Question

Array
(
    [15,  BBC company] => Array
        (
            [147, IT Dep] => 85
            [150, HR Dep] => Array
                (
                    [58] => employee 1
                    [71] => employee 2
                )

        )

)

I would like to delete [58] => employee 1 from array The following is my code, however, it doesn’t work.

Can anyone help me? Many thanks!

foreach($arr as $key=>$value){

    foreach ($value as $subKey=>$subVal){

        foreach($subVal as $k=>$v){

            if($k==58){

                echo $k;

                unset($subVal[$k]);

            }
        }

    }

}

Expected result

Array
(
    [15,  BBC company] => Array
        (
            [147, IT Dep] => 85
            [150, HR Dep] => Array
                (
                    [71] => employee 2
                )

        )

)

Answer 1

the code must be as follows:

foreach($arr as $key=>&$value){
    foreach ($value as $subKey=>&$subVal){    
        foreach($subVal as $k=>&$v){
            if($k==58){
                echo $k;
                unset($subVal[$k]);
            }
        }
    }
}

because foreach creates a copy of the array, and you are unsetting an element of this copy. in the code above the array is passed as a reference