3.4.1 While Loop

The PHP while Loop

The while loop executes a block of code as long as the specified condition is true.

Syntax

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

Examples

The example below displays the numbers from 1 to 5:

Example 1: PHP Loops - The PHP while Loop part 1

<?php
$x = 1;

while($x <= 5) {
  echo "The number is: $x <br>";
  $x++;
}
?>

Example Explained

• $x = 1; - Initialize the loop counter ($x), and set the start value to 1
• $x <= 5 - Continue the loop as long as $x is less than or equal to 5
• $x++; - Increase the loop counter value by 1 for each iteration

This example counts to 100 by tens:

Example 2: PHP Loops - The PHP while Loop part 2

<?php
$x = 0;

while($x <= 100) {
  echo "The number is: $x <br>";
  $x+=10;
}
?>

Example Explained

• $x = 0; - Initialize the loop counter ($x), and set the start value to 0
• $x <= 100 - Continue the loop as long as $x is less than or equal to 100
• $x+=10; - Increase the loop counter value by 10 for each iteration