Concerning the bindParam bound floating point number of PDO

The bindParam bound floating point number of PDO is about bindParam binding. it has a parameter that specifies the data type. I can see PARAM_STR, PARAM_INT, and so on, but the type of floating point numbers like PARAM_DOUBLE or PARAM_FLOAT cannot be found. how can this problem be solved? Thank you!

Reply to discussion (solution)

Bool PDOStatement: bindParam (mixed parameter, mixed & variable [, int data_type [, int length [, mixed driver_options])
Parameters enclosed in square brackets can be omitted.
Since it doesn't matter whether you want to do so, why stick to him?

It seems that str includes float ?? .