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If you encounter the error “Deprecated: Function set_magic_quotes_runtime()” in your PHP application, it means your code is using a function that is no longer supported in modern PHP versions. This issue commonly appears after upgrading PHP, especially when moving to PHP 5.4 or later.

Understanding why this error occurs and how to fix it will help you ensure your application runs smoothly on newer PHP environments.

What Causes This Error?

The function set_magic_quotes_runtime() was part of older PHP versions and was used to automatically escape special characters in database queries. However, due to performance issues and better alternatives, it was:

• Deprecated in PHP 5.3
• Removed completely in PHP 5.4 and later

As a result, any application still using this function will trigger a deprecated warning or even a fatal error in newer PHP versions.

How to Fix the Error

1. Remove the Deprecated Function

Search your codebase for:

set_magic_quotes_runtime();

Simply remove or comment out this line:

// set_magic_quotes_runtime();

2. Replace with Proper Data Handling

Instead of relying on magic quotes, use secure and modern methods for handling user input:

• Use prepared statements (PDO or MySQLi)
• Apply proper escaping functions like: mysqli_real_escape_string()
• Validate and sanitize all user inputs

3. Check for Related Functions

Also look for other deprecated functions such as:

get_magic_quotes_runtime();

These should also be removed from your code.

4. Update Legacy Applications

If you are using an older CMS, plugin, or custom script, make sure:

• It is updated to the latest version
• It supports your current PHP version

Outdated software often contains deprecated functions that cause such errors.

5. (Temporary) Disable Error Display

If needed, you can hide deprecated warnings temporarily (not recommended for long-term use):

error_reporting(E_ALL & ~E_DEPRECATED);

This only suppresses the warning but does not fix the root cause.

Conclusion

The “Deprecated: Function set_magic_quotes_runtime()” error occurs because the function has been removed from modern PHP versions. The best solution is to remove it completely and adopt secure coding practices like prepared statements and proper input validation.

Keeping your codebase updated and following modern PHP standards will help prevent such errors and improve the overall security and performance of your application.

If you require help, contact SupportPRO Server Admin