在mySQL查询中使用POST信息

Simple question, probably takes a rather simple answer, but I haven't found anything online about it. I'm working on an Android app that needs to access a mySQL cloud database. To this end, I'm creating a PHP webservice to interface the two (as well as provide an extra layer of protection for the mySQl credentials). The issue is that I"m using a POST method to send variables to the queries to tell them what operations to do, such as:

$db->query("DROP TABLE {$_POST[table]}");

The issue is that when I try to send values for something like an INSERT statement, I need to use quotes around the strings. Unfortunately, the UTF-8 encoding turns all the quotes into escaped quotes. What should I do to fix this?

Use stripslash(%str) to remove the slashes. I don't know where the slashes are coming from, but putting this into code to remove the slashes works.