What does the warning "mysql_query() expects at most 2 parameters, 7 given" mean in PHP?

The warning "mysql_query() expects at most 2 parameters, 7 given" means that the function mysql_query() is being called with more parameters than it can accept. In PHP, the mysql_query() function only accepts two parameters: the SQL query and the connection to the MySQL server. To solve this issue, you should review the code where mysql_query() is being called and make sure that only the necessary two parameters are passed.

// Incorrect usage of mysql_query() with 7 parameters
$result = mysql_query($sql, $param1, $param2, $param3, $param4, $param5, $param6);

// Correct usage of mysql_query() with 2 parameters
$result = mysql_query($sql, $connection);