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 …

Type declarations can be added to function arguments, return values, as of PHP 7.4.0, class properties, and as of PHP 8.3.0, class constants. They ensure that the value is of the specified …

PHP supports passing arguments by value (the default), passing by reference, and default argument values. Variable-length argument lists and Named Arguments are also supported. …

Apr 12, 2025 · A function is declared by using the function keyword, followed by the name of the function, parentheses (possibly containing parameters), and a block of code enclosed in curly …

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.

User-defined functions. A function is defined using the function keyword, a name, a list of parameters (which might be empty) seperated by commas (,) enclosed in parentheses, …

Return type is declared using a colon, followed by return type. For example : function foo () : int { return 0; } According to PHP Manual, you can do that for array on PHP 5.1 and beyond and for …

Nov 23, 2009 · it's good practice to declare functions before calling them. It'll prevent infrequent misbehavior from your code. The sample is basically a valid function definition (meaning it …

Dec 4, 2022 · Type declarations are a way to tell the PHP interpreter that a function argument should be of a certain type and that the function should return a value of a certain type. For …

Aug 19, 2022 · function function-name() { statement 1 : statement 2 : statement 3 : ..... } Elements of a function. function: A function declaration starts with the special word 'function'. Name of …