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<?php $a = [1,2,2,3,3,3,4,4,4,4]; $b = [2,3,5]; var_dump( array_intersect($a, $b), // [2,2,3,3,3] array_intersect($b, $a) // [2,3] );
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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
array(5) { [1]=> int(2) [2]=> int(2) [3]=> int(3) [4]=> int(3) [5]=> int(3) } array(2) { [0]=> int(2) [1]=> int(3) }
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 array(5) { [1]=> int(2) [2]=> int(2) [3]=> int(3) [4]=> int(3) [5]=> int(3) } array(2) { [0]=> int(2) [1]=> int(3) }
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 '[' in /in/8ig5r on line 2
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 '[' in /in/8ig5r on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/8ig5r on line 2
Process exited with code 255.
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364.18 ms | 401 KiB | 457 Q