PHP while loop executes a set of statements as long as a condition is true.

It requires relevant variables to be ready such as an indexing variable to iterate through a loop.

A while loop checks if the specified condition is true after each iteration. .

Glossary:

<?php
$counter = 0;
while ($counter < 10)
{
	$counter += 1; // Increment By One
	echo "Executing - counter is $counter.\n"; // Print Outpur
}
?>

Explanation:

1. Loop starts when the variable $counter is set to zero.
2. For the first iteration of the loop, the variable $counter is incremented by one.
3. For the second iteration of the loop, the variable $counter is incremented by one to become two.
4. For the third iteration of the loop, the variable $counter is incremented by one to become three.
5. For the fourth iteration of the loop, the variable $counter is incremented by one to become four.
6. For the fifth iteration of the loop, the variable $counter is incremented by one to become five.
7. For the sixth iteration of the loop, the variable $counter is incremented by one to become six.
8. For the seventh iteration of the loop, the variable $counter is incremented by one to become seven.
9. For the eighth iteration of the loop, the variable $counter is incremented by one to become eight.
10. For the ninth iteration of the loop, the variable $counter is incremented by one to become nine.
11. The tenth and final iteration of the loop, the variable $counter is incremented by one to become ten which is no less than the condition statement ($counter < 10).

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References:

• Learning PHP