Is it necessary to use mysqli_free_result() after mysqli_multi_query in PHP, and how can this function be used effectively?

It is not necessary to use mysqli_free_result() after mysqli_multi_query in PHP because mysqli_multi_query can execute multiple queries in a single call without returning any result sets. However, if you are using mysqli_store_result() to store the result set of each query, you should free the result set using mysqli_free_result() after processing it to free up memory. 

// Example of using mysqli_multi_query without needing to free result sets
$mysqli = new mysqli("localhost", "username", "password", "database");

$query = "SELECT * FROM table1; SELECT * FROM table2;";
$mysqli->multi_query($query);

// Process results if needed

$mysqli->close();

Keywords

mysqli_free_result mysqli_multi_query PHP function usage

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