There are times where you need to loop through a large array and manipulate the items in the array. This is what you usually do.
- List through items
- Create a temp array which contains the modified values
- Exit the loop and re-assign the new array back to the actual array.
This works fine, other than there are some problems with that.
- You need to create a temp array
- Make sure you assign it back to the original array (People make mistakes of not doing that assignment)
So here’s a simpler more easy way to handle this.
$items= array('key1' => 1, 'key2' => 12, 'key3' => 3);
foreach($items as $item => &$value) {
$value += 20;
print "$item: $value";
}
var_dump($items);
Note that the $value is assigned a reference, so it doesnt work on a copy of the value but the actual value and hence it retains its value even after exiting the loop. Saw this snippet in symfony so thought it was worth mentioning.
