Below is a modified file1. I am not sure this is the expected behaviour, but it was quite hard to figure out. Regarding the case insensitivity problems on Windows, it looks to me as though it is a problem in PHP5 as well at least in some cases. ClassName" ; import "another. So, it won't mess if the file is in whatever directory in whatever directory. The speedup can be dramatic. Furthermore, if you plan on using unit tests and mock objects i.
OK, my method of testing is quite empirical and YMMV but the bonus is the ability to use mock objects in your unit tests. I am aware that even this, i. The following only applies to case insensitive systems like Windows. So use it if the file is required to make the remaining code work and you want the script to fail the file is not available.
With require the file must exist, if it doesn't then an error will display; whereas with include - if the file doesn't exist then then the page will continue loading. The require and include functions do the same task, i. So you may use the require function in the case where the file you are trying to include is the heart of the system and may cause a huge impact on rest of the code and you can use the include function when the file you are trying to include is a simple file containing some less important code.
And my personal recommendation for less important code is to go for the require function everywhere in your code while it is in development phase such that you can debug code and later on replace all require functions by include function before moving it to production such that if you miss any bugs it will not affect the end user and the rest of the code executes properly Multiple includes are just very bad design and must be avoided at all.
But I observed behavior while calling this function in a loop, for first iteration doSomething was getting constant values within xyz. Now every iteration call to doSomething gets the constant values defined in xyz. Another thing is if file is included before. Basically, if you require a wrong path, PHP throws a fatal error and the shutdown function is called, but when you include a wrong path, PHP will continue execution, but it will just display a warning that the file does not exist.
From the English word require , PHP is told that the execution of the page or file depends on the file required. From my experience, it's norm to require important files such as configuration files, database classes and other important utilities. Require means it needs it. It's often a matter of whether you want to load a client library conditionally, or go ahead and load it whether or not you're going to use it.
And that static function is used inside of another function that is being called iteratively inside a loop:. However, you have to include your conf file every time the static function is called.
Unless you're concerned with the overhead of loading a class that might only be used in certain conditions and don't want to load it when it isn't. Replacing requires with includes is often a good optimization technique.
That is looking for log data which save included or required PHP files. So that is slower than include and require. How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?
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Add a comment. Active Oldest Votes. Include will let the script keep running with a warning if the file is missing. Require will crash if it's missing. This is not a good way to write programs. Otherwise, there isn't a difference between the two. As you might guess, there are other ways of doing this. Improve this answer. Norguard Norguard So, What is the best way to Write Include or Require?
Norguard — FarwallGhost. AmalMurali That is exactly the answer, in a human understandable format: include will continue execution with a warning, require will terminate with a fatal error, in the case the resource is missing.
Perhaps you could read those first two statements again.
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