How to Securely Build Dynamic LIKE Conditions in MySQLi Prepared Statements?

Build SELECT Queries with Dynamic LIKE Conditions as mysqli Prepared Statements

When working with user input, prepared statements provide a secure way to execute SQL queries. To handle dynamic numbers of LIKE conditions based on user input, a custom approach is necessary.

The Problem

The given code aims to create a prepared statement with a variable number of LIKE conditions. However, there's an error with the % characters not being placed around the parameters but around the placeholders.

The Solution

To correct the issue, the % characters should wrap the parameters in the construct variable. Here's the modified code:

This will generate a construct string that resembles the following:

Additional Enhancements

The provided PHP snippets leverage object-oriented mysqli instead of procedural syntax. Additionally, the solution ensures dynamic WHERE clause expressions and data types are accommodated, removing the need for a prepared statement if no conditions exist.

Conclusion

By following these steps, you can effectively construct dynamic LIKE conditions in mysqli prepared statements, significantly enhancing your SQL query handling capabilities.

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