do-while

do-while

loops are very similar to loops, except the truth expression is checked at the end of each iteration instead of in the beginning. The main difference from regular loops is that the first iteration of a loop is guaranteed to run (the truth expression is only checked at the end of the iteration), whereas it may not necessarily run with a regular loop (the truth expression is checked at the beginning of each iteration, if it evaluates to false right from the beginning, the loop execution would end immediately). do-while``while``while``do-while``while

There is just one syntax for loops:

`do-while````php

   The above loop would run one time exactly, since after the first
   iteration, when truth expression is checked, it evaluates to
   false ( is not bigger than 0) and the loop
   execution ends.
 `$i`


  Advanced C users may be familiar with a different usage of the
   loop, to allow stopping execution in
  the middle of code blocks, by encapsulating them with
   (0), and using the 
  statement.  The following code fragment demonstrates this:
  
 `do-while``do-while`break```php
<?php
do {
    if ($i < 5) {
        echo "i is not big enough";
        break;
    }
    $i *= $factor;
    if ($i < $minimum_limit) {
        break;
    }
    echo "i is ok";

    /* process i */

} while (0);
?>

It is possible to use the

operator instead of this hack. goto