Issues with regex in preg_replace

[limex]

Hi,

 

I want to strip the chars that are invalid in XML based on the specs from the W3 Homepage:

 

function strip_invalid_xml_chars( $in ) {
$out = "";
$length = strlen($in);
for ( $i = 0; $i < $length; $i++) {
$current = ord($in{$i});
if ( ($current == 0x9) || ($current == 0xA) || ($current == 0xD) || (($current >= 0x20) && ($current <= 0x7E)) || (($current >= 0xA0) && ($current <= 0xD7FF)) || (($current >= 0xE000) && ($current <= 0xFFFD)) || (($current >= 0x10000) && ($current <= 0x10FFFF))) {
$out .= chr($current);
} else {
$out .= " ";
}
}
return $out;
}

 

But the performance is not the best, so I decided to use regex:

 

$input_sting = "abcdefg ™ ´ ®";
$clean_string=preg_replace('/[^\x9\xA\xD\x20-\x7E\xA0-\{xD7FF}\x{E000}-x{FFFD}\x{10000}-\x{10FFFF}]/u','',$input_sting); 

 

But I get an Warning and an empty $clear_string:

Compilation failed: range out of order in character class at offset 26

 

Could someone fix this? Thanks a lot

[ChemicalBliss]

Hmm, just to let you know - there is a specifric REGEX help sub-forum in this forum, i would suggest moving this topic there as they are the REGEX gurus .

 

-CB-

[cags]

I think you (or whoever wrote it) made a typo, I believe \{xD7FF} should be \x{D7FF}.

[salathe]

There are a number of silly mistakes in your pattern; for example the hex character typoes \{xD7FF} and x{FFFD}, and it nukes the range \x20-\x7E which are perfectly normal, printable, safe, happy-in-XML characters. Can you links us to where precisely you got these ranges of characters from?..

[limex]

THX for your help. Sorry for the late reply.

The code works now because of your help.

The ranges of chars are from the W3 homepage. Where they list the specs for XML. But I don't find the lik any more.