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<?php $array = [ ['KRA_category'=>'Business'], ['KRA_category'=>'Business'], ['KRA_category'=>'People'], ['KRA_category'=>'Business'], ['KRA_category'=>'Business'], ['KRA_category'=>'Business'] ]; foreach ($array as ['KRA_category' => $value]) { $result[$value] = ($result[$value] ?? -1) + 1; } var_export(array_filter($result));
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array ( 'Business' => 4, )

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