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I'm having some trouble using a 3rd party API, which throws the following PHP error 

preg_replace(): Compilation failed: disallowed Unicode code point (>= 0xd800 && <= 0xdfff) at offset 42  in /.../SoapClient.php on line 20

Can some one help me with understating what this regex means,

[\x{0}-\x{8}\x{B}-\x{C}\x{E}-\x{1F}\x{D800}-\x{DFFF}]

This is the value it tries to match 

5f42caa3-1f41-4ff3-8b6c-3f79e45ed0f1

This is the code bit in the API,

$result = preg_replace('/[\x{0}-\x{8}\x{B}-\x{C}\x{E}-\x{1F}\x{D800}-\x{DFFF}]/u', '', $result);

UPDATE:

By the way I found in the internet making "D"s in the Regex to "E"s will fix the issue, and surpassingly it did fix the issue,

New RegEx,

 [\x{0}-\x{8}\x{B}-\x{C}\x{E}-\x{1F}\x{E800}-\x{EFFF}]

But I dont know its a real fix or not, so still my question is valid.

Improve this question
3
  • The regex matches a character in the range given, but I don't think it will match what you claim it is trying to match. Commented Feb 10, 2014 at 1:21
  • Yep but why it works when I change the Ds Es.. is another thing I dont get... any ideas :( Commented Feb 10, 2014 at 1:44
  • 1
    It works, because you changed the range of characters to something allowed by the engine. The original range contains surrogate, which is not allowed by PCRE. Commented Feb 10, 2014 at 1:49
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