Lesson 23 | PHP do…while Loop 2026 | Run Code at Least Once (Beginner Guide)
In this lesson, you’ll learn how to use the do…while loop in PHP — a special loop that guarantees your code runs at least once before checking the condition.
You’ll discover:
The syntax of a do…while loop (do { … } while(condition);) and how it differs from a regular while or for loop.
Why do…while is useful when you need first execution, then repeated checks (e.g. reading input or retry operations).
Example use cases: counters that always start, input validation loops, retry mechanisms, or actions that must happen before condition checks.
Best practices: ensuring loop variables or conditions change inside the loop to avoid infinite loops, and using do…while only when the logic calls for “execute first, then check.”
This video helps you understand loops better and shows when do…while shines — all explained clearly and visually, ideal for beginners in PHP.
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