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 The for loop repeats a segment of code a specific number of times, while the while loop repeats a segment of code an unknown number of times. The while loop works differently than the for loop.

Syntax:

while(condition){
  // execute this code;
  // your code here
}

Example of while loop

<?php
$num = 0;

while($num < 25){
    $num = $num + 5;
    print $num . "<br />";	
}
?>

Output:

The above code will produce the following result-

5
10
15
20
25

In the above code, a variable named num is initialized with the value of 0. The condition in the while loop is that while num is less than 25, 5 should be added to num. Once the value of num is greater than 25, the loop will stop executing.

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