php when to use foreach code example

Example 1: loop through php array

foreach (array_expression as $value)
    statement
foreach (array_expression as $key => $value)
    statement

Example 2: for each php

<?php
$array = [
    [1, 2],
    [3, 4],
];

foreach ($array as list($a, $b)) {
    // $a contains the first element of the nested array,
    // and $b contains the second element.
    echo "A: $a; B: $b\n";
}
?>