PHP include and Require statements

Source: Internet
Author: User

PHP include and Require statements

With the include or require statement, you can insert the contents of a php file into another PHP file (before the server executes it).

The Include and require statements are the same, in addition to error handling:

    • Require generates a fatal error (E_COMPILE_ERROR) and stops the script
    • Include only generates a warning (e_warning), and the script continues

Therefore, if you want to continue execution and output the results to the user, use include if the included file is missing. Otherwise, in framework, CMS, or complex PHP application programming, always use require to reference critical files to the execution stream. This helps improve the security and integrity of your application in the event that a critical file is accidentally lost.

The inclusion of files saves a lot of work. This means that you can create a standard header, footer, or menu file for all pages. Then, when the page header needs to be updated, you only need to update the header include file.

include ' filename ';


require ' filename ';

PHP include vs. require

The Require statement is also used to refer to a file in PHP code.

However, there is a huge difference between include and require: If a file is referenced with an include statement and PHP cannot find it, the script will continue to execute.


Please use require at this time: when the file is requested by the application.

Use include at this point: when the file is not required, and the application should continue to run when the file is not found.

PHP include and Require statements

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