string(3) "Foo"
Output for 4.4.2 - 4.4.9
<br /> <b>Parse error</b>: syntax error, unexpected T_STRING in <b>/in/FF1Kl</b> on line <b>2</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
<br /> <b>Parse error</b>: parse error, unexpected T_STRING in <b>/in/FF1Kl</b> on line <b>2</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/FF1Kl</b> on line <b>2</b><br />
Process exited with code 255.

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