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<?php $classType = [ ["class" => "1", "type" => "A"], ["class" => "2", "type" => "A"], ["class" => "3", "type" => "B"] ]; $clollege['studentDetails'] = [ ["grade" => "2", "hobbies" => ["A" , "B"] ], ["grade" => "2", "hobbies" => ["A" ] ], ["grade" => "3", "hobbies" => [ "C" ] ] ]; $classType = array_column($classType, 'type', "class"); array_walk($clollege['studentDetails'], function(&$item) use($classType) { $item['type'] = $classType[$item['grade']]; }); echo '<pre>', print_r($clollege['studentDetails']);
Output for git.master, git.master_jit, rfc.property-hooks
<pre>Array ( [0] => Array ( [grade] => 2 [hobbies] => Array ( [0] => A [1] => B ) [type] => A ) [1] => Array ( [grade] => 2 [hobbies] => Array ( [0] => A ) [type] => A ) [2] => Array ( [grade] => 3 [hobbies] => Array ( [0] => C ) [type] => B ) ) 1

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