php foreach in foreach code example

Example 1: php foreach

$arr = ['Item 1', 'Item 2', 'Item 3'];

foreach ($arr as $item) {
  var_dump($item);
}

Example 2: foreach php

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

Example 3: for each php

<?php
foreach (array(1, 2, 3, 4) as &$value) {
    $value = $value * 2;
}
?>