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run code in 300+ PHP versions simultaneously
<?php $a = range(0, 20000000); $b = array_map(function($z){ return $z*2; }, $a);
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 536870920 bytes) in /in/BtaJ8 on line 2
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 1073741832 bytes) in /in/BtaJ8 on line 2
Process exited with code 255.
Output for 7.3.32 - 7.3.33, 8.0.13
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 1073741832 bytes) in /in/BtaJ8 on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 32 bytes) in /in/BtaJ8 on line 2
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_FUNCTION, expecting ')' in /in/BtaJ8 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_FUNCTION, expecting ')' in /in/BtaJ8 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/BtaJ8 on line 3
Process exited with code 255.

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