Utilities: Added parseQueryString function.

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@738 44740490-163a-0410-bde0-09ae8108e29a

lib/SimpleSAML/Utilities.php

@@ -1095,6 +1095,37 @@ class SimpleSAML_Utilities {
 		return $baseHost . $dir . $tail;
 	}
 
+
+	/**
+	 * Parse a query string into an array.
+	 *
+	 * This function parses a query string into an array, similar to the way the builtin
+	 * 'parse_str' works, except it doesn't handle arrays, and it doesn't do "magic quotes".
+	 *
+	 * Query parameters without values will be set to an empty string.
+	 *
+	 * @param $query_string  The query string which should be parsed.
+	 * @return The query string as an associative array.
+	 */
+	public function parseQueryString($query_string) {
+		assert('is_string($query_string)');
+
+		$res = array();
+		foreach(split('&', $query_string) as $param) {
+			$param = split('=', $param);
+			$name = urldecode($param[0]);
+			if(count($param) === 1) {
+				$value = '';
+			} else {
+				$value = urldecode($param[1]);
+			}
+
+			$res[$name] = $value;
+		}
+
+		return $res;
+	}
+
 }
 
 ?>
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