The while Construct
The while construct creates a loop that executes as long as
the condition evaluates to true. The condition is checked before each iteration.
If the condition is false from the very beginning, the loop will not execute even once.
Syntax
while (condition) {
// code to be executed
}
Example
Let's output numbers from 1 to 5:
<?php
$i = 1;
while ($i <= 5) {
echo $i;
$i++;
}
?>
Code execution result:
12345
Example
Processing array elements:
<?php
$arr = [1, 2, 3, 4, 5];
$i = 0;
while ($i < count($arr)) {
echo $arr[$i] * 2;
$i++;
}
?>
Code execution result:
246810
Example
Infinite loop:
<?php
while (true) {
// infinite loop
}
?>
This code will run indefinitely until it is forcibly stopped.
