How can the use of @mysql_query() affect the immediate sending of emails?

The use of @mysql_query() can affect the immediate sending of emails if there are errors in the SQL query that prevent the email sending code from executing. To solve this issue, it is recommended to handle any potential errors gracefully by checking the result of the mysql_query() function and then proceeding with the email sending code.

// Perform the SQL query
$result = @mysql_query($query);

// Check if the query was successful
if($result){
    // Email sending code here
} else {
    // Handle the error, such as logging it or displaying a message
    echo "Error executing SQL query: " . mysql_error();
}