Php include vs require

In the realms of computer science and software engineering, reusability and modularity are considered to be important design principles to keep in mind when building software programs, php include vs require. It is therefore advocated to break down your code into several smaller, atomic parts that are independent, reusable and replaceable. This makes projects easier to debug, reduces redundancy, saves an awful lot of memory and resources, and allows for localized, cumshots on titts more stable updates. A very common example of this can be seen in any website you visit on the internet.

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.

Php include vs require

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. There are two features that assist us in incorporating files in PHP. Basics to Advanced - Learn It All! If the include statement appears, execution should continue and show users the output even if the include file is missing. Otherwise, always use the required declaration to include the main file in the flow of execution while coding Framework, CMS, or a complex PHP program. This will help prevent the application's protection and reputation from being jeopardized if one key file is corrupted. The include function copies all of the text from a given file into the file that uses the include function.

Enhance the article with your expertise. PHP require function: The require function performs same as the include function.

The include expression includes and evaluates the specified file. The documentation below also applies to require. For example, if a filename begins with.. When a file is included, the code it contains inherits the variable scope of the line on which the include occurs. Any variables available at that line in the calling file will be available within the called file, from that point forward. However, all functions and classes defined in the included file have the global scope. Example 1 Basic include example.

In this article, we will see the require and include Functions in PHP, along with understanding their basic implementation through the illustration. With this, both functions enhance the code reusability, along with breaking down large applications into smaller, more manageable parts. During this process, if there are any kind of errors then this require function will pop up a warning along with a fatal error and it will immediately stop the execution of the script. In order to use this require function, we will first need to create two PHP files. Using the include function , include one PHP file into another one. 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.

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.. When a file is included, the code it contains inherits the variable scope of the line on which the include occurs. Any variables available at that line in the calling file will be available within the called file, from that point forward. However, all functions and classes defined in the included file have the global scope.

Dog sled clipart

As you can see, a fatal error message is raised and the code terminates at the line with the require statement - the remaining lines are not executed. Please let us know, we value your feedback! You will be notified via email once the article is available for improvement. The main difference lies in the error handling: if the required file is not found, PHP will generate a fatal error and stop executing the script. In this example, we will inherit a function declared in an external file into our main file using require and then call it. Share your thoughts in the comments. In the Example 2 Including within functions, the last two comments should be reversed I believe. Engineering Exam Experiences. Share This:. Open In App. At the same time, the require statement generates a fatal error and terminates the script. Contribute to the GeeksforGeeks community and help create better learning resources for all. Help the lynx collect pine cones. The include function is mostly used when the file is not required and the application should continue to execute its process when the file is not found. Add Other Experiences.

W3Schools offers a wide range of services and products for beginners and professionals, helping millions of people everyday to learn and master new skills. Create your own website with W3Schools Spaces - no setup required.

This can immediately lead to a fatal error if the file you happen to be including multiple times contains a function declaration or a class declaration. Trending in News. Another thing to note here is that when you include an external file in your code, the variable scope of your main code at the line where the include function is called is merged with that of the included external file. What is the difference between for and Foreach loop in PHP? To better understand how it works, let's check out an example. Easy Normal Medium Hard Expert. The require function works in the same way as include does, except for a small difference that we will discuss in the next section. Save Article. Backend Learn Python Tutorial Reference. 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. Similarly, you can use the require function if you want to make sure that the header.