foreach results in endless loop - php

Question

I have an array stored in $_SESSION:
var_dump($_SESSION['session_article']);
//result:
array(2) {
[0]=> array(2) {
["id"]=> string(1) "3"
["amount"]=> int(2)
}
[1]=> array(2) {
["id"]=> string(2) "13"
["amount"]=> int(1)
}
}
If I do:
for($artKey = 0;$artKey < count($_SESSION['session_article']);$artKey++){
$cartArt = $_SESSION['session_article'][$artKey];
//stuff that doesn't affect key or value
}
everything is fine ...but if I do:
foreach($_SESSION['session_article'] as $artKey => $cartArt){
//stuff that doesn't affect key or value
}
the page won't stop to load (infinite loading, like the foreach never terminates)

Answer 1

I would like to you know that the computer is not a dumb machine, so whenever you do not get the right result then its not the computers problem, it is in how you code.
So lets take a look at your code first you var_dump($_SESSION['session_article']) you got an array with two elements each being an associative array. Now observe that this is an array of arrays so you code in scenario 2 is wrong.
If it were to be just a single array say $myArray = ['Simon', 'Peter', 'You'] then this woul have worked fine (note I used the short array syntax here you can use array() if you prefer). But the problem is you have multidimensional Arrays so you could should be
foreach($_SESSION['session_article'], list($a,))
{
//stuffs here
}
or better walk through the $_SESSION['session_article'] as an associative array like so
$myArray = $_SESSION['session_article']
$field = count($myArray, COUNT_RECURSIVE - (int)2)
for ($record = 0; $record < $myArray.length; $record++) {
//record number
for ($field = 0; $field < $field ; $field++) {
//combine record and field here
}
}
Hope I could lend a helping hand?
Please checkout
http://php.net/manual/en/function.count.php
http://php.net/manual/en/control-structures.foreach.php
They really have a good doc, just take you time.