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<?php function a($depth = 0) { //return last backtrace call. If backtrace bigger then 3, return third call. if($depth === 1000) { $tmp = debug_backtrace(false); } return a(++$depth, str_repeat("a", 1000)); } var_dump(a());
Output for 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Out of memory (allocated 31457280 bytes) (tried to allocate 20480 bytes) in /in/HSmP8 on line 10 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 8.1.2 - 8.1.27
Fatal error: Out of memory (allocated 31457280) (tried to allocate 20480 bytes) in /in/HSmP8 on line 10 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.1
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 20480 bytes) in /in/HSmP8 on line 10
Process exited with code 255.
Output for 7.3.32 - 7.3.33, 8.0.13
Fatal error: Out of memory (allocated 130023424) (tried to allocate 20480 bytes) in /in/HSmP8 on line 10 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 1001 bytes) in /in/HSmP8 on line 10
Process exited with code 255.
Output for 5.2.5 - 5.2.17

Process exited with code 139.
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.4
Warning: Wrong parameter count for debug_backtrace() in /in/HSmP8 on line 7
Process exited with code 139.

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