Binds a PHP variable to a remote procedure parameter.
bool sybase_rpc_bind_param_ex(resource $stmt, int $param_id, mixed $var, string $type [, bool $is_null [, int $direction]] )
'd' - double
'i' - integer
'b' - binary
's' - string
SASE_D_INPUT – for an input parameter (default).
SASE_D_OUTPUT – for an output parameter.
TRUE – binding the PHP variable succeeded.
FALSE – binding the PHP variable failed