A while loop repeats a certain block of code as long as a certain condition is true. As soon as it is not, it stops repeating that block of code.

You simply set a certain condition and this is tested at the top of the loop. The general format is:

while(certain condition)

{

execute this code;

}

Example:

$price = 5;

while ($price <= 10 )

{

echo "Still cheap";

$price++;

}

We set our variable $price with a start value of 5. We test to see if $price is less than or equal to 10. If it is, we echo Still cheap and the $price++ increments the $price by 1 (ie. $price + 1 making $price now 6). The loop then checks if $price is less than or equal to 10. If it is (it is in this case as $price is now 6) we echo Still cheap and the $price++ increments the $price by 1 (ie. $price + 1 making $price now 7).

This loop continues until $price is less than or equal to 10. Meaning, if it is 11, then the loop stops executing the code {between braces}.