A Complete Picture of PHP Function In a
                     A COMPLETE PICTURE OF PHP 
FUNCTION IN A PHP COURSE
PHP COURSE
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PHP COURSE
 Introduction
• What is a PHP function? Defined in a PHP course
• What is the role of PHP functions in PHP development covered in a PHP 
course?
• What are the two types of PHP functions covered in a PHP course?
• PHP Developers should pay attention to these pointers: covered in a PHP 
course
• How many functions does PHP have?
• What are the different examples of PHP functions? Covered in a PHP course
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 What is a PHP function? Defined in a PHP course
• A PHP course could tell you that PHP function is defined as a function that 
gives code that a PHP script can call to perform a task, such as Count(), file_ 
get contents(), and header(). 
• This language backs both procedural and object-oriented paradigms. 
 
• Furthermore, In the procedural space, functions are a key pillar for 
developing and maintaining streamlined applications.
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 What is the role of PHP functions in PHP development covered in a PHP 
course?
• A PHP course would explain about the role of PHP functions in PHP 
development. Let’s give an outline here:
• When a developer applies PHP functions to the development, it aids to 
reorganize development by:
• Creating a modular development approach.
• Make available logic that is reusable by other PHP applications. 
• Removing the necessity to re-develop and re-write the same logic repeatedly.
 
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 What are the two types of PHP functions covered in a PHP course?
There are two types of PHP functions. They are covered in a PHP course. They are:
• Built-in PHP functions:  These Built-in PHP functions ship with PHP runtimes and their 
extensions — and they can be called from anywhere in a script (for example, print (), var 
dump (), MySQL connect (), etc.).
• User-defined functions are customized functions that are created by the developer
 
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 PHP Developers should pay attention to these pointers: covered in a 
PHP course
• A PHP course would tell developers that irrespective of a function being 
built-in or user-defined:
• Calling functions must always start with the keyword function.
• PHP code must be limited within curly brackets {}.
• Functions can be called by name, later by arguments within parentheses.
• Function names must start with a letter or underscore — not a number.
• A name of functions with an underscore is set aside for super global 
variables that contain information such as session and cookie data.
• Their names are not case sensitive.
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 How many functions does PHP have?
• A PHP course would tell you that PHP has more than 700 functions which 
can be used for different tasks. 
 What are the different examples of PHP functions? Covered in a PHP 
course
• Here are some PHP function examples covered in a PHP course:
• Definitions and Attributes
• Optional Arguments
• Variable Scoping
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• Variables as Reference
• Recursion
• Anonymous Functions
• New Anonymous Function Syntax in PHP 7.4
• To conclude, these were some of the various aspects regarding PHP 
functions which will be covered in a  PHP training
 
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