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<?php function deriveSP800108HmacSHA256Key($length, $array, $string, $array2) { $n = $n2 = 1; $allocate = []; // length = $length while ($n < $length) { $mac = hash_init('sha256', HASH_HMAC, $array); $allocate2 = pack("L", $n2); hash_update($mac, $allocate2); hash_update($mac, $string); hash_update($mac, pack("L", 0)); hash_update($mac, $array2); $allocate2 = pack("L", $n * 8); hash_update($mac, $allocate2); $final = hash_final($mac, true); $allocate .= $final; $n2++; } return $allocate; } var_dump(deriveSP800108HmacSHA256Key(32, 'array', 'foo', 'array2'));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.1, 8.1.28, 8.2.18, 8.3.5 - 8.3.6
Warning: Array to string conversion in /in/UBcSb on line 20
Process exited with code 137.
Output for 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Warning: Array to string conversion in /in/UBcSb on line 20 Fatal error: Out of memory (allocated 18874368 bytes) (tried to allocate 14680096 bytes) in /in/UBcSb on line 20 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
Warning: Array to string conversion in /in/UBcSb on line 20 Fatal error: Out of memory (allocated 18874368) (tried to allocate 14680096 bytes) in /in/UBcSb on line 20 mmap() failed: [12] Cannot allocate memory mmap() failed: [12] Cannot allocate memory
Process exited with code 255.
Output for 5.5.0 - 5.5.36, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0, 7.2.29 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Notice: Array to string conversion in /in/UBcSb on line 20
Process exited with code 137.
Output for 7.3.32 - 7.3.33

Process exited with code 137.
Output for 7.2.6
Notice: Array to string conversion in /in/UBcSb on line 20 Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 31457312 bytes) in /in/UBcSb on line 20
Process exited with code 255.
preferences:
193.93 ms | 401 KiB | 217 Q