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copied!<p>For encoding URL parameters, both %20 and + are valid representations of the space character, and both <a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/net/URLVariables.html#toString()" rel="nofollow noreferrer">URLVariables.toString()</a> and <a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/utils/URLUtil.html#objectToString()" rel="nofollow noreferrer">URLUtil.objectToString()</a> emit compliant application/x-www-form-urlencoded data using the former (per <a href="http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf" rel="nofollow noreferrer">ECMA-262</a>). The <a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/package.html#encodeURI()" rel="nofollow noreferrer">encodeURI()</a>, <a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/package.html#encodeURIComponent()" rel="nofollow noreferrer">encodeURIComponent()</a> and <a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/package.html#escape()" rel="nofollow noreferrer">escape()</a> functions all operate similarly. From the AS3 docs:</p> <blockquote> <p><a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/net/URLVariables.html#toString()" rel="nofollow noreferrer"><strong>flash.net.URLVariables.toString()</strong></a></p> <p>Returns a string containing all enumerable variables, in the MIME content encoding application/x-www-form-urlencoded.</p> <p><a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/utils/URLUtil.html#objectToString()" rel="nofollow noreferrer"><strong>mx.utils.URLUtil.objectToString()</strong></a></p> <p>You typically use this method to convert an ActionScript object to a String that you then append to the end of a URL. By default, invalid URL characters are URL-encoded (converted to the %XX format).</p> <p><a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/package.html#encodeURIComponent()" rel="nofollow noreferrer"><strong>encodeURIComponent()</strong></a></p> <p>Encodes a string into a valid URI component. Converts a substring of a URI into a string in which all characters are encoded as UTF-8 escape sequences unless a character belongs to a very small group of basic characters.</p> <p><a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/package.html#escape()" rel="nofollow noreferrer"><strong>escape()</strong></a></p> <p>Converts the parameter to a string and encodes it in a URL-encoded format, where most nonalphanumeric characters are replaced with % hexadecimal sequences. </p> </blockquote> <p>Here's an example showing the usage and output of all four approaches:</p> <pre><code>import mx.utils.URLUtil; private function test():void { var url:String = "http://www.google.com/search?"; var s:String = "here is my search query"; var variables:URLVariables = new URLVariables(); variables.q = s; var o:Object = new Object(); o.q = s; trace(url + "q=" + encodeURIComponent(s)); trace(url + variables.toString()); trace(url + "q=" + escape(s)); trace(url + URLUtil.objectToString(o)); } </code></pre> <p>All four emit the same result (just as JavaScript's own encodeURIComponent() does):</p> <pre><code>// http://www.google.com/search?q=here%20is%20my%20search%20query </code></pre> <p>I agree the plus signs are easier on the eyes, though! To swap them out manually:</p> <pre><code>trace(url + "q=" + escape(s).split("%20").join("+")); </code></pre> <p>But if there's an ActionScript class or top-level function that uses plus signs instead of hex sequences for spaces, I'm not aware of it.</p>

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