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https://stackoverflow.com/questions/4509576/detect-if-pcre-was-built-without-the-enable-unicode-properties-or-enable-utf
I was wondering if there was any simpler way to identify whether PCRE had been built without the --enable-unicode-properties or --enable-utf8 configuration switches. PHP provides access to PCRE_VERSION constant, but that won't help identify whether \P support is enabled or not.
https://chrisjean.com/unicode-support-on-centos-52-with-php-and-pcre/
[chris@home ~]$ pcretest -C PCRE version 6.6 06-Feb-2006 Compiled with UTF-8 support Unicode properties support Newline character is LF Internal link size = 2 POSIX malloc threshold = 10 Default match limit = 10000000 Default recursion depth limit = 10000000 Match recursion uses stack. Looks good. Finally, time to move on with life.
https://www.php.net/manual/en/regexp.reference.unicode.php
Matching characters by Unicode property is not fast, because PCRE has to search a structure that contains data for over fifteen thousand characters. That is why the traditional escape sequences such as \d and \w do not use Unicode properties in PCRE.
https://www.regular-expressions.info/pcre.html
PCRE (Perl Compatible Regular Expressions) is an open source library written in C that allows developers to add regular expression support to their applications. The library is compatible with a great number of C compilers and operating systems.
https://community.oracle.com/thread/1943270
May 31, 2007 · The version of the PCRE library which is bundled with PHP add-on is 6.7 . But in your case 5.0 version of the library is used and that I think, is compiled without UTF-8 support. Web Server's lib directory too has pcre library and looks like this is getting used. That means you must have configured the Web Server to use PHP as NSAPI plugin.
https://www.regular-expressions.info/unicode.html
The PHP preg functions, which are based on PCRE, support Unicode when the /u option is appended to the regular expression. Ruby supports Unicode escapes and properties in regular expressions starting with version 1.9. XRegExp brings support for Unicode properties to JavaScript. RegexBuddy’s regex engine is fully Unicode-based starting with ...
https://bugzilla.redhat.com/show_bug.cgi?id=457064
Description of problem: pcre package comes configured with utf-8 support, but with no unicode properties enabled. Version-Release number of selected component (if applicable): 6.6-2 How reproducible: always Steps to Reproduce: 1.install pcre package from repository Actual results: > pcretest -C PCRE version 6.6 06-Feb-2006 Compiled with UTF-8 support No Unicode properties support Newline ...
https://forum.civicrm.org/index.php?topic=9316.0
Mar 11, 2010 · News: Have a question about CiviCRM? ... If you do have root access, you can download the source code for PCRE, enable Unicode Properties Support, recompile the package, and install it. ... Red Hat have said that PCRE unicode properties support will not be included in RHEL 5.5 but may be included in 5.6 . So in the meantime we have the problem ...
https://forum.directadmin.com/threads/pcre-with-jit-support.47508/
Release 8.20 21-Oct-2011 The main change in this release is the inclusion of Zoltan Herczeg's just-in-time compiler support, which can be accessed by building PCRE with --enable-jit. Large performance benefits can be had in many situations. 8.20 also fixes an unfortunate bug that was...
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