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Securing data coming in from $_GET & $_POST super globals

Last Modified: 2013-12-13
Hello I have an application which would receive data as input both from $_GET & $_POST arrays. Presently the only method I am using to secure data going to database is through mysql_real_escape_string. Rather than that, I do not use any other filtering. The application is basically for intranet purposes, so security isn't supreme, but just to be safe, I would like to know if there could be any security measures that I should take, for filtring data.
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