PHP while loop is used to execute a block of code if and as long as the expression given evaluates to true.
Here is the general form to use while loop in PHP:
while(condition)
{
code to be executed here, if the condition evaluates to true;
incrementation;
}
PHP while Loop Example
Here is an example, uses while loop in PHP. This example decrements a variable value on each iteration of the while loop and the counter
increments until it reaches to 0 when the evaluation is false and the loop goes to end.
<html>
<head>
<title>PHP while Loop Example - CodesCracker</title>
</head>
<body>
<?php
$i = 25;
while($i > 0)
{
$i--;
echo $i." ";
}
echo "Fire!!!<br/>";
echo "Loop stopped at i = ".$i;
?>
</body>
</html>
It will display the following result:
Here is another example demonstrating while loop in PHP.
<html>
<head>
<title>PHP while Loop Example - CodesCracker</title>
</head>
<body>
<?php
$num = 2;
$i = 1;
while($i<=10)
{
echo $num * $i;
echo "<br/>";
$i++;
}
?>
</body>
</html>
Here is the sample output of the above while loop example code.
Below is another example in PHP demonstrates while loop.
<html>
<head>
<title>PHP while Loop Example - CodesCracker</title>
</head>
<body>
<?php
$chk = true;
$sum = 0;
$count = 0;
while($chk)
{
if($sum === 500)
{
$chk = false;
}
else
{
$sum += 10;
}
$count++;
}
$count--;
echo "Sum = ". $sum;
echo "<br>";
// below line prints the total number of time, the condition
// has been checked
// or the total number of time, program control goes
// inside the while loop block to execute its content
echo "Total number of run time = ". $count;
?>
</body>
</html>
Below is the output produced by the above example code of while loop.
PHP Online Test
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