How to Fix 'Warning: mysqli_query() expects parameter 1 to be mysqli, resource given' Error Due to Mixed MySQL Extension Usage?

Resolving "Warning: mysqli_query() expects parameter 1 to be mysqli, resource given" Error for Mixed MySQL Extension Usage

Problem:

Upon utilizing the PHP code provided, a "Warning: mysqli_query() expects parameter 1 to be mysqli, resource given" error is encountered. This error arises from mixing the obsolete MySQL extension with its newer counterpart, MySQLi.

Answer:

To rectify this error, it is imperative to employ the MySQLi extension consistently throughout the code. Specifically, the connections established in the given code should be modified as follows:

$myConnection = mysqli_connect("$db_host","$db_username","$db_pass") or die ("could not connect to mysql"); 
mysqli_select_db($myConnection, "mrmagicadam") or die ("no database"); 

By employing these adjustments, the MySQLi extension will be exclusively utilized, eliminating the conflict between the two extensions.

Significance of MySQLi over MySQL:

It is strongly advised to opt for the MySQLi extension over its predecessor, MySQL, due to its enhanced efficiency and feature set. MySQLi provides numerous advantages, including:

• Improved performance
• Simplified API
• Better security
• Support for prepared statements

By transitioning to MySQLi, developers can leverage its enhanced capabilities and ensure the continued functionality of their applications.

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