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 of the PHP built-in functions. Besides the built-in PHP functions, it is possible to create your own functions.

Feb 13, 2025 · Understand the fundamentals, explore various types of PHP functions, and discover common PHP functions in action. Whether you're a beginner or an experienced developer, this comprehensive exploration of PHP functions will enhance your coding skills.

May 1, 2025 · For example, strlen(), substr(), array_merge(), date() and etc are built-in PHP functions. These functions provide useful functionalities, such as string manipulation, date handling, and array operations, without the need to write complex logic from scratch.

Summary: in this tutorial, you will learn about PHP functions and how to define user-defined functions. A function is a named block of code that performs a specific task. So far, you have learned how to use built-in functions in PHP, such as var_dump() that dumps information about a …

Dec 11, 2023 · In this tutorial, we will explore the fundamentals of PHP functions, including how to create and use them effectively. To create a PHP function, you use the function keyword, followed by the function name and a pair of parentheses. The function body, where the code executes, is enclosed in curly braces. Below is the syntax to create a PHP function:

@Welbog: for example haystack = xxxyyy needle = yyy and using strrpos the search starts from the first x.Now we do not have a successful match here (found x instead of y) and we cannot go backward anymore (we're at start of string) the search fails immediately.About using !== false-- strrpos in the above example will return 0 or false and not other value.

Discover how to define and use functions in PHP for modular and reusable code. Learn about function arguments, return values, variable scope, and best practices to enhance your PHP programming skills.

Apr 12, 2022 · In this lesson, we will get acquainted with such a concept as functions in the PHP language. Functions are pretty simple things. It is a piece of code that takes certain parameters and returns some result at the output. It is possible to …

Apr 12, 2025 · Know What is PHP Functions, Creating PHP Function, PHP Functions with Parameters, Setting Default Values for Function Parameters, & Dynamic Function Calls. Read Now!

The default file extension for PHP files is ".php".A PHP file normally contains HTML tags, and some PHP scripting code. Below, we have an example of a simple PHP file, with a PHP script that uses a built-in PHP function "echo" to output the text "Hello World!"on a web page: