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<?php $a=Array ( '0' => 'H', '1' => 'e', '2'=> 'l', '3' => 'l', '4' => 'o', '5' => 'W', '6' => 'o', '7' => 'r', '8' => 'l', '9' => 'd', '10' => '!' ); $b=Array ( '1' => 'e', '5' => 'W', '7' => 'r', '10' => '!' ); print_r(array_intersect_assoc ($a,$b));

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