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<?php $array = [ ['id' => 7867867, 'animal' => 'Dog'], ['id' => 3452342, 'animal' => 'Lion'], ['id' => 1231233, 'animal' => 'Lion'], ['id' => 5867867, 'animal' => 'Dog'], ['id' => 1111111, 'animal' => 'Zeebra'], ['id' => 2222222, 'animal' => 'Cat'], ['id' => 3333333, 'animal' => 'Cat'], ['id' => 4444444, 'animal' => 'Zeebra'] ]; $priorities = array_flip(['Lion', 'Dog', 'Zeebra', 'Cat']); usort($array, fn($a, $b) => $priorities[$a['animal']] <=> $priorities[$b['animal']]); var_export($array);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
array ( 0 => array ( 'id' => 3452342, 'animal' => 'Lion', ), 1 => array ( 'id' => 1231233, 'animal' => 'Lion', ), 2 => array ( 'id' => 7867867, 'animal' => 'Dog', ), 3 => array ( 'id' => 5867867, 'animal' => 'Dog', ), 4 => array ( 'id' => 1111111, 'animal' => 'Zeebra', ), 5 => array ( 'id' => 4444444, 'animal' => 'Zeebra', ), 6 => array ( 'id' => 2222222, 'animal' => 'Cat', ), 7 => array ( 'id' => 3333333, 'animal' => 'Cat', ), )
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 ( 0 => array ( 'id' => 3452342, 'animal' => 'Lion', ), 1 => array ( 'id' => 1231233, 'animal' => 'Lion', ), 2 => array ( 'id' => 7867867, 'animal' => 'Dog', ), 3 => array ( 'id' => 5867867, 'animal' => 'Dog', ), 4 => array ( 'id' => 1111111, 'animal' => 'Zeebra', ), 5 => array ( 'id' => 4444444, 'animal' => 'Zeebra', ), 6 => array ( 'id' => 2222222, 'animal' => 'Cat', ), 7 => array ( 'id' => 3333333, 'animal' => 'Cat', ), )
Output for 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ')' in /in/tQru6 on line 15
Process exited with code 255.
Output for 7.1.26 - 7.1.33, 7.2.0 - 7.2.33
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ',' or ')' in /in/tQru6 on line 15
Process exited with code 255.

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