Php include vs require

The include expression includes and evaluates the specified file. The documentation below also applies to require. For example, if a filename begins with.

As we know PHP allows us to create various functions and various elements that are used multiple times in multiple pages. This can be avoided if we follow and use the concept of file inclusion which helps us to include various files including text or codes into a single program which saves the effort of writing the full function or code multiple times. This also provides another advantage. If we want to change any code then instead of editing it in all the files, we just need to edit the source file and all codes will be automatically changed. There are two functions that help us to include files:.

Php include vs require

Including a file produces the same result as copying the script from the file specified and pasted into the location where it is called. You can save a lot of time and work through including files — Just store a block of code in a separate file and include it wherever you want using the include and require statements instead of typing the entire block of code multiple times. A typical example is including the header, footer and menu file within all the pages of a website. The basic syntax of the include and require statement can be given with:. Tip: Like the print and echo statements, you can omit the parentheses while using the include and require statements as demonstrated above. The following example will show you how to include the common header, footer and menu codes which are stored in separate 'header. Using this technique you can update all pages of the website at once by making the changes to just one file, this saves a lot of repetitive work. You might be thinking if we can include files using the include statement then why we need require. Typically the require statement operates like include. The only difference is — the include statement will only generate a PHP warning but allow script execution to continue if the file to be included can't be found, whereas the require statement will generate a fatal error and stops the script execution. Tip: It is recommended to use the require statement if you're including the library files or files containing the functions and configuration variables that are essential for running your application, such as database configuration file. If you accidentally include the same file typically functions or classes files more than one time within your code using the include or require statements, it may cause conflicts. These statements behave in the same way as include and require statements with one exception. To better understand how it works, let's check out an example.

During this process if there are any kind of errors then this include function will pop up a warning but unlike the require function, it will not stop the execution of the script rather the script will continue its process. The php include vs require function will stop the execution of the script when an error occurs.

Include in PHP helps one build various functions and elements that can be reused through several pages. Scripting the same feature through several pages takes time and effort. This can be avoided if we adopt and use the file inclusion principle, which allows us to combine several files, such as text or codes, into a single program, saving time and effort. PHP Include helps to include files in various programs and saves the effort of writing code multiple times. If we want to change a code, rather than editing it in all of the files, we can simply edit the source file, and all of the codes will be updated automatically.

In this tutorial, we are going to see the list of functions used in PHP to include an external file into a program. PHP provides various functions including external files. It is required if the current code dependency is on the external file to be included. For example, if we want to create an instance of a class defined in a separate class file, then it has to be included before creating an instance of it. The following list of functions is used to include an external file in a PHP program. In this tutorial, we are going to compare these functions with suitable examples. It accepts the external file path and checks if the file exists or not. If the file does not exist in the specified path, then the include will return a PHP warning.

Php include vs require

The include expression includes and evaluates the specified file. The documentation below also applies to require. For example, if a filename begins with..

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The terms "include" and "require" are interchangeable. The require function is mostly used when the file is mandatory for the application. Templates We have created a bunch of responsive website templates you can use - for free! When a file is included, parsing drops out of PHP mode and into HTML mode at the beginning of the target file, and resumes again at the end. Share your suggestions to enhance the article. As an example, think of mistakenly using an incorrect path for your database configuration file in the code. A typical example is including the header, footer and menu file within all the pages of a website. Use require when the file is required by the application. As a rule of thumb, never include files using relative paths. Like Article. Article Tags :. We discussed the difference between the two and talked about how using to require might be a better option as compared to include.

In the world of web development, PHP Hypertext Preprocessor stands as a robust and versatile scripting language, powering a significant portion of the web. One of its most powerful features is the ability to include external files using the include and require functions. These functions might appear simple on the surface, but they hold incredible potential for enhancing code organization, modularity, and reusability.

Also, it's possible to return values from included files. Difference between require and include in PHP. Templates We have created a bunch of responsive website templates you can use - for free! HTML Examples. Then you could create a bunch of different web-pages that include or require these children components. How to remove duplicate values from array using PHP? Example 4 Comparing return value of include. Explore offer now. Submit your entries in Dev Scripter today. In the Main. The core idea is that even though errors are bad for users, they are quite essential for developers to take heed of inaccuracies in their code. So, if you want the execution to go on and show users the output, even if the include file is missing, use the include statement. Suggest changes. Related Articles.