Basic implode foreach

Question

I have the following code of which I want to echo array elements separated by commas. The code outputs the disered list, but without commas. What am I missing?

<?php 
    $array    = get_field('casts');
    $elements = $array;

    foreach($array as $key => $value) {
        echo implode(', ', $value)};
?>

EDIT 1: where $elements are nested arrays.

EDIT 2: Working snippet:

<?php 
    $array = get_field('casts');
    $new_array = array();
    foreach($array as $sub_array) {
        foreach($sub_array as $value) { 
            array_push($new_array, $value);
        }
    }
    echo implode(", ", $new_array);
?>

Answer 1

Why are you assigning $elements = $array; and then never using $elements?

Also you don't need to loop (foreach) to implode an array.

Try this:

<?php
$array = get_field('casts');
$new_array = array();
foreach($array as $sub_array) {
    foreach($sub_array as $value) {
        // this array_push() function adds $value to the end of $new_array.
        array_push($new_array, $value);
    }
}
echo implode(", ", $new_array);
?>

Here is the documentation on implode()

You can play around and test the above code here.

Also next time, add the tag php, otherwise our codes won't get color syntax.