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<?php $arrays = array ( 'grinds' => array ( 0 => array ( 'id' => 16562, 'slug' => 'grinds', ), 1 => array ( 'id' => 16561, 'slug' => 'grinds', ), ), 'online-grinds' => array ( 0 => array ( 'id' => 16566, 'slug' => 'online-grinds', ), ), ); $result = []; foreach ($arrays as $key => $array) { $result[$key] = [ array_count_values(array_column($array, 'id')), array_count_values(array_column($array, 'slug')) ]; } print_r($result);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [grinds] => Array ( [0] => Array ( [16562] => 1 [16561] => 1 ) [1] => Array ( [grinds] => 2 ) ) [online-grinds] => Array ( [0] => Array ( [16566] => 1 ) [1] => Array ( [online-grinds] => 1 ) ) )

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