ear-fung.us I’m a programmer. I’m also pro-grammar.

Code Snippet: Extract A Value From A Querystring in AS3

I found myself in need of extracting a given value from a query string that was inside an XML attribute. Searching for something like this, I couldn't find anything on par with PHP's parse_str() so I got the string out of the XML and wrote this handy function:

function getQueryStringVar(queryStr:String, targetVar:String):String
{
	var pairs = queryStr.split("&");
	for(var i:String in pairs)
	{
		var splitStr = pairs[i].split("=");
		if(splitStr[0] == targetVar)return splitStr[1];
	}
	return "";
}

Usage is easy. Just send it your query string as the first parameter (make sure there's not a "?" at the beginning) and key you want to know the value of.

// myVal is set to "example"
var myVal:String = getQueryStringVar("val1=test&val2=example", "val2");

Let me know if you find this function useful or if you improve upon it.