Help plz:Differences

[delickate]

What's the difference between "include", "include_once", "require", "require_once"?

plz guide me with examples

thanx

[PFMaBiSmAd]

The php manual explains each of those better and in more detail than anyone could in a forum.

[DeanWhitehouse]

In basic

include - will include the chosen script, and if not found will produce a non fatal error

include_once - will do the same as include but will only include the file once , therefore if you put include for the file more than once in the code it wont include it more than once.

 

require - like include , but will produce fatal error

require_once - same as include_once , but again fatal error

 

Anyone correct me if im wrong with anything

[compguru910]

With the include function, if the file cannot be loaded for whatever reason, the page will continue to load as well as the script. The include once will include the file (if it can be found, and only ran once [incase of functions]). Require, is pretty much self explanatory. With the require function, if the file cannot be loaded, the page will cease to write, and you will get an error. Hope this helps.

[Eggzorcist]

I suggest using require for any authentication scripts or security you want to include. Less important things, use include. That said, I just use require. As, files don't normally vanish so you won't get the error with a live website, plus it's better for testing you're script so you can see if there is an error.

 

If you have any doubts about functions you can try php.net first. It has them all!