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run code in 300+ PHP versions simultaneously
<?php Class Foo{} $Foo::class;
Output for 8.3.0 - 8.3.6
Warning: Undefined variable $Foo in /in/k0HsO on line 4 Fatal error: Uncaught TypeError: Cannot use "::class" on null in /in/k0HsO:4 Stack trace: #0 {main} thrown in /in/k0HsO on line 4
Process exited with code 255.
Output for 8.1.23 - 8.1.28, 8.2.10 - 8.2.18
Warning: Undefined variable $Foo in /in/k0HsO on line 4 Fatal error: Uncaught TypeError: Cannot use "::class" on value of type null in /in/k0HsO:4 Stack trace: #0 {main} thrown in /in/k0HsO on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.2
Fatal error: Dynamic class names are not allowed in compile-time ::class fetch in /in/k0HsO on line 4
Process exited with code 255.
Output for 5.5.24 - 5.5.31, 5.6.8 - 5.6.17
Parse error: syntax error, unexpected 'class' (T_CLASS), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/k0HsO on line 4
Process exited with code 255.

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