Looping an array? Do it the foreach way

Last Updated on: February 11, 2023

As an example, if you have an array of users with an ID field as the key and the username as the value, such as:

$arr = array (
    566 => 'monkeybrains',
    891 => 'bananaface,
    4459 => 'treehugger'

You may want to perform an action on or with each of these array elements. If the array is assigned to the value $users you can loop through easily and logically as follows:

foreach ($users as $user_id => $user_name) {
    echo "$user_name has user_id $user_id";

Doing it this way makes the most sense to me and flows better in the code. In some examples, I have seen programmers use the key of each array sequentially, so as to be able to loop the array in a for loop, such as:

for ($i=0; $i < sizeof($users); $i++) { 
    echo $users[$i]." has user_id $i";

For me, this is cumbersome and does not read very well. It relies on your keys being ordered 0,1,2,3 … etc. and to format them this way would take more logic and checks.

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