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92 lines
4.0 KiB
92 lines
4.0 KiB
<?php
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// Project: Web Reference Database (refbase) <http://www.refbase.net>
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// Copyright: Matthias Steffens <mailto:refbase@extracts.de> and the file's
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// original author(s).
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//
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// This code is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY. Please see the GNU General Public
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// License for more details.
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//
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// File: ./includes/transtab_unicode_charset.inc.php
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// Repository: $HeadURL$
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// Author(s): Matthias Steffens <mailto:refbase@extracts.de>
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//
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// Created: 24-Jul-08, 17:00
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// Modified: $Date: 2012-02-29 00:20:51 +0000 (Wed, 29 Feb 2012) $
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// $Author$
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// $Revision: 1351 $
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// Search & replace patterns and variables for matching (and conversion of) Unicode character case & classes.
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// Search & replace patterns must be specified as perl-style regular expression and search patterns must include the
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// leading & trailing slashes.
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// NOTE: Quote from <http://www.onphp5.com/article/22> ("i18n with PHP5: Pitfalls"):
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// "PCRE and other regular expression extensions are not locale-aware. This most notably influences the \w class
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// that is unable to work for Cyrillic letters. There could be a workaround for this if some preprocessor for the
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// regex string could replace \w and friends with character range prior to calling PCRE functions."
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//
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// In case of a UTF-8 based system, Unicode character properties ("\p{...}" or "\P{...}") can be used instead of the
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// normal and POSIX character classes. These are available since PHP 4.4.0 and PHP 5.1.0. Note that the use of Unicode
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// properties requires the "/.../u" PCRE pattern modifier! More info:
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// <http://www.php.net/manual/en/regexp.reference.unicode.php>
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// The variables '$alnum', '$alpha', '$cntrl', '$dash', '$digit', '$graph', '$lower', '$print', '$punct', '$space',
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// '$upper', '$word' must be used within a perl-style regex character class and require the "/.../u" PCRE pattern modifier.
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// Matches Unicode letters & digits:
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$alnum = "\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}"; // Unicode-aware equivalent of "[:alnum:]"
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// Matches Unicode letters:
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$alpha = "\p{Ll}\p{Lu}\p{Lt}\p{Lo}"; // Unicode-aware equivalent of "[:alpha:]"
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// Matches Unicode control codes & characters not in other categories:
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$cntrl = "\p{C}"; // Unicode-aware equivalent of "[:cntrl:]"
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// Matches Unicode dashes & hyphens:
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$dash = "\p{Pd}";
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// Matches Unicode digits:
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$digit = "\p{Nd}"; // Unicode-aware equivalent of "[:digit:]"
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// Matches Unicode printing characters (excluding space):
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$graph = "^\p{C}\t\n\f\r\p{Z}"; // Unicode-aware equivalent of "[:graph:]"
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// Matches Unicode lower case letters:
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$lower = "\p{Ll}"; // Unicode-aware equivalent of "[:lower:]"
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// Matches Unicode printing characters (including space):
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$print = "\P{C}"; // same as "^\p{C}", Unicode-aware equivalent of "[:print:]"
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// Matches Unicode punctuation (printing characters excluding letters & digits):
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$punct = "\p{P}"; // Unicode-aware equivalent of "[:punct:]"
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// Matches Unicode whitespace (separating characters with no visual representation):
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$space = "\t\n\f\r\p{Z}"; // Unicode-aware equivalent of "[:space:]"
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// Matches Unicode upper case letters:
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$upper = "\p{Lu}\p{Lt}"; // Unicode-aware equivalent of "[:upper:]"
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// Matches Unicode "word" characters:
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$word = "_\p{Ll}\p{Lu}\p{Lt}\p{Lo}\p{Nd}"; // Unicode-aware equivalent of "[:word:]" (or "[:alnum:]" plus "_")
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// Defines the PCRE pattern modifier(s) to be used in conjunction with the above variables:
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// More info: <http://www.php.net/manual/en/reference.pcre.pattern.modifiers.php>
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$patternModifiers = "u"; // the "u" (PCRE_UTF8) pattern modifier causes PHP/PCRE to treat pattern strings as UTF-8
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// Converts Unicode upper case letters to their corresponding lower case letter:
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// TODO!
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$transtab_upper_lower = array(
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);
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// Converts Unicode lower case letters to their corresponding upper case letter:
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// TODO!
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$transtab_lower_upper = array(
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);
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?>
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