How to set the include path

The default include path

Windows

      .;C:\xampp\php\PEAR
      

Mac OS X

      .:/Applications/XAMPP/xamppfiles/lib/php
      

Linux

      .:/opt/lampp/lib/php
      

How to get the include path

      $include_path = get_include_path();
      

How to set the include path

Windows

      set_include_path($include_path . ';C:\xampp\htdocs\book_apps\lib');
      

Mac OS X

      set_include_path($include_path . ':/Applications/XAMPP/htdocs/book_apps/lib');
      

Linux

      set_include_path($include_path . ':/opt/lampp/htdocs/book_apps/lib');
      

How to include a file after the include path has been set

      require_once cart.php;
      

• The include path specifies the directories that are searched for included files. By default, the include path specifies the current directory (a dot), followed by any system specific directories such as the PEAR library for Windows. (The PEAR, or PHP Extension and Application Repository, library is a library of open-source code for PHP developers that’s installed with XAMPP.)
• If you want to add a directory to the include path, you can use the get_include_path() and set_include_path() functions. To separate the directories of the include path, you should use semicolons for Windows and colons for Mac and Linux

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