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<?php ini_set('memory_limit', '1G'); $hashes = array_map(function ($num) { return substr(md5($num), 0, 8); }, range(0, 10000000)); print_r(array_slice($hashes, 0, 10)); if (array_unique($hashes) == $hashes) { echo 'all unique'; } else { echo 'collisions detected'; }
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Out of memory (allocated 2097152 bytes) (tried to allocate 268435464 bytes) in /in/TGmNB on line 5 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 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Fatal error: Out of memory (allocated 2097152) (tried to allocate 536870920 bytes) in /in/TGmNB on line 5 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 5.6.28
Fatal error: Out of memory (allocated 259522560) (tried to allocate 32 bytes) in /in/TGmNB on line 5
Process exited with code 255.
Output for 5.6.25
Fatal error: Out of memory (allocated 259784704) (tried to allocate 32 bytes) in /in/TGmNB on line 5
Process exited with code 255.
Output for 5.5.0 - 5.5.16, 5.5.19 - 5.5.38, 5.6.0 - 5.6.24
Fatal error: Out of memory (allocated 258998272) (tried to allocate 32 bytes) in /in/TGmNB on line 5
Process exited with code 255.
Output for 5.5.18
Fatal error: Out of memory (allocated 258736128) (tried to allocate 32 bytes) in /in/TGmNB on line 5
Process exited with code 255.
Output for 5.4.15 - 5.4.45
Fatal error: Out of memory (allocated 260308992) (tried to allocate 32 bytes) in /in/TGmNB on line 5
Process exited with code 255.
Output for 5.4.0 - 5.4.14
Fatal error: Out of memory (allocated 260571136) (tried to allocate 32 bytes) in /in/TGmNB on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.26, 5.3.28 - 5.3.29
Fatal error: Out of memory (allocated 265551872) (tried to allocate 32 bytes) in /in/TGmNB on line 5
Process exited with code 255.
Output for 5.3.27
Fatal error: Out of memory (allocated 261619712) (tried to allocate 32 bytes) in /in/TGmNB on line 5
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/TGmNB on line 5
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/TGmNB on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/TGmNB on line 5
Process exited with code 255.
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