User Guide

700 ActionScript classes
For more information, see the following:
■ Chapter 17, "Understanding Security," in Learning ActionScript 2.0 in Flash
■ The Flash Player 8 Security white paper at http://www.macromedia.com/go/fp8_security
■ The Flash Player 8 Security-Related API white paper at http://www.macromedia.com/go/
fp8_security_apis
For Flash Player 7 and later websites can permit cross-domain access to a resource via a cross-
domain policy file. In SWF files of any version running in Flash Player 7 and later,
url must
be in exactly the same domain. For example, a SWF file at www.someDomain.com can load
data only from sources that are also at www.someDomain.com.
In SWF files that are running in a version of the player earlier than Flash Player 7,
url must
be in the same superdomain as the SWF file that is issuing this call. A superdomain is derived
by removing the left-most component of a file's URL. For example, a SWF file at
www.someDomain.com can load data from sources at store.someDomain.com because both
files are in the same superdomain of someDomain.com.
Availability: ActionScript 1.0; Flash Player 6 - Behavior changed in Flash Player 7.
Parameters
url:String - A string; the URL from which to download the variables. If the SWF file
issuing this call is running in a web browser,
url must be in the same domain as the SWF file.
Returns
Boolean - false if no parameter (null) is passed; true otherwise. Use the onLoad() event
handler to check the success of loaded data.
Example
The following code defines an
onLoad handler function that signals when data is returned to
the Flash application from a server-side PHP script, and then loads the data in passvars.php.
var my_lv:LoadVars = new LoadVars();
my_lv.onLoad = function(success:Boolean) {
if (success) {
trace(this.toString());
} else {
trace("Error loading/parsing LoadVars.");
}
};
my_lv.load("http://www.helpexamples.com/flash/params.txt");