How Do I Properly Escape Special Characters in MySQL Queries?

Escaping Special Characters in MySQL Queries

When building MySQL queries that include special characters, it's crucial to escape them to avoid syntax errors. This becomes even more important when dealing with user input, as special characters can be exploited for malicious purposes.

Consider the following example:

select * from tablename where fields like "%string "hi"  %";

In this query, the double quotes surrounding the string "hi" are interpreted as part of the string itself, causing a syntax error.

Escaping Requirements

The specific escape sequence required depends on the special character being used. MySQL recognizes the following escape sequences:

• '

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