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godot-question2answer/qa-include/util/string.php
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<?php
/*
Question2Answer by Gideon Greenspan and contributors
http://www.question2answer.org/
File: qa-include/util/string.php
Description: Some useful string-related stuff
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
More about this license: http://www.question2answer.org/license.php
*/
if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
header('Location: ../../');
exit;
}
// Functions
/**
* Set up some global tables to be used by other functions in this file
*/
function qa_string_initialize()
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
global $qa_utf8punctuation, $qa_utf8removeaccents;
// converts UTF-8 punctuation characters to spaces (or in some cases, hyphens)
$qa_utf8punctuation = array(
"\xC2\xA1" => ' ', // INVERTED EXCLAMATION MARK
"\xC2\xA6" => ' ', // BROKEN BAR
"\xC2\xAB" => ' ', // LEFT-POINTING DOUBLE ANGLE QUOTATION MARK
"\xC2\xB1" => ' ', // PLUS-MINUS SIGN
"\xC2\xBB" => ' ', // RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK
"\xC2\xBF" => ' ', // INVERTED QUESTION MARK
"\xC3\x97" => ' ', // MULTIPLICATION SIGN
"\xC3\xB7" => ' ', // DIVISION SIGN
"\xE2\x80\x80" => ' ', // EN QUAD
"\xE2\x80\x81" => ' ', // EM QUAD
"\xE2\x80\x82" => ' ', // EN SPACE
"\xE2\x80\x83" => ' ', // EM SPACE
"\xE2\x80\x84" => ' ', // THREE-PER-EM SPACE
"\xE2\x80\x85" => ' ', // FOUR-PER-EM SPACE
"\xE2\x80\x86" => ' ', // SIX-PER-EM SPACE
"\xE2\x80\x87" => ' ', // FIGURE SPACE
"\xE2\x80\x88" => ' ', // PUNCTUATION SPACE
"\xE2\x80\x89" => ' ', // THIN SPACE
"\xE2\x80\x8A" => ' ', // HAIR SPACE
"\xE2\x80\x8B" => ' ', // ZERO WIDTH SPACE
"\xE2\x80\x8C" => ' ', // ZERO WIDTH NON-JOINER
"\xE2\x80\x8E" => ' ', // LEFT-TO-RIGHT MARK
"\xE2\x80\x8F" => ' ', // RIGHT-TO-LEFT MARK
"\xE2\x80\x90" => '-', // HYPHEN
"\xE2\x80\x91" => '-', // NON-BREAKING HYPHEN
"\xE2\x80\x92" => '-', // FIGURE DASH
"\xE2\x80\x93" => '-', // EN DASH
"\xE2\x80\x94" => '-', // EM DASH
"\xE2\x80\x95" => '-', // HORIZONTAL BAR
"\xE2\x80\x96" => ' ', // DOUBLE VERTICAL LINE
"\xE2\x80\x98" => ' ', // LEFT SINGLE QUOTATION MARK
"\xE2\x80\x99" => "'", // RIGHT SINGLE QUOTATION MARK
"\xE2\x80\x9A" => ' ', // SINGLE LOW-9 QUOTATION MARK
"\xE2\x80\x9B" => ' ', // SINGLE HIGH-REVERSED-9 QUOTATION MARK
"\xE2\x80\x9C" => ' ', // LEFT DOUBLE QUOTATION MARK
"\xE2\x80\x9D" => ' ', // RIGHT DOUBLE QUOTATION MARK
"\xE2\x80\x9E" => ' ', // DOUBLE LOW-9 QUOTATION MARK
"\xE2\x80\x9F" => ' ', // DOUBLE HIGH-REVERSED-9 QUOTATION MARK
"\xE2\x80\xA2" => ' ', // BULLET
"\xE2\x80\xA4" => ' ', // ONE DOT LEADER
"\xE2\x80\xA5" => ' ', // TWO DOT LEADER
"\xE2\x80\xA6" => ' ', // HORIZONTAL ELLIPSIS
"\xE2\x80\xB9" => ' ', // SINGLE LEFT-POINTING ANGLE QUOTATION MARK
"\xE2\x80\xBA" => ' ', // SINGLE RIGHT-POINTING ANGLE QUOTATION MARK
"\xE2\x80\xBC" => ' ', // DOUBLE EXCLAMATION MARK
"\xE2\x80\xBD" => ' ', // INTERROBANG
"\xE2\x81\x87" => ' ', // DOUBLE QUESTION MARK
"\xE2\x81\x88" => ' ', // QUESTION EXCLAMATION MARK
"\xE2\x81\x89" => ' ', // EXCLAMATION QUESTION MARK
"\xE3\x80\x80" => ' ', // IDEOGRAPHIC SPACE
"\xE3\x80\x81" => ' ', // IDEOGRAPHIC COMMA
"\xE3\x80\x82" => ' ', // IDEOGRAPHIC FULL STOP
);
// convert UTF-8 accented characters to basic Roman characters
$qa_utf8removeaccents = array(
"\xC3\x80" => 'A', // LATIN CAPITAL LETTER A WITH GRAVE
"\xC3\x81" => 'A', // LATIN CAPITAL LETTER A WITH ACUTE
"\xC3\x82" => 'A', // LATIN CAPITAL LETTER A WITH CIRCUMFLEX
"\xC3\x83" => 'A', // LATIN CAPITAL LETTER A WITH TILDE
"\xC3\x84" => 'A', // LATIN CAPITAL LETTER A WITH DIAERESIS
"\xC3\x85" => 'A', // LATIN CAPITAL LETTER A WITH RING ABOVE
"\xC3\x86" => 'AE', // LATIN CAPITAL LETTER AE
"\xC3\x87" => 'C', // LATIN CAPITAL LETTER C WITH CEDILLA
"\xC3\x88" => 'E', // LATIN CAPITAL LETTER E WITH GRAVE
"\xC3\x89" => 'E', // LATIN CAPITAL LETTER E WITH ACUTE
"\xC3\x8A" => 'E', // LATIN CAPITAL LETTER E WITH CIRCUMFLEX
"\xC3\x8B" => 'E', // LATIN CAPITAL LETTER E WITH DIAERESIS
"\xC3\x8C" => 'I', // LATIN CAPITAL LETTER I WITH GRAVE
"\xC3\x8D" => 'I', // LATIN CAPITAL LETTER I WITH ACUTE
"\xC3\x8E" => 'I', // LATIN CAPITAL LETTER I WITH CIRCUMFLEX
"\xC3\x8F" => 'I', // LATIN CAPITAL LETTER I WITH DIAERESIS
"\xC3\x91" => 'N', // LATIN CAPITAL LETTER N WITH TILDE
"\xC3\x92" => 'O', // LATIN CAPITAL LETTER O WITH GRAVE
"\xC3\x93" => 'O', // LATIN CAPITAL LETTER O WITH ACUTE
"\xC3\x94" => 'O', // LATIN CAPITAL LETTER O WITH CIRCUMFLEX
"\xC3\x95" => 'O', // LATIN CAPITAL LETTER O WITH TILDE
"\xC3\x96" => 'O', // LATIN CAPITAL LETTER O WITH DIAERESIS
"\xC3\x98" => 'O', // LATIN CAPITAL LETTER O WITH STROKE
"\xC3\x99" => 'U', // LATIN CAPITAL LETTER U WITH GRAVE
"\xC3\x9A" => 'U', // LATIN CAPITAL LETTER U WITH ACUTE
"\xC3\x9B" => 'U', // LATIN CAPITAL LETTER U WITH CIRCUMFLEX
"\xC3\x9C" => 'U', // LATIN CAPITAL LETTER U WITH DIAERESIS
"\xC3\x9D" => 'Y', // LATIN CAPITAL LETTER Y WITH ACUTE
"\xC3\x9F" => 'ss', // LATIN SMALL LETTER SHARP S
"\xC3\xA0" => 'a', // LATIN SMALL LETTER A WITH GRAVE
"\xC3\xA1" => 'a', // LATIN SMALL LETTER A WITH ACUTE
"\xC3\xA2" => 'a', // LATIN SMALL LETTER A WITH CIRCUMFLEX
"\xC3\xA3" => 'a', // LATIN SMALL LETTER A WITH TILDE
"\xC3\xA4" => 'a', // LATIN SMALL LETTER A WITH DIAERESIS
"\xC3\xA5" => 'a', // LATIN SMALL LETTER A WITH RING ABOVE
"\xC3\xA6" => 'ae', // LATIN SMALL LETTER AE
"\xC3\xA7" => 'c', // LATIN SMALL LETTER C WITH CEDILLA
"\xC3\xA8" => 'e', // LATIN SMALL LETTER E WITH GRAVE
"\xC3\xA9" => 'e', // LATIN SMALL LETTER E WITH ACUTE
"\xC3\xAA" => 'e', // LATIN SMALL LETTER E WITH CIRCUMFLEX
"\xC3\xAB" => 'e', // LATIN SMALL LETTER E WITH DIAERESIS
"\xC3\xAC" => 'i', // LATIN SMALL LETTER I WITH GRAVE
"\xC3\xAD" => 'i', // LATIN SMALL LETTER I WITH ACUTE
"\xC3\xAE" => 'i', // LATIN SMALL LETTER I WITH CIRCUMFLEX
"\xC3\xAF" => 'i', // LATIN SMALL LETTER I WITH DIAERESIS
"\xC3\xB1" => 'n', // LATIN SMALL LETTER N WITH TILDE
"\xC3\xB2" => 'o', // LATIN SMALL LETTER O WITH GRAVE
"\xC3\xB3" => 'o', // LATIN SMALL LETTER O WITH ACUTE
"\xC3\xB4" => 'o', // LATIN SMALL LETTER O WITH CIRCUMFLEX
"\xC3\xB5" => 'o', // LATIN SMALL LETTER O WITH TILDE
"\xC3\xB6" => 'o', // LATIN SMALL LETTER O WITH DIAERESIS
"\xC3\xB8" => 'o', // LATIN SMALL LETTER O WITH STROKE
"\xC3\xB9" => 'u', // LATIN SMALL LETTER U WITH GRAVE
"\xC3\xBA" => 'u', // LATIN SMALL LETTER U WITH ACUTE
"\xC3\xBB" => 'u', // LATIN SMALL LETTER U WITH CIRCUMFLEX
"\xC3\xBC" => 'u', // LATIN SMALL LETTER U WITH DIAERESIS
"\xC3\xBD" => 'y', // LATIN SMALL LETTER Y WITH ACUTE
"\xC3\xBF" => 'y', // LATIN SMALL LETTER Y WITH DIAERESIS
"\xC4\x80" => 'A', // LATIN CAPITAL LETTER A WITH MACRON
"\xC4\x81" => 'a', // LATIN SMALL LETTER A WITH MACRON
"\xC4\x82" => 'A', // LATIN CAPITAL LETTER A WITH BREVE
"\xC4\x83" => 'a', // LATIN SMALL LETTER A WITH BREVE
"\xC4\x84" => 'A', // LATIN CAPITAL LETTER A WITH OGONEK
"\xC4\x85" => 'a', // LATIN SMALL LETTER A WITH OGONEK
"\xC4\x86" => 'C', // LATIN CAPITAL LETTER C WITH ACUTE
"\xC4\x87" => 'c', // LATIN SMALL LETTER C WITH ACUTE
"\xC4\x88" => 'C', // LATIN CAPITAL LETTER C WITH CIRCUMFLEX
"\xC4\x89" => 'c', // LATIN SMALL LETTER C WITH CIRCUMFLEX
"\xC4\x8A" => 'C', // LATIN CAPITAL LETTER C WITH DOT ABOVE
"\xC4\x8B" => 'c', // LATIN SMALL LETTER C WITH DOT ABOVE
"\xC4\x8C" => 'C', // LATIN CAPITAL LETTER C WITH CARON
"\xC4\x8D" => 'c', // LATIN SMALL LETTER C WITH CARON
"\xC4\x8E" => 'D', // LATIN CAPITAL LETTER D WITH CARON
"\xC4\x8F" => 'd', // LATIN SMALL LETTER D WITH CARON
"\xC4\x90" => 'D', // LATIN CAPITAL LETTER D WITH STROKE
"\xC4\x91" => 'd', // LATIN SMALL LETTER D WITH STROKE
"\xC4\x92" => 'E', // LATIN CAPITAL LETTER E WITH MACRON
"\xC4\x93" => 'e', // LATIN SMALL LETTER E WITH MACRON
"\xC4\x94" => 'E', // LATIN CAPITAL LETTER E WITH BREVE
"\xC4\x95" => 'e', // LATIN SMALL LETTER E WITH BREVE
"\xC4\x96" => 'E', // LATIN CAPITAL LETTER E WITH DOT ABOVE
"\xC4\x97" => 'e', // LATIN SMALL LETTER E WITH DOT ABOVE
"\xC4\x98" => 'E', // LATIN CAPITAL LETTER E WITH OGONEK
"\xC4\x99" => 'e', // LATIN SMALL LETTER E WITH OGONEK
"\xC4\x9A" => 'E', // LATIN CAPITAL LETTER E WITH CARON
"\xC4\x9B" => 'e', // LATIN SMALL LETTER E WITH CARON
"\xC4\x9C" => 'G', // LATIN CAPITAL LETTER G WITH CIRCUMFLEX
"\xC4\x9D" => 'g', // LATIN SMALL LETTER G WITH CIRCUMFLEX
"\xC4\x9E" => 'G', // LATIN CAPITAL LETTER G WITH BREVE
"\xC4\x9F" => 'g', // LATIN SMALL LETTER G WITH BREVE
"\xC4\xA0" => 'G', // LATIN CAPITAL LETTER G WITH DOT ABOVE
"\xC4\xA1" => 'g', // LATIN SMALL LETTER G WITH DOT ABOVE
"\xC4\xA2" => 'G', // LATIN CAPITAL LETTER G WITH CEDILLA
"\xC4\xA3" => 'g', // LATIN SMALL LETTER G WITH CEDILLA
"\xC4\xA4" => 'H', // LATIN CAPITAL LETTER H WITH CIRCUMFLEX
"\xC4\xA5" => 'h', // LATIN SMALL LETTER H WITH CIRCUMFLEX
"\xC4\xA6" => 'H', // LATIN CAPITAL LETTER H WITH STROKE
"\xC4\xA7" => 'h', // LATIN SMALL LETTER H WITH STROKE
"\xC4\xA8" => 'I', // LATIN CAPITAL LETTER I WITH TILDE
"\xC4\xA9" => 'i', // LATIN SMALL LETTER I WITH TILDE
"\xC4\xAA" => 'I', // LATIN CAPITAL LETTER I WITH MACRON
"\xC4\xAB" => 'i', // LATIN SMALL LETTER I WITH MACRON
"\xC4\xAC" => 'I', // LATIN CAPITAL LETTER I WITH BREVE
"\xC4\xAD" => 'i', // LATIN SMALL LETTER I WITH BREVE
"\xC4\xAE" => 'I', // LATIN CAPITAL LETTER I WITH OGONEK
"\xC4\xAF" => 'i', // LATIN SMALL LETTER I WITH OGONEK
"\xC4\xB0" => 'I', // LATIN CAPITAL LETTER I WITH DOT ABOVE
"\xC4\xB1" => 'i', // LATIN SMALL LETTER DOTLESS I
"\xC4\xB2" => 'IJ', // LATIN CAPITAL LIGATURE IJ
"\xC4\xB3" => 'ij', // LATIN SMALL LIGATURE IJ
"\xC4\xB4" => 'j', // LATIN CAPITAL LETTER J WITH CIRCUMFLEX
"\xC4\xB5" => 'j', // LATIN SMALL LETTER J WITH CIRCUMFLEX
"\xC4\xB6" => 'K', // LATIN CAPITAL LETTER K WITH CEDILLA
"\xC4\xB7" => 'k', // LATIN SMALL LETTER K WITH CEDILLA
"\xC4\xB9" => 'L', // LATIN CAPITAL LETTER L WITH ACUTE
"\xC4\xBA" => 'l', // LATIN SMALL LETTER L WITH ACUTE
"\xC4\xBB" => 'L', // LATIN CAPITAL LETTER L WITH CEDILLA
"\xC4\xBC" => 'l', // LATIN SMALL LETTER L WITH CEDILLA
"\xC4\xBD" => 'L', // LATIN CAPITAL LETTER L WITH CARON
"\xC4\xBE" => 'l', // LATIN SMALL LETTER L WITH CARON
"\xC4\xBF" => 'L', // LATIN CAPITAL LETTER L WITH MIDDLE DOT
"\xC5\x80" => 'l', // LATIN SMALL LETTER L WITH MIDDLE DOT
"\xC5\x81" => 'L', // LATIN CAPITAL LETTER L WITH STROKE
"\xC5\x82" => 'l', // LATIN SMALL LETTER L WITH STROKE
"\xC5\x83" => 'N', // LATIN CAPITAL LETTER N WITH ACUTE
"\xC5\x84" => 'n', // LATIN SMALL LETTER N WITH ACUTE
"\xC5\x85" => 'N', // LATIN CAPITAL LETTER N WITH CEDILLA
"\xC5\x86" => 'n', // LATIN SMALL LETTER N WITH CEDILLA
"\xC5\x87" => 'N', // LATIN CAPITAL LETTER N WITH CARON
"\xC5\x88" => 'n', // LATIN SMALL LETTER N WITH CARON
"\xC5\x8C" => 'O', // LATIN CAPITAL LETTER O WITH MACRON
"\xC5\x8D" => 'o', // LATIN SMALL LETTER O WITH MACRON
"\xC5\x8E" => 'O', // LATIN CAPITAL LETTER O WITH BREVE
"\xC5\x8F" => 'o', // LATIN SMALL LETTER O WITH BREVE
"\xC5\x90" => 'O', // LATIN CAPITAL LETTER O WITH DOUBLE ACUTE
"\xC5\x91" => 'o', // LATIN SMALL LETTER O WITH DOUBLE ACUTE
"\xC5\x92" => 'OE', // LATIN CAPITAL LIGATURE OE
"\xC5\x93" => 'oe', // LATIN SMALL LIGATURE OE
"\xC5\x94" => 'R', // LATIN CAPITAL LETTER R WITH ACUTE
"\xC5\x95" => 'r', // LATIN SMALL LETTER R WITH ACUTE
"\xC5\x96" => 'R', // LATIN CAPITAL LETTER R WITH CEDILLA
"\xC5\x97" => 'r', // LATIN SMALL LETTER R WITH CEDILLA
"\xC5\x98" => 'R', // LATIN CAPITAL LETTER R WITH CARON
"\xC5\x99" => 'r', // LATIN SMALL LETTER R WITH CARON
"\xC5\x9A" => 'S', // LATIN CAPITAL LETTER S WITH ACUTE
"\xC5\x9B" => 's', // LATIN SMALL LETTER S WITH ACUTE
"\xC5\x9C" => 'S', // LATIN CAPITAL LETTER S WITH CIRCUMFLEX
"\xC5\x9D" => 's', // LATIN SMALL LETTER S WITH CIRCUMFLEX
"\xC5\x9E" => 'S', // LATIN CAPITAL LETTER S WITH CEDILLA
"\xC5\x9F" => 's', // LATIN SMALL LETTER S WITH CEDILLA
"\xC5\xA0" => 'S', // LATIN CAPITAL LETTER S WITH CARON
"\xC5\xA1" => 's', // LATIN SMALL LETTER S WITH CARON
"\xC5\xA2" => 'T', // LATIN CAPITAL LETTER T WITH CEDILLA
"\xC5\xA3" => 't', // LATIN SMALL LETTER T WITH CEDILLA
"\xC5\xA4" => 'T', // LATIN CAPITAL LETTER T WITH CARON
"\xC5\xA5" => 't', // LATIN SMALL LETTER T WITH CARON
"\xC5\xA6" => 'T', // LATIN CAPITAL LETTER T WITH STROKE
"\xC5\xA7" => 't', // LATIN SMALL LETTER T WITH STROKE
"\xC5\xA8" => 'U', // LATIN CAPITAL LETTER U WITH TILDE
"\xC5\xA9" => 'u', // LATIN SMALL LETTER U WITH TILDE
"\xC5\xAA" => 'U', // LATIN CAPITAL LETTER U WITH MACRON
"\xC5\xAB" => 'u', // LATIN SMALL LETTER U WITH MACRON
"\xC5\xAC" => 'U', // LATIN CAPITAL LETTER U WITH BREVE
"\xC5\xAD" => 'u', // LATIN SMALL LETTER U WITH BREVE
"\xC5\xAE" => 'U', // LATIN CAPITAL LETTER U WITH RING ABOVE
"\xC5\xAF" => 'u', // LATIN SMALL LETTER U WITH RING ABOVE
"\xC5\xB0" => 'U', // LATIN CAPITAL LETTER U WITH DOUBLE ACUTE
"\xC5\xB1" => 'u', // LATIN SMALL LETTER U WITH DOUBLE ACUTE
"\xC5\xB2" => 'U', // LATIN CAPITAL LETTER U WITH OGONEK
"\xC5\xB3" => 'u', // LATIN SMALL LETTER U WITH OGONEK
"\xC5\xB4" => 'W', // LATIN CAPITAL LETTER W WITH CIRCUMFLEX
"\xC5\xB5" => 'w', // LATIN SMALL LETTER W WITH CIRCUMFLEX
"\xC5\xB6" => 'Y', // LATIN CAPITAL LETTER Y WITH CIRCUMFLEX
"\xC5\xB7" => 'y', // LATIN SMALL LETTER Y WITH CIRCUMFLEX
"\xC5\xB8" => 'Y', // LATIN CAPITAL LETTER Y WITH DIAERESIS
"\xC5\xB9" => 'Z', // LATIN CAPITAL LETTER Z WITH ACUTE
"\xC5\xBA" => 'z', // LATIN SMALL LETTER Z WITH ACUTE
"\xC5\xBB" => 'Z', // LATIN CAPITAL LETTER Z WITH DOT ABOVE
"\xC5\xBC" => 'z', // LATIN SMALL LETTER Z WITH DOT ABOVE
"\xC5\xBD" => 'Z', // LATIN CAPITAL LETTER Z WITH CARON
"\xC5\xBE" => 'z', // LATIN SMALL LETTER Z WITH CARON
"\xC6\x80" => 'b', // LATIN SMALL LETTER B WITH STROKE
"\xC6\x81" => 'B', // LATIN CAPITAL LETTER B WITH HOOK
"\xC6\x82" => 'B', // LATIN CAPITAL LETTER B WITH TOPBAR
"\xC6\x83" => 'b', // LATIN SMALL LETTER B WITH TOPBAR
"\xC6\x87" => 'C', // LATIN CAPITAL LETTER C WITH HOOK
"\xC6\x88" => 'c', // LATIN SMALL LETTER C WITH HOOK
"\xC6\x89" => 'D', // LATIN CAPITAL LETTER AFRICAN D
"\xC6\x8A" => 'D', // LATIN CAPITAL LETTER D WITH HOOK
"\xC6\x8B" => 'D', // LATIN CAPITAL LETTER D WITH TOPBAR
"\xC6\x8C" => 'd', // LATIN SMALL LETTER D WITH TOPBAR
"\xC6\x91" => 'F', // LATIN CAPITAL LETTER F WITH HOOK
"\xC6\x92" => 'f', // LATIN SMALL LETTER F WITH HOOK
"\xC6\x93" => 'G', // LATIN CAPITAL LETTER G WITH HOOKU+0195
"\xC6\x97" => 'I', // LATIN CAPITAL LETTER I WITH STROKE
"\xC6\x98" => 'K', // LATIN CAPITAL LETTER K WITH HOOK
"\xC6\x99" => 'k', // LATIN SMALL LETTER K WITH HOOK
"\xC6\x9A" => 'l', // LATIN SMALL LETTER L WITH BAR
"\xC6\x9D" => 'N', // LATIN CAPITAL LETTER N WITH LEFT HOOK
"\xC6\x9E" => 'n', // LATIN SMALL LETTER N WITH LONG RIGHT LEG
"\xC6\x9F" => 'O', // LATIN CAPITAL LETTER O WITH MIDDLE TILDE
"\xC6\xA0" => 'O', // LATIN CAPITAL LETTER O WITH HORN
"\xC6\xA1" => 'o', // LATIN SMALL LETTER O WITH HORN
"\xC6\xA2" => 'OI', // LATIN CAPITAL LETTER OI
"\xC6\xA3" => 'oi', // LATIN SMALL LETTER OI
"\xC6\xA4" => 'P', // LATIN CAPITAL LETTER P WITH HOOK
"\xC6\xA5" => 'p', // LATIN SMALL LETTER P WITH HOOK
"\xC6\xAB" => 't', // LATIN SMALL LETTER T WITH PALATAL HOOK
"\xC6\xAC" => 'T', // LATIN CAPITAL LETTER T WITH HOOK
"\xC6\xAD" => 't', // LATIN SMALL LETTER T WITH HOOK
"\xC6\xAE" => 'T', // LATIN CAPITAL LETTER T WITH RETROFLEX HOOK
"\xC6\xAF" => 'U', // LATIN CAPITAL LETTER U WITH HORN
"\xC6\xB0" => 'u', // LATIN SMALL LETTER U WITH HORN
"\xC6\xB2" => 'V', // LATIN CAPITAL LETTER V WITH HOOK
"\xC6\xB3" => 'Y', // LATIN CAPITAL LETTER Y WITH HOOK
"\xC6\xB4" => 'y', // LATIN SMALL LETTER Y WITH HOOK
"\xC6\xB5" => 'Z', // LATIN CAPITAL LETTER Z WITH STROKE
"\xC6\xB6" => 'z', // LATIN SMALL LETTER Z WITH STROKE
"\xC7\x8D" => 'A', // LATIN CAPITAL LETTER A WITH CARON
"\xC7\x8E" => 'a', // LATIN SMALL LETTER A WITH CARON
"\xC7\x8F" => 'I', // LATIN CAPITAL LETTER I WITH CARON
"\xC7\x90" => 'i', // LATIN SMALL LETTER I WITH CARON
"\xC7\x91" => 'O', // LATIN CAPITAL LETTER O WITH CARON
"\xC7\x92" => 'o', // LATIN SMALL LETTER O WITH CARON
"\xC7\x93" => 'U', // LATIN CAPITAL LETTER U WITH CARON
"\xC7\x94" => 'u', // LATIN SMALL LETTER U WITH CARON
"\xC7\x95" => 'U', // LATIN CAPITAL LETTER U WITH DIAERESIS AND MACRON
"\xC7\x96" => 'u', // LATIN SMALL LETTER U WITH DIAERESIS AND MACRON
"\xC7\x97" => 'U', // LATIN CAPITAL LETTER U WITH DIAERESIS AND ACUTE
"\xC7\x98" => 'u', // LATIN SMALL LETTER U WITH DIAERESIS AND ACUTE
"\xC7\x99" => 'U', // LATIN CAPITAL LETTER U WITH DIAERESIS AND CARON
"\xC7\x9A" => 'u', // LATIN SMALL LETTER U WITH DIAERESIS AND CARON
"\xC7\x9B" => 'U', // LATIN CAPITAL LETTER U WITH DIAERESIS AND GRAVE
"\xC7\x9C" => 'u', // LATIN SMALL LETTER U WITH DIAERESIS AND GRAVE
"\xC7\x9E" => 'A', // LATIN CAPITAL LETTER A WITH DIAERESIS AND MACRON
"\xC7\x9F" => 'a', // LATIN SMALL LETTER A WITH DIAERESIS AND MACRON
"\xC7\xA0" => 'A', // LATIN CAPITAL LETTER A WITH DOT ABOVE AND MACRON
"\xC7\xA1" => 'a', // LATIN SMALL LETTER A WITH DOT ABOVE AND MACRON
"\xC7\xA2" => 'AE', // LATIN CAPITAL LETTER AE WITH MACRON
"\xC7\xA3" => 'ae', // LATIN SMALL LETTER AE WITH MACRON
"\xC7\xA4" => 'G', // LATIN CAPITAL LETTER G WITH STROKE
"\xC7\xA5" => 'g', // LATIN SMALL LETTER G WITH STROKE
"\xC7\xA6" => 'G', // LATIN CAPITAL LETTER G WITH CARON
"\xC7\xA7" => 'g', // LATIN SMALL LETTER G WITH CARON
"\xC7\xA8" => 'K', // LATIN CAPITAL LETTER K WITH CARON
"\xC7\xA9" => 'k', // LATIN SMALL LETTER K WITH CARON
"\xC7\xAA" => 'O', // LATIN CAPITAL LETTER O WITH OGONEK
"\xC7\xAB" => 'o', // LATIN SMALL LETTER O WITH OGONEK
"\xC7\xAC" => 'O', // LATIN CAPITAL LETTER O WITH OGONEK AND MACRON
"\xC7\xAD" => 'o', // LATIN SMALL LETTER O WITH OGONEK AND MACRON
"\xC7\xB0" => 'j', // LATIN SMALL LETTER J WITH CARON
"\xC7\xB4" => 'G', // LATIN CAPITAL LETTER G WITH ACUTE
"\xC7\xB5" => 'g', // LATIN SMALL LETTER G WITH ACUTE
"\xC7\xB8" => 'N', // LATIN CAPITAL LETTER N WITH GRAVE
"\xC7\xB9" => 'n', // LATIN SMALL LETTER N WITH GRAVE
"\xC7\xBA" => 'A', // LATIN CAPITAL LETTER A WITH RING ABOVE AND ACUTE
"\xC7\xBB" => 'a', // LATIN SMALL LETTER A WITH RING ABOVE AND ACUTE
"\xC7\xBC" => 'AE', // LATIN CAPITAL LETTER AE WITH ACUTE
"\xC7\xBD" => 'ae', // LATIN SMALL LETTER AE WITH ACUTE
"\xC7\xBE" => 'O', // LATIN CAPITAL LETTER O WITH STROKE AND ACUTE
"\xC7\xBF" => 'o', // LATIN SMALL LETTER O WITH STROKE AND ACUTE
"\xC8\x80" => 'A', // LATIN CAPITAL LETTER A WITH DOUBLE GRAVE
"\xC8\x81" => 'a', // LATIN SMALL LETTER A WITH DOUBLE GRAVE
"\xC8\x82" => 'A', // LATIN CAPITAL LETTER A WITH INVERTED BREVE
"\xC8\x83" => 'a', // LATIN SMALL LETTER A WITH INVERTED BREVE
"\xC8\x84" => 'E', // LATIN CAPITAL LETTER E WITH DOUBLE GRAVE
"\xC8\x85" => 'e', // LATIN SMALL LETTER E WITH DOUBLE GRAVE
"\xC8\x86" => 'E', // LATIN CAPITAL LETTER E WITH INVERTED BREVE
"\xC8\x87" => 'e', // LATIN SMALL LETTER E WITH INVERTED BREVE
"\xC8\x88" => 'I', // LATIN CAPITAL LETTER I WITH DOUBLE GRAVE
"\xC8\x89" => 'i', // LATIN SMALL LETTER I WITH DOUBLE GRAVE
"\xC8\x8A" => 'I', // LATIN CAPITAL LETTER I WITH INVERTED BREVE
"\xC8\x8B" => 'i', // LATIN SMALL LETTER I WITH INVERTED BREVE
"\xC8\x8C" => 'O', // LATIN CAPITAL LETTER O WITH DOUBLE GRAVE
"\xC8\x8D" => 'o', // LATIN SMALL LETTER O WITH DOUBLE GRAVE
"\xC8\x8E" => 'O', // LATIN CAPITAL LETTER O WITH INVERTED BREVE
"\xC8\x8F" => 'o', // LATIN SMALL LETTER O WITH INVERTED BREVE
"\xC8\x90" => 'R', // LATIN CAPITAL LETTER R WITH DOUBLE GRAVE
"\xC8\x91" => 'r', // LATIN SMALL LETTER R WITH DOUBLE GRAVE
"\xC8\x92" => 'R', // LATIN CAPITAL LETTER R WITH INVERTED BREVE
"\xC8\x93" => 'r', // LATIN SMALL LETTER R WITH INVERTED BREVE
"\xC8\x94" => 'U', // LATIN CAPITAL LETTER U WITH DOUBLE GRAVE
"\xC8\x95" => 'u', // LATIN SMALL LETTER U WITH DOUBLE GRAVE
"\xC8\x96" => 'U', // LATIN CAPITAL LETTER U WITH INVERTED BREVE
"\xC8\x97" => 'u', // LATIN SMALL LETTER U WITH INVERTED BREVE
"\xC8\x98" => 'S', // LATIN CAPITAL LETTER S WITH COMMA BELOW
"\xC8\x99" => 's', // LATIN SMALL LETTER S WITH COMMA BELOW
"\xC8\x9A" => 'T', // LATIN CAPITAL LETTER T WITH COMMA BELOW
"\xC8\x9B" => 't', // LATIN SMALL LETTER T WITH COMMA BELOW
"\xC8\x9E" => 'H', // LATIN CAPITAL LETTER H WITH CARON
"\xC8\x9F" => 'h', // LATIN SMALL LETTER H WITH CARON
"\xC8\xA0" => 'n', // LATIN CAPITAL LETTER N WITH LONG RIGHT LEG
"\xC8\xA1" => 'd', // LATIN SMALL LETTER D WITH CURL
"\xC8\xA4" => 'Z', // LATIN CAPITAL LETTER Z WITH HOOK
"\xC8\xA5" => 'z', // LATIN SMALL LETTER Z WITH HOOK
"\xC8\xA6" => 'A', // LATIN CAPITAL LETTER A WITH DOT ABOVE
"\xC8\xA7" => 'a', // LATIN SMALL LETTER A WITH DOT ABOVE
"\xC8\xA8" => 'E', // LATIN CAPITAL LETTER E WITH CEDILLA
"\xC8\xA9" => 'e', // LATIN SMALL LETTER E WITH CEDILLA
"\xC8\xAA" => 'O', // LATIN CAPITAL LETTER O WITH DIAERESIS AND MACRON
"\xC8\xAB" => 'o', // LATIN SMALL LETTER O WITH DIAERESIS AND MACRON
"\xC8\xAC" => 'O', // LATIN CAPITAL LETTER O WITH TILDE AND MACRON
"\xC8\xAD" => 'o', // LATIN SMALL LETTER O WITH TILDE AND MACRON
"\xC8\xAE" => 'O', // LATIN CAPITAL LETTER O WITH DOT ABOVE
"\xC8\xAF" => 'o', // LATIN SMALL LETTER O WITH DOT ABOVE
"\xC8\xB0" => 'O', // LATIN CAPITAL LETTER O WITH DOT ABOVE AND MACRON
"\xC8\xB1" => 'o', // LATIN SMALL LETTER O WITH DOT ABOVE AND MACRON
"\xC8\xB2" => 'Y', // LATIN CAPITAL LETTER Y WITH MACRON
"\xC8\xB3" => 'y', // LATIN SMALL LETTER Y WITH MACRON
"\xC8\xB4" => 'l', // LATIN SMALL LETTER L WITH CURL
"\xC8\xB5" => 'n', // LATIN SMALL LETTER N WITH CURL
"\xC8\xB6" => 't', // LATIN SMALL LETTER T WITH CURL
"\xC8\xB7" => 'j', // LATIN SMALL LETTER DOTLESS J
);
}
/**
* Return the UTF-8 input string converted into an array of words, changed $tolowercase (or not).
* Set $delimiters to true to keep the delimiters after each word and tweak what we used for word
* splitting with $splitideographs and $splithyphens.
* @param $string
* @param bool $tolowercase
* @param bool $delimiters
* @param bool $splitideographs
* @param bool $splithyphens
* @return array
*/
function qa_string_to_words($string, $tolowercase = true, $delimiters = false, $splitideographs = true, $splithyphens = true)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
global $qa_utf8punctuation;
if ($tolowercase)
$string = qa_strtolower($string);
$string = strtr($string, $qa_utf8punctuation);
$separator = QA_PREG_INDEX_WORD_SEPARATOR;
if ($splithyphens)
$separator .= '|\-';
if ($delimiters) {
if ($splitideographs)
$separator .= '|' . QA_PREG_CJK_IDEOGRAPHS_UTF8;
} else {
$string = preg_replace("/(\S)'(\S)/", '\1\2', $string); // remove apostrophes in words
if ($splitideographs) // put spaces around CJK ideographs so they're treated as separate words
$string = preg_replace('/' . QA_PREG_CJK_IDEOGRAPHS_UTF8 . '/', ' \0 ', $string);
}
return preg_split('/(' . $separator . '+)/', $string, -1, PREG_SPLIT_NO_EMPTY | ($delimiters ? PREG_SPLIT_DELIM_CAPTURE : 0));
}
/**
* Convert accents in a UTF-8 string to ASCII.
* @param string $string Input string.
* @return string
*/
function qa_string_remove_accents($string)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
global $qa_utf8removeaccents;
return strtr($string, $qa_utf8removeaccents);
}
/**
* Convert string to an SEO-friendly URL segment.
* @param string $string Input string.
* @param bool $asciiOnly If true, removes all non-ASCII characters that weren't converted.
* @param int|null $maxLength Maximum length the segment should be, or null for no limit.
* @return string
*/
function qa_slugify($string, $asciiOnly = true, $maxLength = null)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
$words = qa_string_to_words($string, true, false, false);
if ($maxLength !== null) {
$wordlength = array();
foreach ($words as $index => $word) {
$wordlength[$index] = qa_strlen($word);
}
$remaining = $maxLength;
if (array_sum($wordlength) > $remaining) {
arsort($wordlength, SORT_NUMERIC); // sort with longest words first
foreach ($wordlength as $index => $length) {
if ($remaining > 0) {
$remaining -= $length;
} else {
unset($words[$index]);
}
}
}
}
$string = implode('-', $words);
if ($asciiOnly) {
// convert accents to ASCII, then remove all remaining non-ASCII characters
$string = qa_string_remove_accents($string);
$string = preg_replace('/[^ a-zA-Z0-9-]/', '', $string);
$string = preg_replace('/-{2,}/', '-', trim($string, '-'));
}
return $string;
}
/**
* Convert an array of tags into a string for storage in the database
* @param $tags
* @return mixed|string
*/
function qa_tags_to_tagstring($tags)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
return implode(',', $tags);
}
/**
* Convert a tag string as stored in the database into an array of tags
* @param $tagstring
* @return array|mixed
*/
function qa_tagstring_to_tags($tagstring)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
return empty($tagstring) ? array() : explode(',', $tagstring);
}
/**
* Converts a string to a single line and removes words from it until it fits in the given length. Words are removed
* from a position around two thirds of the string and are replaced by the given ellipsis string
*
* @param string $string Text that will be turned into a single line and cut, if necessary
* @param int $length Maximum allowed length of the returned string. This value can be overriden by the length of the
* ellipsis if it is higher than the maximum allowed length
* @param string $ellipsis Text used to replace the removed words from the original text
* @return string The string turned into a single line and cut to fit the given length
*/
function qa_shorten_string_line($string, $length, $ellipsis = ' ... ')
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
$string = strtr($string, "\r\n\t", ' ');
if (qa_strlen($string) > $length) {
$remaining = $length - qa_strlen($ellipsis);
$words = qa_string_to_words($string, false, true);
$countwords = count($words);
$prefix = '';
$suffix = '';
for ($addword = 0; $addword < $countwords; $addword++) {
$tosuffix = $addword % 3 == 1; // order: prefix, suffix, prefix, prefix, suffix, prefix, ...
$word = $tosuffix ? array_pop($words) : array_shift($words);
$wordLength = qa_strlen($word);
if ($wordLength > $remaining)
break;
if ($tosuffix)
$suffix = $word . $suffix;
else
$prefix .= $word;
$remaining -= $wordLength;
}
$string = $prefix . $ellipsis . $suffix;
}
return $string;
}
/**
* Removes 4-byte Unicode characters (e.g. emoji) from a string due to missing support in MySQL < 5.5.3.
* @param string $string
* @return string
*/
function qa_remove_utf8mb4($string)
{
return preg_replace('%(?:
\xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
)%xs', '', $string);
}
/**
* Return an array of the words within $wordstring, each of which can contain asterisks
* @param $wordstring
* @return array|mixed
*/
function qa_block_words_explode($wordstring)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
return preg_split('/' . QA_PREG_BLOCK_WORD_SEPARATOR . '+/', $wordstring, -1, PREG_SPLIT_NO_EMPTY);
}
/**
* Return a regular expression fragment corresponding to the block words $wordstring
* @param $wordsstring
* @return mixed|string
*/
function qa_block_words_to_preg($wordsstring)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
$blockwords = qa_block_words_explode($wordsstring);
$patterns = array();
foreach ($blockwords as $blockword) { // * in rule maps to [^ ]* in regular expression
$pattern = str_replace('\\*', '[^ ]*', preg_quote(qa_strtolower($blockword), '/'));
if (!preg_match('/^(' . QA_PREG_CJK_IDEOGRAPHS_UTF8 . ')/', $blockword))
$pattern = '(?<= )' . $pattern; // assert leading word delimiter if pattern does not start with CJK
if (!preg_match('/(' . QA_PREG_CJK_IDEOGRAPHS_UTF8 . ')$/', $blockword))
$pattern = $pattern . '(?= )'; // assert trailing word delimiter if pattern does not end with CJK
$patterns[] = $pattern;
}
return implode('|', $patterns);
}
/**
* Return an array of matches of the regular expression fragment $wordspreg in $string, [offset] => [length]
* @param $string
* @param $wordspreg
* @return array
*/
function qa_block_words_match_all($string, $wordspreg)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
global $qa_utf8punctuation, $qa_utf8punctuation_keeplength;
if (strlen($wordspreg)) {
// replace all word separators with spaces of same length
if (!is_array($qa_utf8punctuation_keeplength)) {
$qa_utf8punctuation_keeplength = array();
foreach ($qa_utf8punctuation as $key => $value)
$qa_utf8punctuation_keeplength[$key] = str_repeat(' ', strlen($key));
}
// assumes UTF-8 case conversion in qa_strtolower does not change byte length
$string = strtr(qa_strtolower($string), $qa_utf8punctuation_keeplength);
$string = preg_replace('/' . QA_PREG_BLOCK_WORD_SEPARATOR . '/', ' ', $string);
preg_match_all('/' . $wordspreg . '/', ' ' . $string . ' ', $pregmatches, PREG_OFFSET_CAPTURE);
$outmatches = array();
foreach ($pregmatches[0] as $pregmatch)
$outmatches[$pregmatch[1] - 1] = strlen($pregmatch[0]);
return $outmatches;
}
return array();
}
/**
* Return $string with any words matching the regular expression fragment $wordspreg replaced with repeated $character
* @param string $string
* @param string $wordspreg
* @param string $character
* @return mixed
*/
function qa_block_words_replace($string, $wordspreg, $character = '*')
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
if (strlen($wordspreg)) {
$matches = qa_block_words_match_all($string, $wordspreg);
krsort($matches, SORT_NUMERIC);
foreach ($matches as $start => $length) // get length again below to deal with multi-byte characters
$string = substr_replace($string, str_repeat($character, qa_strlen(substr($string, $start, $length))), $start, $length);
}
return $string;
}
/**
* Return a random alphanumeric string (base 36) of $length
* @param $length
* @return string
*/
function qa_random_alphanum($length)
{
$string = '';
while (strlen($string) < $length)
$string .= str_pad(base_convert(mt_rand(0, 46655), 10, 36), 3, '0', STR_PAD_LEFT);
return substr($string, 0, $length);
}
/**
* Return true or false to indicate whether $email is a valid email (this is pretty flexible compared to most real emails out there)
* @param $email
* @return bool|mixed
*/
function qa_email_validate($email)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
return (bool)filter_var($email, FILTER_VALIDATE_EMAIL);
}
/**
* Return the number of characters in $string, preferably using PHP's multibyte string functions
* @param $string
* @return int|mixed
*/
function qa_strlen($string)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
return function_exists('mb_strlen') ? mb_strlen($string, 'UTF-8') : strlen($string);
}
/**
* Return a lower case version of $string, preferably using PHP's multibyte string functions
* @param $string
* @return mixed|string
*/
function qa_strtolower($string)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
return function_exists('mb_strtolower') ? mb_strtolower($string, 'UTF-8') : strtolower($string);
}
/**
* Return $length characters from $string, starting from $start, preferably using PHP's multibyte string functions
* @param $string
* @param $start
* @param int $length
* @return mixed|string
*/
function qa_substr($string, $start, $length = 2147483647)
{
if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
return function_exists('mb_substr') ? mb_substr($string, $start, $length, 'UTF-8') : substr($string, $start, $length);
}
/**
* Return whether this version of PHP has been compiled with multibyte string support
*/
function qa_has_multibyte()
{
return function_exists('mb_strlen') && function_exists('mb_strtolower');
}
/**
* Return true if at least one of the values in array $matches is a substring of $string. Otherwise, return false.
* @param $string
* @param $matches
* @return bool
*/
function qa_string_matches_one($string, $matches)
{
if (strlen($string)) {
foreach ($matches as $match) {
if (strpos($string, $match) !== false)
return true;
}
}
return false;
}
// Some static definitions and initialization
// Notable exclusions here: $ & - _ # % @
if (!defined('QA_PREG_INDEX_WORD_SEPARATOR')) {
define('QA_PREG_INDEX_WORD_SEPARATOR', '[\n\r\t\ \!\"\\\'\(\)\*\+\,\.\/\:\;\<\=\>\?\[\\\\\]\^\`\{\|\}\~]');
}
// Asterisk (*) excluded here because it's used to match anything
if (!defined('QA_PREG_BLOCK_WORD_SEPARATOR')) {
define('QA_PREG_BLOCK_WORD_SEPARATOR', '[\n\r\t\ \!\"\\\'\(\)\+\,\.\/\:\;\<\=\>\?\[\\\\\]\^\`\{\|\}\~\$\&\-\_\#\%\@]');
}
// Pattern to match Thai/Chinese/Japanese/Korean ideographic symbols in UTF-8 encoding
if (!defined('QA_PREG_CJK_IDEOGRAPHS_UTF8')) {
define('QA_PREG_CJK_IDEOGRAPHS_UTF8', '\xE0[\xB8-\xB9][\x80-\xBF]|\xE2[\xBA-\xBF][\x80-\xBF]|\xE3[\x80\x88-\xBF][\x80-\xBF]|[\xE4-\xE9][\x80-\xBF][\x80-\xBF]|\xEF[\xA4-\xAB][\x80-\xBF]|\xF0[\xA0-\xAF][\x80-\xBF][\x80-\xBF]');
}
qa_string_initialize();
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