ID: 27103 Updated by: [EMAIL PROTECTED] Reported By: Aidan Kehoe <php-manual at parhasard dot net> -Status: Open +Status: Verified Bug Type: PCRE related Operating System: NetBSD 1.6ZD PHP Version: 4.3.4 New Comment:
Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php Previous Comments: ------------------------------------------------------------------------ [2004-01-31 07:16:11] Aidan Kehoe <php-manual at parhasard dot net> Description: ------------ http://php.net/manual/en/pcre.pattern.modifiers.php states that the /u modifier "... turns on additional functionality of PCRE that is incompatible with Perl. Pattern strings are treated as UTF-8." The PCRE documentation itself says "In order process UTF-8 strings, you must build PCRE to include UTF-8 support in the code, and, in addition, you must call pcre_compile() with the PCRE_UTF8 option flag. When you do this, both the pattern and any subject strings that are matched against it are treated as UTF-8 strings instead of just strings of bytes." This says, to me, that the /u modifier in our PCRE expressions maps to the PCRE_UTF8 option flag in the C. And, sure enough, preg_match_all('/./u', $string, $matches) puts an array of all the UTF-8 characters in $string into $matches[0]. preg_split('//u', $string) then, by this logic, should return an array containing the UTF-8 characters in $string. It doesn't--it returns instead an array of the octets in $string. Reproduce code: --------------- #!/usr/pkg/bin/php <?php /* The Euro sign--U+20AC--followed by " hi there", in UTF-8. */ $teststr = "\xe2\x82\xac hi there"; /* Split it into individual characters, passing the /u flag to tell PCRE to interpret the string as UTF-8. */ $testchars = preg_split('//u', $teststr, -1, PREG_SPLIT_NO_EMPTY); /* Get some output that should be equivalent. */ preg_match_all('/./u', $teststr, $matches); $goodtestchars = $matches[0]; /* The arrays should be the same length. */ print "This should be 1: '".(count($testchars) == count($goodtestchars))."'\n"; /* And the octet count of the first entry should be three for both arrays. */ print 'These both should be three: '; print strlen($testchars[0]).', '.strlen($goodtestchars[0]). "\n"; ?> Expected result: ---------------- $ ./testing.php This should be 1: '1' These both should be three: 3, 3 $ Actual result: -------------- $ ./testing.php This should be 1: '' These both should be three: 1, 3 $ ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=27103&edit=1
