Question

When using mysql_query inside of a class method and setting it to a local variable is memory freed when the method finishes execution or at the end of the script? Is it worth adding mysql_free_result? Below is example.

class example{
    public function Query($query){
        $result = mysql_query($query);
        while ($row = mysql_fetch_assoc($result))
        {
            $this->rows[] =$row;
        }
    }
}

Will memory be freed when the method finishes or is it necessary to call mysql_free_result at the end of the method?

Answer 1

First of all, mysql_ php functions are not maintained anymore and thus you may want to use a more OOP approach such as mysqli or PDO functions.

Since mysql_free_result()

will free all memory associated with the result identifier result.

If you are fetching a lot of results then yes, you can (and should) use this function to free your mysql to save memory.

As for the rest of your question:

Will memory be freed when the method finishes or is it necessary to call mysql_free_result at the end of the method?

No, in case of you are not using the mysql_free_result the memory won’t be freed at the end of your method but rather in the end of the execution of your script.

I hope it helped. Cheers.