Otherwise, in case of FrameWork, CMS, or a complex PHP application coding, always use the require statement to include a key file to the flow of execution. This will help avoid compromising your application's security and integrity, just in-case one key file is accidentally missing. Including files saves a lot of work. This means that you can create a standard header, footer, or menu file for all your web pages. Then, when the header needs to be updated, you can only update the header include file.
To include the footer file in a page, use the include statement:. All pages in the Web site should use this menu file. If you include a text file, it will show as text in the document. Also, normally parentheses are not put after include , like this: include 'test. Improve this answer.
In your example, it behaves exactly like copy and paste. Paul - No, it doesn't. No, it's a. Change the extension. To return an array from a file is what a lot of frameworks do for file based array lists like configuration files. Show 12 more comments. No files are changed or anything. Niko Niko So just something to remember there. Sammaye Sammaye Include does not behave like copy paste. Mohammad Daud Ibrahim Mohammad Daud Ibrahim 1 1 gold badge 2 2 silver badges 13 13 bronze badges.
Example 3 include through HTTP. Remote file may be processed at the remote server depending on the file extension and the fact if the remote server runs PHP or not but it still has to produce a valid PHP script because it will be processed at the local server. If the file from the remote server should be processed there and outputted only, readfile is much better function to use. Otherwise, special care should be taken to secure the remote script to produce a valid and desired code.
See also Remote files , fopen and file for related information. Successful includes, unless overridden by the included file, return 1. It is possible to execute a return statement inside an included file in order to terminate processing in that file and return to the script which called it. Also, it's possible to return values from included files. You can take the value of the include call as you would for a normal function. This is not, however, possible when including remote files unless the output of the remote file has valid PHP start and end tags as with any local file.
You can declare the needed variables within those tags and they will be introduced at whichever point the file was included. Because include is a special language construct, parentheses are not needed around its argument.
Take care when comparing return value. Example 4 Comparing return value of include. Example 5 include and the return statement.
Notice the difference between the above examples. The first uses return within the included file while the other does not. If there are functions defined in the included file, they can be used in the main file independent if they are before return or after. If the file is included twice, PHP will raise a fatal error because the functions were already declared. Another way to "include" a PHP file into a variable is to capture the output by using the Output Control Functions with include.
For example:. Example 6 Using output buffering to include a PHP file into a string. Note : Because this is a language construct and not a function, it cannot be called using variable functions. You can see in the following image. When we execute this script then they will not execute and produces a warning and fatal error. Conclusion So in this article you saw the difference between the include and require functions in PHP.
Using this article one can easily understand the include and require functions in PHP. View All. Vineet Kumar Saini Updated date May 28, First of all we create a PHP file. In the above example we used the include function, in which we called a PHP file csharp.
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