Empty post data when insert % or `in the html form

Hi ,
i really need help with my website built with codeinigter

1/ i have an html form , methode="post" with a textarea 
    
2/ the problem is that, when the text that i put in the textarea contains %  or ` , the post data is empty when i check it in the controller 

var-dump($_POST)   ----> array(0) {  }
and $this->input->post is NULL

3/ in my local computer it doesn't do that error , even i when i copy and paste the text from word 
but it's online the problem , when i put % or ` in the textarea  , post data is always empty


4/ i think that codeinigter does something in background ( security or something else ... ) i really don't know

could you help me on  this problem please ? 

I did some internet research but only found a suggestion that it might be an Apache security feature, however, that would apply to textboxes as well, and you say it only happens in textareas?

Hey, don't work without a PHP debugger. Several free IDEs have this features built in. Two are NetBeans and CodeLobster. Without a debugger, it's like you're driving with a blindfold on -- you are going to crash!

Hi,

thank you for your answer !

You are right ! the <input type="text"  >    are also concerned , when i put % inside one of them , it also create the error !

So you say it's about security ! ok , thank you , i'll make a research in this way !

I did some internet research but only found a suggestion that it might be an Apache security feature, however, that would apply to textboxes as well, and you say it only happens in textareas?

really thank you RobertSF ,
yes it was a problem of apache security ! really thank you ! the problem is solved !