Add new values to foreach loop from inside the loop [closed] - php

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Is possible to add new values to the array that the foreach is working with? So it will run (n+x) where n is the number of elements of the array before the foreach starts and x is the number of elements that were added to the array.
Yes, I tested.. and looks like NO.. so I'd like to know if I can do something to this work.
foreach($pages_to_visit as $key => $source){
global $products;
$links = baixarSource($source);
foreach($links as $link){
global $products;
global $pages_to_visit;
if(preg_match("/somestore\.com/i", $link)){
if(!in_array($link, $pages_to_visit)){
$pages_to_visit[] = $link;
}else if(preg_match("/\/produto\//i", $link) && !in_array($link, $products)){
$products[] = $link;
echo $link."\n";
}
}
}
unset($pages_to_visit[$key]);
sleep(0.2);
}

Answer 1

As you already figured out, using foreach() it is not possible, however when you use for() the task becomes quite easy:
for ($i=0; $i<count($array); $i++) {
//code
}
This is due to count($array) being (re)calculated before every iteration. You can also use a variable that you increment yourself (incrementing is a way easier task than counting an array)
$max = count($array);
for ($i=0; $i<$max; $i++) {
//code
//when push an element just do $max++;
}
Of course this will only work with numerical indices but that seems to be the case here.

Answer 2

You need to specify the "runner" variable as a reference in the foreach code if you want to modify the array itself from within the foreach.
http://us2.php.net/manual/en/control-structures.foreach.php
In order to be able to directly modify array elements within the loop precede $value with &. In that case the value will be assigned by reference.
Example (will only count to 9):
$arr = array(1,2,3,4,5,6,7,8,9);
$makeArrayLonger = true;
foreach ($arr as $blubb)
{
if ($makeArrayLonger)
{
$arr[] = 10;
$makeArrayLonger = false;
}
echo $blubb;
}
Example2 (this time it will count to 10 using the additional element added from inside the foreach):
$arr = array(1,2,3,4,5,6,7,8,9);
$makeArrayLonger = true;
foreach ($arr as &$blubb)
{
if ($makeArrayLonger)
{
$arr[] = 10;
$makeArrayLonger = false;
}
echo $blubb;
}

Answer 3

Not sure if I get your question right... I think what you try to do doesn't make much sense at all any way.
echo $countBefore = count($data);
foreach ($data $as $value) {
$data[] = 'Some new value';
}
echo $countAfter = count($data);