<?php $my_array = array( 0 => array( "name" => "john", "id" => 4 ), 1 => array( "name" => "mark", "id" => 152 ), 2 => array( "name" => "Eduard", "id" => 152 ) ); $needle = 152; $keys = []; foreach ($my_array as $key => ['id' => $id]) { if ($needle === $id) { $keys[] = $key; } } var_export($keys);
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