character encoding - PHP generated XML shows invalid Char value 27 message

Question

I am generating XML using PHP library as below:

$dom = new DOMDocument("1.0","utf-8");

Doing above results in a page which shows a message on top of the output.

This page contains the following errors: error on line 16 at column 274505: PCDATA invalid Char value 27 Below is a rendering of the page up to the first error.

I have tried rectifying using Tidy library.. used iconv to get the chinese character in UTF-8.

Answer 1

A useful function to get rid of that error is suggested on this website. http://www.phpwact.org/php/i18n/charsets#common_problem_areas_with_utf-8

When you put utf-8 encoded strings in a XML document you should remember that not all utf-8 valid chars are accepted in a XML document http://www.w3.org/TR/REC-xml/#charsets

So you should strip away the unwanted chars, else you’ll have an XML fatal parsing error such as above

function utf8_for_xml($string)
{
    return preg_replace ('/[^x{0009}x{000a}x{000d}x{0020}-x{D7FF}x{E000}-x{FFFD}]+/u', ' ', $string);
}

Hope that saves someone else some time..