Scott B Scott B - 4 months ago 11
PHP Question

Difference between require,include and include_once?

In PHP:


  • When should I use
    require
    vs.
    include
    ?

  • When should I use
    require_once
    vs.
    require
    ?


Leo Leo
Answer

There are require and include_once as well.

So your question should be...

  1. When should I use require vs. include?
  2. When should I use require_once vs. require

The answer to 1 is described here.

The require() function is identical to include(), except that it handles errors differently. If an error occurs, the include() function generates a warning, but the script will continue execution. The require() generates a fatal error, and the script will stop.

The answer to 2 can be found here.

The require_once() statement is identical to require() except PHP will check if the file has already been included, and if so, not include (require) it again.

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