Include and require in PHP

One, what is the use?

Server-side inclusions (server Side Include,ssi) are used to create functions, headers, footers, or elements that can be reused on multiple pages. The Include file reuses the file and saves a lot of work.

Second, how to use?

Include ' filename ';
Or
Require ' filename ';

1.php

   
    echo"Hello ";include'2.php';?>

2.php

    
     echo"World.";?>

In the browser access 1.php will get (note that at this point 1.php and 2.php are placed in the same folder):Hello World.

Iii. What is the difference between include and require?

In terms of 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

Please use at this time:
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.

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The above introduces the include and require in PHP, including the content, I hope that the PHP tutorial interested in a friend to help.

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