Web Reference: PHP already holds hundreds of built-in functions that you use in your everyday applications, but in PHP you have the ability to create your own functions. PHP has over 1000 built-in functions that can be called directly, from within a script, to perform a specific task. Please check out our PHP reference for a complete overview. In this tutorial you will learn how to define and call a custom function in PHP to save the repetition of code and make your code much easier to maintain.
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