Lopping array in PHP

<?php


$numbers = array(10,20,30,40);

/**
 *
 * Fetch array with for loop
 */
/**for($i=0; $i<4; $i++){
    echo "{$numbers[$i]}<br />\n";
} **/


/***
 * Fetch array with foreach loop
 * Foreach loop is specially develope for array
 */

/**foreach($numbers as $number){
echo $number . "<br />\n";
} **/


/****
 * Extract $key and $value in foreach loop from array
 */

/**foreach($numbers as $key => $value){
echo "Key: {$key}, Value: {$value}<br />\n";
} **/


/***
 * Fetch array with while loop
 */
/***
 $i = 0;
while($i<4){
    echo "{$numbers[$i]}<br />\n";
    $i++;
}
 *
 * **/
$i = 0;
do{
    echo "{$numbers[$i]}<br />\n";
    $i++;
}while($i<4);