从UTF-8 XML数据中删除不可见的字符

Question

I am consuming an XML feed which contains a great deal of whitespace. When I echo out the raw feed, it looks as though the columns of the tabled data are properly formatted with just the white space.

I have tried many regex patterns to remove it, to only allow visible characters, trim, chop, utf-8 encode/decode, nothing is touching it. It's like it is laughing in my face when I echo out a value and see this:

string(17) "72"

Opened the data in Notepad++ with show all characters on, and it simply shows it as spaces. I am at a loss of where to go with this.

I did recieve the following error:

simplexml_load_string(): Entity: line 265: parser error : Input is not proper UTF-8, indicate encoding !
Bytes: 0xB0 0x43 0x20 0x74

Answer 1

I just found this regex (untested)

$xml_data = preg_replace("/>\s+</", "><", $xml_data);

If you are using the xml parser, I think you can use the 'XML_OPTION_SKIP_WHITE' option referenced here: http://php.net/manual/en/function.xml-parser-set-option.php