PHP Functions
There are two types of functions in PHP. The built-in function and the User defined (custom) function.
a. Built-in functions: PHP has thousands of built-in functions some of which we have been using since, for example the echo or print, date, array, mail, math, msqli, strings etc.
Date funtion example
<?php
print date('h:i:s - d/m/Y');
?>
Output
Current time and date
09:28:09 - 27/06/2022
pi() math funtion example
<?php
print pi();
?>
Output
3.14159265359
b. Custom function: or user-define function as the name suggest, user-define function are function you create to solve a particular problem or execute a task that occurs severally, this save you from the time or effort required to rewrite such code. So you create such function once and call it whenever you need.
Example
<?php
//create a funtion
function WelcomeMsg(){
echo "Welcome to my site";
}
//call the function
WelcomeMsg();
?>
Output
Welcome to my site
Example returning values
<?php
//create a funtion with parameters
function AddNum($x, $y){
return $x+$y;
}
//call the function
echo AddNum(200,700);
?>
Output
900
Next »