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<?php function fact($i) { if ($i === 5) { // our base case return '$i is 5'; } else { return fact($i--); // <--calling itself. } } $i = 6; echo fact($i);
Output for 7.4.3 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.1, 8.1.28, 8.2.18, 8.3.5 - 8.3.6
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 262144 bytes) in /in/jIImN on line 7
Process exited with code 255.
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 262144 bytes) in /in/jIImN on line 7 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 262144 bytes) in /in/jIImN on line 7 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 8.0.13
Fatal error: Out of memory (allocated 130023424) (tried to allocate 262144 bytes) in /in/jIImN on line 7 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, 7.1.6 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 262144 bytes) in /in/jIImN on line 3
Process exited with code 255.
Output for 7.3.32 - 7.3.33
Fatal error: Out of memory (allocated 130023424) (tried to allocate 262144 bytes) in /in/jIImN on line 3 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 7.1.5

Process exited with code 137.
Output for 5.4.0 - 5.4.45, 5.6.7 - 5.6.28
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 130968 bytes) in /in/jIImN on line 7
Process exited with code 255.
Output for 5.5.24 - 5.5.35
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 32 bytes) in /in/jIImN on line 7
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 523800 bytes) in /in/jIImN on line 7
Process exited with code 255.
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 - 5.2.17

Process exited with code 139.

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