PHP While Loops
Welcome! In this section we going to cover the use of while loops in PHP.
 | Click on a Topic [ Hide ] |
While Loops
Just like the for loop, while loop is used to execute a block of code for certain number of times until the condition in the while evaluate to true.
| Learn PHP and MySQL fast! | ||
|
Learn how you can start building rich interactive database driven sites like a professional developer easily and quickly... >> Order your copy now for just $39.95 << |
|
While Loop Syntax
while(condition)
{
//execute block of code
}
PHP While Loop
Example - Print number through 1 to 5 with PHP While Loop
Example below prints integers through 1 to 5
<?php
$i = 1;
while ($i <= 5 )
{
echo $i . "<br>";
$i = $i + 1;
}
?>
In the above example, you see that the loop is run until the value of $i is less than or equal to 5 according to the condition in the loop. The $i = $i + 1; statement increments the value of $i by 1 on each iteration of our while loop.
Example - Print decimal number through 1.0 to 5.0 with PHP While Loop
Here is another example with decimal numbers.
Example below prints decimal numbers through 1.0 to 5.0
<?php
$i = 1.0;
while ($i <= 5.0 )
{
printf("%.1f<br>", $i);
$i = $i + 1.0;
}
?>
Breaking out of a PHP Loop
We can use the break; statement to stop the loop from executing.
Sometimes when we are working with loops, we want to break the loop when a certain condition is true.
For example, we might want to break our loop when $i reaches 4. Lets look at the example below.
<?php
$i = 1;
while ($i <= 5 )
{
if($i == 4)
break;
echo $i . "<br>";
$i = $i + 1;
}
?>
In the above example, we break the loop when $i reaches 4. The loop outputs...
1
2
3
From HTML to PHP programming...
Learn how to build websites in PHP
| << PHP For Loop | Top | PHP Functions >> |