Use command-line tools in PHP

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Title: Use command-line tools in PHP

Learn how to better integrate scripts with command-line tools. Emphasis is placed on using shell_exec(), exec(), passthru(), and system(); safely passing information to the command line; and safely retrieving information from it.

Learn more:
http://www.ibm.com/developerworks/opensource/library/os-php-commandline/index.html?ca=drs-

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