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 …

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.

In this tutorial, you will learn about PHP functions and how to define user-defined functions.

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.

Oct 29, 2025 · In this article, we will learn how to define a PHP function and what functions are specific to PHP, such as anonymous functions and arrow functions. Finally, we will take a few examples to …

Like most of the programming languages, a function in PHP is a block of organized, reusable code that is used to perform a single, related action. Functions provide better modularity for your application …

A function receives a list of arguments separated by commas. Every argument only exists in the context of the function, meaning that they become variables inside the function block, but are not defined …

Jan 9, 2024 · By mastering the basics of function declaration, parameters, return types, and advanced concepts like recursion and namespaces, you’re now equipped to tackle a multitude of programming …

Feb 28, 2022 · In this tutorial, you will work with all the different pieces of a function, so that you can use functions in the best way to solve your challenge. We will start by writing user-defined functions.