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run code in 300+ PHP versions simultaneously
<?php namespace Foo; interface ThrowablePhp5 {} if (version_compare(PHP_VERSION, '7.0.0', 'lt')) { class_alias('Foo\ThrowablePhp5', '\Throwable'); } interface AnException extends \Throwable {} class FooException extends \Exception implements AnException{}
Output for 5.4.20 - 5.4.45, 5.5.4 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.19, 5.5.0 - 5.5.3
Fatal error: Interface 'Throwable' not found in /in/7NPYS on line 11
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/7NPYS on line 3
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/7NPYS on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/7NPYS on line 3
Process exited with code 255.

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