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Why use ctype_alnum() for string validation?
📻 ctype_alnum() checks if a string has only letters and numbers.
📻 This is useful for form validations where input must be alphanumeric.
📻 Using it helps prevent security issues like SQL injection.
📻 Many developers overlook it, but it can simplify code significantly.

In this lesson, we dive deep into the ctype_alnum() function in PHP. Learn how to effectively check if a string contains only alphanumeric characters and why this is crucial in web development. We will explore common pitfalls and provide real-world examples of how to implement this function correctly. By the end of this video, youll not only understand how ctype_alnum() works but also uncover a unique tip that could enhance your PHP applications. Dont miss out!

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