What is the use of foreach loop?

Question

it is used only for arrays?.
how does the loop works can any one explain in detail?

Answer 1

best source (with examples):

http://php.net/manual/en/control-structures.foreach.php

Answer 2

Not familiar with php but in general:

a foreach loop is a more concise way to iterate though a container of some sort (array, list, set, etc)

instead of manually initializing a counter variable and telling it how to iterate, the foreach will give you the actual item that is being looped over.

So take this example:

//iterate through a container using a for
for (int i= 0; i < container.size (); ++i){
cout << container [i] ;
}

//now the foreach
for (i : container) {
cout << i; // i will be equal to container [0] on the first iteration, then container [1] and so on
}