regex unable to match string

Question

I am unablt to use the following code to match the following string, I do not know what is going on

$regex = "/\\251/i";
if (preg_match($regex, $contents)) {
  echo 'good it works';
}

the $contents are as follows

Shanghai Taipei Tokyo TorontoOxford is a registered trade mark of Oxford University Pressin the UK and in certain other countriesPublished in the United Statesby Oxford University Press Inc., New YorkRevised text \251 John Guy 2000

I have tried encoding the string to no luck

$contents = utf8_encode ($contents);

this works in all the online tools i used, am I missing anything to see why it would not work when being run?

yes i do the following works on this website but not when ranhttp://www.phpliveregex.com/ — user3117904, Dec 20 '13 at 06:41
How are you establishing the value of `contents`? Are you escaping the \ there as well? — Peter Alfvin, Dec 20 '13 at 06:41
@PeterAlfvin no the \ is not escaped, i am parsing an url and returning it as an string — user3117904, Dec 20 '13 at 06:45

brandonscript · Answer 1 · 2013-12-20T06:51:42.863

0

In this case want to use the raw (unescaped) backslash to match the character 251 (Character octal 0251 is the ISO-LATIN-1 copyright symbol).

Try simply \251 to match the © character directly, since it looks like your content is already UTF8 encoded.

See an example: http://regex101.com/r/eT3mZ8

edited Dec 20 '13 at 06:51

answered Dec 20 '13 at 06:43

brandonscript

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score 0 · Answer 2 · answered Dec 20 '13 at 06:44

0

You should try with:

preg_match('/(\xA9)/i', $text);

Or:

preg_match('/(\251)/i', $text);

answered Dec 20 '13 at 06:44

Ignacio Ocampo

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score 0 · Answer 3 · answered Dec 20 '13 at 07:16

I tried in PERL to check whether regex is proper or not. Please find the following perl code which has regex which perfectly matches \251

#!C:\Perl64\bin
$regex = "Shanghai Taipei Tokyo TorontoOxford is a registered trade mark of Oxford University Pressin the UK and in certain other countriesPublished in the United Statesby Oxford University Press Inc., New YorkRevised text \251 John Guy 2000";
if ("$regex" =~ m/(\251)/)
{
    print "Success scenario\n";
    print "$regex is matched \n";
} else {
    print "$regex is not matched \n";
}

This will output -->

Success scenario
Shanghai Taipei Tokyo TorontoOxford is a registered trade mark of Oxford Univers

ity Pressin the UK and in certain other countriesPublished in the United Statesb y Oxford University Press Inc., New YorkRevised text \251 John Guy 2000 is matched

Hope this might help you

Thanks

regex unable to match string

3 Answers3