## Is Closing MySQL Connections with `mysql_close()` Still Necessary in Modern PHP?

Is Closing MySQL Connections Obsolete with PHP?

In PHP, the mysql_close() function is used to close a MySQL connection. However, is it still necessary in modern PHP programming?

Answer: Not Required in Most Cases

According to the PHP documentation, closing MySQL connections using mysql_close() is generally not necessary. Non-persistent open links are automatically closed at the end of the script's execution.

Why Not Close Connections Explicitly?

Closing connections explicitly with mysql_close() can be considered pedantic and unnecessary because:

• Automatic Closing: PHP automatically closes non-persistent connections at the end of the script.
• Resource Cleanup: Modern PHP versions effectively manage resources and automatically clean up connections when no longer needed.
• Performance Impact: Repeatedly opening and closing connections can negatively impact performance.

Exceptions to the Rule

While explicit connection closing is generally not required, there may be exceptions when:

• Persistent Connections: Persistent connections remain open throughout the lifetime of the script. Manually closing them can release resources.
• Debugging: Closing connections explicitly can help identify connection-related issues during development.
• Personal Preference: Some developers prefer to explicitly close connections for consistency or clarity.

Conclusion

In most cases, closing MySQL connections explicitly with mysql_close() is not necessary in PHP. However, there are exceptions where it may be beneficial for specific reasons.

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