Posting special characters in javascript

I'm using ajax as a form control which posts a value from a form to a php script to be checked etc before placing into a database.

However the content can contain characters such as '&, $, £', how can I ask escape these using javascript so that errors don't occur when bad characters are input?

Thanks

 

You can use var str=@"your string here"; instead.

 

Well the problem is it's in a post manner so:

variable1=content or post&variable2=second contest of post

Works okay untill= something like:

variable1=content or & post&variable2=second contest | of post

 

encodeURI & encodeURIComponent method is good to use for this case

 

you can use escape('Your string') function in javascript.... so all your special characters will be converted to '%2%3F' like that to get back what you send you use unescape('received querystring')

 

So sending the post in javascript would be:

var safeTest = escape(test);

xmlhttp.open("POST","insertTest.php",true);
xmlhttp.onreadystatechange  = handleServerResponse;
xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xmlhttp.send("testPost=" + safeTest);

Code (markup):

Then in php to recover:

$test = urldecode($_POST['testPost']);

PHP:

(The code is then checked to ensure it is safe before being inserted into a database)