The difference between include and require in PHP

The main focus is on red tagged statements.

The include (or require) statement takes all Text/code/markup this exists in the specified file and copies it into the File that uses the include statement.

Including the files are very useful when you are want to include the same PHP, HTML, or text on multiple pages of a website.

PHP include and require statements

It is possible to inserts the content of one PHP file into another PHP file (before the server executes it), with the INCLU De or require statement.

the include and require statements are identical except upon failure:

Require would produce a fatal error (E_COMPILE_ERROR) and stop the scriptinclude'll only produce a warning (e_warning) a d The script would continue

So, if you are want the execution to go in and show users the output, even if the include file is missing, use the include STA Tement. Otherwise, in case of FrameWork, CMS, or a complex PHP application coding, always with the require statement to include a K EY file to the flow of execution. This would help avoid compromising your application "s security and integrity, just in-case one key file is accidentally mis Sing.

Including files saves a lot of work. This means can create a standard header, footer, or menu file for all your Web pages. Then, when the header is needs to is updated, you can only update the header include file.

Syntax

Include " filename";

Or

Require " filename";
PHP include examples

Example 1

Assume we have a standard footer file called "footer.php", that's looks like this:

-->echo "

Copyright©1999-". Date ("Y"). "W3schools.com

";
?>

To include the footer file in a page and use the Include statement:

Example




Welcome to my home page!




Some text.




Some more text.


-->



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Example 2

Assume we have a standard menu file called "menu.php":

-->echo "Home-
HTML Tutorial-
CSS Tutorial-
JavaScript Tutorial-
PHP Tutorial ";
?>

All pages in the Web site should with this menu file. Here are how it can do (we are using a element so this menu easily can styled with CSS later):

Example








Welcome to my home page!




Some text.




Some more text.





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Example 3

Assume we have a file called "vars.php" with some variables defined:

-->$color = "Red";
$car = "BMW";
?>

Then, if we include the "vars.php" file, the variables can is used in the calling file:

Example




Welcome to my home page!


-->echo "I have a $color $car.";
?>



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PHP include vs. require

The Require statement is also used to include a file into the PHP code.

However, there is one big difference between include and require; When a file was included with the include statement and PHP cannot find it, the script would continue to execute:

Example




Welcome to my home page!


-->echo "I have a $color $car.";
?>



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If We do the same example using the require statement, the Echo statement won't be executed because the script Execution dies after the Require statement returned a fatal error:

Example




Welcome to my home page!


-->echo "I have a $color $car.";
?>



Run example?


	Use require when the ' file is ' required by the application. Use include when the ' file is not ' required and application should continue when ' not ' found.