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<?php $array = [ ['Rank' => 7, 'Suit' => 'Hearts'], ['Rank' => 3, 'Suit' => 'Hearts'], ['Rank' => 6, 'Suit' => 'Spades'], ['Rank' => 10, 'Suit' => 'Spades'], ['Rank' => 3, 'Suit' => 'Spades'], ['Rank' => 6, 'Suit' => 'Hearts'], ['Rank' => 2, 'Suit' => 'Clubs'], ]; $rankCounts = array_count_values(array_column($array, 'Rank')); usort( $array, function($a, $b) use ($rankCounts) { return [$rankCounts[$b['Rank']], $b['Rank']] <=> [$rankCounts[$a['Rank']], $a['Rank']]; } ); var_export($array);
Output for 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 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
array ( 0 => array ( 'Rank' => 6, 'Suit' => 'Spades', ), 1 => array ( 'Rank' => 6, 'Suit' => 'Hearts', ), 2 => array ( 'Rank' => 3, 'Suit' => 'Hearts', ), 3 => array ( 'Rank' => 3, 'Suit' => 'Spades', ), 4 => array ( 'Rank' => 10, 'Suit' => 'Spades', ), 5 => array ( 'Rank' => 7, 'Suit' => 'Hearts', ), 6 => array ( 'Rank' => 2, 'Suit' => 'Clubs', ), )
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 ( 'Rank' => 6, 'Suit' => 'Spades', ), 1 => array ( 'Rank' => 6, 'Suit' => 'Hearts', ), 2 => array ( 'Rank' => 3, 'Suit' => 'Hearts', ), 3 => array ( 'Rank' => 3, 'Suit' => 'Spades', ), 4 => array ( 'Rank' => 10, 'Suit' => 'Spades', ), 5 => array ( 'Rank' => 7, 'Suit' => 'Hearts', ), 6 => array ( 'Rank' => 2, 'Suit' => 'Clubs', ), )

preferences:
195.1 ms | 403 KiB | 184 Q