ASCII and XML whitespaces

Rui_Marques

Hello!

I have a XML whitespace that i have to point out and cut off... this whitespace is a String of a '\r' or a '\n' followed by 3 tabs (3x'\t').

My problem is that php doesn't recognize:
$string[$i] !='\r' neither the
strcmp($string{$i},'\r'), both of them return true when it was suposed to return false!

Now i'm ready to try anything, even convert each part to ASCII and then compare de value, but i don't know how to do that...

Can anybody help?

Thanks in advance

Rui M.

bobthedog

You need to use double quotes ie

$string[$i] !="\r";

if you use single quotes PHP treats \r as a string literal (ie literally a string containing \r), however using double quotes lets php parse out the \r and replace it with a carriage return ascii code.

Rui_Marques

I've tried that too!

double-coute didn't help because what i want is a char, not a string!

i continued researching and the answer is trim() the XML string,
http://www.php.net/manual/sl/function.trim.php . If the $string[$i]==' ' in all positions or if strlen($string)==0 then this is a whitespace:

function is_whitespace($this){
        for($i=0 ; $i<strlen(trim($this)) ; $i++){
                if($this[$i]!=' ')return 0;
        }

    return 1;
}

thanks for answering!

Rui M.