How to add functions in php

How to add a function in php: 1. Create a PHP sample file; 2. Create a function through "function functionName(){...}".

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

How to add functions to php?

Creating PHP functions:

Functions are executed by calling functions.

Syntax

PHP function guidelines:

The name of the function should indicate its function

The function name starts with a letter or underscore (not a number Beginning)

Example

A simple function that outputs my name when called:

Example

Output:

My name is Kai Jim Refsnes

PHP Function - Adding Parameters

In order to add more functions to the function, we can add parameters, which are similar to variables.

The parameters are specified within a bracket after the function name.

The following example will output different names, but the surname is the same:

Example

"; } echo "My name is "; writeName("Kai Jim"); echo "My sister's name is "; writeName("Hege"); echo "My brother's name is "; writeName("Stale"); ?>

Output:

My name is Kai Jim Refsnes. My sister's name is Hege Refsnes. My brother's name is Stale Refsnes.

Recommended learning:《PHP video tutorial》

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