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<?php $students = [ [ "country" => "japan", "school" => "kyoto university", "name" => "Naruto Uzumaki" ], [ "country" => "usa", "school" => "harvard university", "name" => "Naruto Uzumaki" ], [ "country" => "japan", "school" => "tokyo university", "name" => "sasuke Uchiha" ], [ "country" => "japan", "school" => "tokyo university", "name" => "kakashi hatake" ], ]; $result = []; foreach ($students as $student) { extract($student); $result[$country][$school] = $student; } var_export($result);
Output for rfc.property-hooks, git.master, git.master_jit
array ( 'japan' => array ( 'kyoto university' => array ( 'country' => 'japan', 'school' => 'kyoto university', 'name' => 'Naruto Uzumaki', ), 'tokyo university' => array ( 'country' => 'japan', 'school' => 'tokyo university', 'name' => 'kakashi hatake', ), ), 'usa' => array ( 'harvard university' => array ( 'country' => 'usa', 'school' => 'harvard university', 'name' => 'Naruto Uzumaki', ), ), )

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