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run code in 300+ PHP versions simultaneously
<?php $obj = new stdClass; $obj->p =& $obj; var_export($obj, true);
Output for 5.4.7 - 5.4.45, 5.5.0 - 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: var_export does not handle circular references in /in/rQjN0 on line 4
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: var_export does not handle circular references in /in/rQjN0 on line 4
Output for 5.2.14 - 5.2.17, 5.3.3 - 5.3.29, 5.4.0 - 5.4.6
Fatal error: Nesting level too deep - recursive dependency? in /in/rQjN0 on line 4
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.13, 5.3.0 - 5.3.2
stdClass::__set_state(array( 'p' => stdClass::__set_state(array( 'p' => stdClass::__set_state(array( 'p' => stdClass::__set_state(array( Fatal error: Nesting level too deep - recursive dependency? in /in/rQjN0 on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.5
class stdClass { public $p = class stdClass { public $p = class stdClass { public $p = class stdClass { Fatal error: Nesting level too deep - recursive dependency? in /in/rQjN0 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
class stdClass { var $p = class stdClass { var $p = class stdClass { var $p = class stdClass { var $p = class stdClass { Fatal error: Nesting level too deep - recursive dependency? in /in/rQjN0 on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
class stdClass { var $p = class stdClass { var $p = class stdClass { var $p = class stdClass { var $p = class stdClass { Fatal error: Nesting level too deep - recursive dependency? in /in/rQjN0 on line 4

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