How to loop through multiple arrays at the same time (parallel)

Question

Oke so I don\'t know why this is so hard, all information I find is only for two arrays like array_combine.

I have 3 arrays that I get from dynamically created input fie

Answer 1

If you are sure that for each item information is under one and the same key in all arrays, you can do following:

$article_id = $_REQUEST['article_id'];
$article_descr = $_REQUEST['article_descr'];
$article_ammount = $_REQUEST['article_amount'];

foreach ($article_id as $id => $value) {
    echo 'Article id: ' . $value . '<br>';
    echo 'Article description: ' . $article_descr[$id] . '<br>';
    echo 'Article ammount: ' . $article_ammount[$id] . '<br>';
}

Answer 2

Since you said that all arrays match by their keys, I will assume you have something like this:

$article_ids = [10, 22, 13];
$article_descriptions = ["this is one", "this is two", "this is three"];
$article_amounts = [20, 10, 40];

Therefore in order to obtain their information in an orderly manner, you would first need to found how many elements there are. We can use the total of the first array, by using count(), then using a for loop to iterate and obtain each array's information.

//get the number of articles
$num = count($article_ids);

//iterate through each article count
for ($i = 0; $i < $num; $i++){
    echo 'Article id: '.$article_ids[$i].'<br>';
    echo 'Article description: '.$article_descriptions[$i].'<br>';
    echo 'Article amount: '.$article_amounts[$i] .'<br>';
}