Action script Get variable from PHP file

Hi Everyone, I have one .fla file that able to stream video, (all working) one php file to verify whether this member are login or not and contain one url of that video (example : rtmp://[login to view URL] ) Please refer to [login to view URL] What i want is .fla file call that php file to verify whether this is member or not.. (to prevent some user download the swf and view the video without login) if it is member then load the url to play the video. I think this is very simple project for those who is experience with action script, what i want is some action script statement that link both file and get the variable only.