Unsetting array values in a foreach loop [duplicate]

foreach($images as $key => $image){    if(in_array($image, array(       'http://i27.tinypic.com/29ykt1f.gif',       'http://img3.abload.de/img/10nxjl0fhco.gif',       'http://i42.tinypic.com/9pp2tx.gif',    ))    {        unset($images[$key]);    }}

Try that:

foreach ($images[1] as $key => &$image) {    if (yourConditionGoesHere) {        unset($images[1][$key])    }}unset($image); // detach reference after loop  

Normally, foreach operates on a copy of your array so any changes you make, are made to that copy and don't affect the actual array.

So you need to unset the values via $images[$key];

The reference on &$image prevents the loop from creating a copy of the array which would waste memory.

To answer the initial question (after your edit), you need to unset($images[1][$key]);

Now some more infos how PHP works:You can safely unset elements of the array in foreach loop, and it doesn't matter if you have & or not for the array item. See this code:

$a=[1,2,3,4,5];foreach($a as $key=>$val){   if ($key==3) unset($a[$key]);}print_r($a);

This prints:

Array(    [0] => 1    [1] => 2    [2] => 3    [4] => 5)

So as you can see, if you unset correct thing within the foreach loop, everything works fine.