Program 1
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<?php
// $array1=array("Mon","Tue","Wed","Sat");
// $array2=array("Mon","Wed","Thus","Feb","Tue");
// $array3=array("Mon","Wed","Fri","Jan","Sat");
// $newarray=array_intersect($array1,$array2,$array3);
// print_r($newarray);
$array1=array("x"=>"Mon","y"=>"Tue","z"=>"Wed","k"=>"Sat");
$array2=array("x"=>"Mon","y"=>"Wed","z"=>"Thus","r"=>"Feb","k"=>"Sat");
//$newarray=array_intersect_key($array2,$array1);
$newarray=array_intersect_assoc($array1,$array2);
print_r($newarray);
?>
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