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PHP While Loop


PHP While Loop is a loop statement which can be used in various forms to execute a block of code continuously as long as the condition of the loop is true, and stops only when the condition fails. These are:

While Loop :
While loop is used to execute a group of action as long as the specified condition is true.

Syntax:

while (condition)
{
	code to be executed if the condition is true;
}

Nested While Loop :
Nested While loop is While loop inside a While loop and so on which is used to run multiple loop conditions.
Syntax:

while (condition)
{
	while (condition)
	{
		code to be executed if the condition is true;
	}
}

Example 1: Example of While loop

<!DOCTYPE html>
<html>
<body>
 
<?php  
while($i <= 20)
 {
  	echo "The number is: $i <br>";
	i++;
}
?>  
 
</body>
</html>

Output

The number is: 0
The number is: 1
The number is: 2
The number is: 3
The number is: 4
The number is: 5
The number is: 6
The number is: 7
The number is: 8
The number is: 9
The number is: 10
The number is: 11
The number is: 12
The number is: 13
The number is: 14
The number is: 15
The number is: 16
The number is: 17
The number is: 18
The number is: 19
The number is: 20

Example 2: Example of Nested While loop

<!DOCTYPE html>
<html>
<body>
 
<?php  
$i =0;
 
while($i <= 2)
{
$j =0;
while($j <= 5)
{
$sum = $i +$j;
echo "$sum<br>";
$j++;
}
echo "<br>";
$i++;
}
?>  
 
</body>
</html>

Output

0
1
2
3
4
5
 
1
2
3
4
5
6
 
2
3
4
5
6
7
Posted in PHP   
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