PHP allows us to create various elements and functions, which are used several times in many pages. It takes much time to script these functions in multiple pages. Therefore, use the concept of file inclusion that helps to include files in various programs and saves the effort of writing code multiple times.
"PHP allows you to include file so that a page content can be reused many times. It is very helpful to include files when you want to apply the same HTML or PHP code to multiple pages of a website." There are two ways to include file in PHP.
Include():If a.php is a php script calling b.php with include() statement, and does not find b.php, a.php executes with a warning, excluding the part of the code written within b.php
Syntax:
include 'filename'; or include ('filename')
and
require 'filename'; or require ('filename')
Let understand with example ,There are two php files ( my_inlclude.php ) and (myfile.php)
File1 : my_include.php:
<?php
$sports1 = "football";
$sports2 = "cricket";
?>
File2 : File myfile.php, which includes my_include.php :
<?php
include('my_include.php');
echo "I prefer ". $sports1 ." than ". $sports2;
?>
Output :
require (): The require statement is also used to include a file into the PHP code.. On failure it produce a fatal E_ERROR level error.
For Example :
The welcome.php file is not available in the same directory, which we have included. So, it will produce a warning about that missing file but also display the output.
<?php
echo "HELLO";
//require welcome.php file
require("welcome.php");
echo "The welcome file is required.";
?>
Output :
output.png)