PHP Tutorial – While Loops

The PHP language has four different kinds of conditioned loops. In this PHP tutorial we will look at the “while” loop. Loops are used to execute a block of code multiple times.

In PHP, we have the following loop statements:

  • while – loop through a block of code while a specified condition is true
  • do…while – loops through a block of code once, and then repeats the loop as long as a specified condition is true
  • for – loops through a block of code a specified number of times
  • foreach – loops through a block of code for each element in an array

Syntax


while (condition)
{
  code that will be executed;
}

while loop Example

Ok, let’s look at an example:


<html>
<body>

<?php
     $x=0;
     while($x<=5)
     {
            echo "The number is " . $x . "<br />";
            $x++;
     }
?>

</body>
</html>

First we set X to 0. Then we enter the loop with; X less or equal to 5. As long as this is true the number will be printed. At the end of the loop we increment X. The loop until X is false (has the number 6.)

So the output of our example will be:


The number is 0
The number is 1
The number is 2
The number is 3
The number is 4
The number is 5

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