How to prevent form hijacking in PHP? How would you initialize your strings with single quotes or double quotes?

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What does this link have to do with your question? Don't spam, please.
Generally, before putting something in a database, use mysql_real_escape_string, but if magic quotes are on, don't do this. If they might be or not be on (i.e. you're using your code on more than one server) use strip_slashes first.

If it is a simple form, use captcha.
Which can help you to prevent spamming.

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