PHP do while Loop

In this lesson, you will learn about the PHP do while loop, the difference between it and the while loop, and examples to understand the topic better.

PHP do While

In the do-while loop, the code block is run at least once before assessing the condition. The do…while loop continues to run until the condition is false.

Syntax of do while Loop

do {
code to be processed here;
} while (condition is true);

do while Loop Flowchart

Example

<?php
echo "PHP ***do-While loop*** Example";
echo "<br>";
echo " ------------do-while loop ------------------ ";
echo "<br>";
echo "The table of 2 ";
echo "<br>";
$var = 1;
do {
    $evennumber = 2 * $var;
    echo "2 * $var is $evennumber <br/>";
    $var++;
}
while ($var <= 10)
?>

Output

PHP ***do-While loop*** Example
------------do-while loop ------------------
The table of 2
2 * 1 is 2
2 * 2 is 4
2 * 3 is 6
2 * 4 is 8
2 * 5 is 10
2 * 6 is 12
2 * 7 is 14
2 * 8 is 16
2 * 9 is 18
2 * 10 is 20

PHP while Vs. do while Loop Statement

The while loop evaluates the condition at the beginning of each iteration; if the condition is false, the loop will exit and never execute the code. Regardless of the condition, the loop will always execute at least once in the do-while loop. The loop will stop running once the condition is evaluated to be false.

This concludes the PHP do while Loop lesson. In the next lesson, you will learn about two essential keywords that we use with loops, the break and continue.