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<?php function array_key_match($target, $match) { $targetKeys = array_keys($target); $diff = array_diff($target, $match); return ($diff == array_diff($diff, $match)); } function test($target, $match, $expect) { return preg_replace('/\n/', '', sprintf( "Target %s, Match %s: %s\n", print_r($target, true), print_r($match, true), (array_key_match($target, $match) == $expect) ? 'true' : 'false' )); } print test([1, 2, 3, 4, 5], [2, 3], true); print test(['a', 'b', 'c'], ['c', 'b'], true); print test([1, 2, 3, 4, 5], [4, 5, 6], false);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Target Array( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5), Match Array( [0] => 2 [1] => 3): trueTarget Array( [0] => a [1] => b [2] => c), Match Array( [0] => c [1] => b): trueTarget Array( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5), Match Array( [0] => 4 [1] => 5 [2] => 6): false
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Target Array( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5), Match Array( [0] => 2 [1] => 3): trueTarget Array( [0] => a [1] => b [2] => c), Match Array( [0] => c [1] => b): trueTarget Array( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5), Match Array( [0] => 4 [1] => 5 [2] => 6): false
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/Asr4T on line 20
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 '[', expecting ')' in /in/Asr4T on line 20
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/Asr4T on line 20
Process exited with code 255.

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