Web Reference: 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. Functions ¶ Table of Contents ¶ User-defined functions Function parameters and arguments Returning values Variable functions Internal (built-in) functions Anonymous functions Arrow Functions First class callable syntax Nov 28, 2025 · A function in PHP is a self-contained block of code that performs a specific task. It can accept inputs (parameters), execute a set of statements, and optionally return a value. PHP functions allow code reusability by encapsulating a block of code to perform specific tasks.
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