I want to iterate ArrayCollection instance in Symfony2 Controller, What is the easiest way?
edit:
I thought it would work like normal array in php but I got error on this code:
foreach ($arrayCollectionInc as $Inc) {
}
3 Answers
To those who find this question in the future there is another way that I would consider to be a better practice than the accepted answer, which just converts the ArrayCollection to an array. If you are going to just convert to an array why bother with the ArrayCollection in the first place?
You can easily loop over an ArrayCollection without converting it to an array by using the getIterator() function.
foreach($arrayCollection->getIterator() as $i => $item) {
//do things with $item
}
3 Comments
Tofandel
This should be considered best practice.
Ascherer
Why exactly? ArrayCollection implements IteratorAggregate. You should just foreach the array collection
pmishev
One difference I found is that if you don't use getIterator() and you do
$arrayCollection->key() inside the loop, you always get 0. But of course you can just do as $i => $item and you'll have your key without the need to call key().Simplest way:
$arr = $arrayCollectionInc->toArray();
foreach ($arr as $Inc) {
}
Working example:
$a = new ArrayCollection();
$a->add("value1");
$a->add("value2");
$arr = $a->toArray();
foreach ($arr as $a => $value) {
echo $a . " : " . $value . "<br />";
}
Result:
0 : value1
1 : value2
Comments
Definitely agree one shouldn't convert to an array, however, ->getIterator() isn't necessary.
foreach($arrayCollection as $i => $item) {
//do things with $item
}
1 Comment
Seb
Have managed doing something like foreach($arrayCollection as $item) {// do something with $item} and it works just fine. Is there a performance difference that I'm missing, or an error I haven't encountered so far?
foreach($collection as $item){ ... }ArrayCollectionextendsCollectionwhich in turn implementsIteratorAggregateandArrayAccess--->foreachshould be possible...