PHP Function - Concepts, Varieties of Usage, Examples

PHP function has been explained. Different usages are discussed with examples. The topics and their timelines are described below. PHP in-built functions: https://www.php.net/manual/en/indexes.functions.php Timeline: 0:00 Intro 0:23 Concepts with examples 2:06 PHP Built-in Functions 2:47 PHP User-defined Functions 3:11 PHP Function Arguments 6:08 PHP Default Argument Value 7:44 PHP is a Loosely Typed Language 8:33 PHP Functions - Returning Values 8:53 PHP Return Type Declarations 10:51 Passing Arguments by Reference 12:54 Scope of Function 13:30 Variable Function 14:29 Anonymous Function 15:02 Arrow Functions 15:25 Outro