Javascript String Length Differs From PHP mb_strlen (on textarea row, line breaks)

I am using JavaScript as well as PHP to calculate string lengths. Everything is OK except when I calculate a textarea string length coming from Chrome or Firefox versus Internet Explorer. New textarea rows/linebreaks are calculated as 2 chars in Internet Explorer and PHP. But Chrome and Firefox calculate textarea rows/linebreaks just as 1 char (versus PHP and Internet Explorer calculates as 2). This is my problem. Anyone knows how to resolve it?

So JavaScript char count in a textarea in IE = the string length calculated with PHP /// And JavaScript char count in a textarea in Chrome/Firefox does not equal the string length calculated with PHP.

Code used:

Javascript  :  document.getElementById("text").value.length

PHP  :  mb_strlen($_POST['text'], 'UTF-8')

There are other posts about this, mainly th开发者_如何学运维e following one: Javascript String Length Differs From PHP mb_strlen . But the answer to my question is not there and couldn't find it on any other posts.

Thanks for your help and suggestions.

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Firefox and Chrome use only \n for linebreaks while IE(opera too) uses \r\n

To get unique results replace all occurrences of \r\n by \n before counting the string-length