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array_intersect_ukey() function in PHP

The array_intersect_ukey() function used for compares the keys of two or more arrays, and returns the common elements.

Note-use a user-defined function to compare the keys




function yourfunction($a, $b){
    if ($a === $b) {
        return 0;
    return ($a > $b)? 1:-1;

$array1 = array("a"=>"red","b"=>"green","c"=>"blue");
$array2 = array("d"=>"red","b"=>"green","e"=>"blue");



Array ( [b] => green )

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