Question

I have two arrays of objects,

They are identical except one has more items,

so they would look like

Array [arrayA]
(
    [0] => stdClass Object
        (
            [id] => 2
            [name] => interest 1
            [description] => interest one
        )

    [1] => stdClass Object
        (
            [id] => 4
            [name] => interest 3
            [description] => interest three
        )

)



Array [arrayB]
(
    [0] => stdClass Object
        (
            [id] => 1
            [name] => all
            [description] => everything
        )

    [1] => stdClass Object
        (
            [id] => 2
            [name] => interest 1
            [description] => interest one
        )

    [2] => stdClass Object
        (
            [id] => 4
            [name] => interest 3
            [description] => interest three
        )

    [3] => stdClass Object
        (
            [id] => 5
            [name] => interest 4
            [description] => interest four
        )

)

Now what I want to do is, loop over arrayB, if the object is found in arrayA (maybe compare the ID?) then set [checked] => true else set [checked] = false on arrayB.

What is the easiest way to do this?

I have thought of doing maybe

foreach($arrayB as &$obj){
    $obj->checked = false;
    foreach($arrayA as $obja){
        if($obja->id == $obj->id){
            $obj->checked = true;
            break;
        }
        if($obja->id > $obj->id) //thanks to De3pTh0ught
            break;
    }
}

But there has to be a more efficient way?

Answer 1

You could add a check to cut useless iterations. If you know that the object IDs in your arrays will always be in increasing order, you could include the condition: if $obja’s ID is greater than $obj’s ID, then break $arrayA’s foreach loop, because that means that $obj will never find a match.