To include a PHP file into an opened PHP script we may use one of following two possible groups of statements:

  1. The require and require_once statements
  2. The include and include_once statements

The require statement after being called will add the required file's source code into the source code where it is called from.

NOTE: The difference between the require and include statements is that the require statement in case of a failure produces an error and halts the script, while on the other hand, the include statement will only produce a warning and continue with the script.

The require_once statement is similar to the require statement except the script will check if the file has already been included in the script.

Syntax for REQUIRE statement

    require "file.php";

Example with REQUIRE_ONCE statement



›› go to examples ››