CIACTech08-001: Understanding PHP Exploits

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02-05-2008

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CIACTech08-001: Understanding PHP Exploits

Many websites use the PHP programming language to build web pages on the fly from individual files and from values obtained from a database. PHP based websites are widely used to create Wikis such as MediaWiki used for Wikipedia. If the PHP programs that generate the web pages are not carefully crafted to check user input before it is used, an intruder could inject code into a page and get it executed.

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LEARN ABOUT PHP

main

MAIN(3) 								 1								   MAIN(3)

main - Dummy formain(3)

	There  is  no  function  named	main(3)  except  in  the  PHP  source.	In  PHP  4.3.0,  a  new  type  of error handling in the PHP source
       (php_error_docref) was introduced. One feature is to provide links to a	manual	page  in  PHP  error  messages	when  the  PHP	directives
       html_errors (on by default) and docref_root (on by default until PHP 4.3.2) are set.

	Sometimes  error messages refer to a manual page for the function main(3) which is why this page exists. If you discover such a reference,
       please file a bug report, indicating the PHP function caused the error that linked to main(3) and it will be fixed and properly documented.

       Known errors that point to main(3)

       +----------------+-----------------------------+
       | Function name	|			      |
       |		|			      |
       |		| No longer points here as of |
       |		|			      |
       +----------------+-----------------------------+
       |  include(3)	|			      |
       |		|			      |
       |		|	     5.1.0	      |
       |		|			      |
       |include_once(3) |			      |
       |		|			      |
       |		|	     5.1.0	      |
       |		|			      |
       |  require(3)	|			      |
       |		|			      |
       |		|	     5.1.0	      |
       |		|			      |
       |require_once(3) |			      |
       |		|			      |
       |		|	     5.1.0	      |
       |		|			      |
       +----------------+-----------------------------+
       html_errors, display_errors.

PHP Documentation Group 														   MAIN(3)

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