PHP - 如何在索引中按值取消数组索引

Question

I have an array of objects ($response) that looks like this:

Array
(
    [0] => stdClass Object
        (
            [CardNumber] => 5897853070424xxx
            [CardHolderName] => P Stoltz
            [CardHolderContactNumber] => 
            [CardHolderEmailAddress] => 
            [CardExpiryDate] => 2017-09-01T00:00:00
            [CardHolderTypeID] => 2
            [LastUsedDate] => 2017-05-25T00:00:00
        )
    [1] => stdClass Object
        (
            [CardNumber] => 589785304326xxx
            [CardHolderName] => J Stoltz
            [CardHolderContactNumber] => 
            [CardHolderEmailAddress] => 
            [CardExpiryDate] => 2017-09-01T00:00:00
            [CardHolderTypeID] => 2
            [LastUsedDate] => 2017-05-25T00:00:00
        )

)

Now, I need to unset the entire object where CardNumber != '589785304326xxx'

I have tried this:

$cardnumber = '5897853070424xxx'; 
    foreach( $response as $res )
    {
        if($res->CardNumber != $cardnumber)
        {
            unset($res);
        }
    }

This does nothing. Any suggestions?

Answer 1

What you have tried will only unset the current object in the loop. You need to do the following:

foreach($response as $key => $res) {
    if($res->CardNumber != $cardnumber) {
        unset($response[$key], $res);
        continue;
    }
}