How to remove invalid XML characters from a document using PHP

I am trying to create an XML document that is about 23-30 MB, when I open it with Firefox, I get

XML Parsing Error: not well-formed
Location: file:///Users/User/Downloads/export(2).xml
Line Number 137725, Column 1343:

After that, I try to check the document XML Nannyand get the following error:

Invalid Character (Unicode: 0xB)

On several (13) lines: 137725, 137738, 137751, 137764, 137777, 137790, 137803, 137816, 146834, 189949, 193444, 193457, 193470.

I tried several “solutions” that include:

• Regular expression:

  preg_replace(
    '/[^\x9\xA\xD\x20-\x{D7FF}\x{E000}-\x{FFFD}\x{10000}-\x{10FFFF}]+/'
    , ' ', $data->Description);
  

  The problem is that I'm not quite sure if this is a valid RegEx, because I am getting an internal server error due to the included mod protection in our apache.

• I tried to save the file in UTF-8 using the spec, but it was desperate to try

• I tried to use iconv with 'UTF-8 // IGNORE', but that didn't help

• , , 230 ., , . max_execution_time php script .

- , , script , .