how can i use forEach in php code example

Example 1: foreach loop array php

foreach (array as $value){ 
  //code to be executed; 
  print("value : $value");
} 

foreach (array as  $key => $value){ 
  //code to be executed; 
  print("key[$key] => $value");
}

Example 2: for each php

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