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/PHPExcel/Shared/String.php

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PHP | 730 lines | 405 code | 58 blank | 267 comment | 65 complexity | 61b4885b1d5e801084daf5b3eae64c2a MD5 | raw file
  1<?php
  2/**
  3 * PHPExcel
  4 *
  5 * Copyright (c) 2006 - 2012 PHPExcel
  6 *
  7 * This library is free software; you can redistribute it and/or
  8 * modify it under the terms of the GNU Lesser General Public
  9 * License as published by the Free Software Foundation; either
 10 * version 2.1 of the License, or (at your option) any later version.
 11 *
 12 * This library is distributed in the hope that it will be useful,
 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 15 * Lesser General Public License for more details.
 16 *
 17 * You should have received a copy of the GNU Lesser General Public
 18 * License along with this library; if not, write to the Free Software
 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 20 *
 21 * @category   PHPExcel
 22 * @package    PHPExcel_Shared
 23 * @copyright  Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
 24 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 25 * @version    1.7.8, 2012-10-12
 26 */
 27
 28
 29/**
 30 * PHPExcel_Shared_String
 31 *
 32 * @category   PHPExcel
 33 * @package    PHPExcel_Shared
 34 * @copyright  Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
 35 */
 36class PHPExcel_Shared_String
 37{
 38	/**	Constants				*/
 39	/**	Regular Expressions		*/
 40	//	Fraction
 41	const STRING_REGEXP_FRACTION	= '(-?)(\d+)\s+(\d+\/\d+)';
 42
 43
 44	/**
 45	 * Control characters array
 46	 *
 47	 * @var string[]
 48	 */
 49	private static $_controlCharacters = array();
 50
 51	/**
 52	 * SYLK Characters array
 53	 *
 54	 * $var array
 55	 */
 56	private static $_SYLKCharacters = array();
 57
 58	/**
 59	 * Decimal separator
 60	 *
 61	 * @var string
 62	 */
 63	private static $_decimalSeparator;
 64
 65	/**
 66	 * Thousands separator
 67	 *
 68	 * @var string
 69	 */
 70	private static $_thousandsSeparator;
 71
 72	/**
 73	 * Currency code
 74	 *
 75	 * @var string
 76	 */
 77	private static $_currencyCode;
 78
 79	/**
 80	 * Is mbstring extension avalable?
 81	 *
 82	 * @var boolean
 83	 */
 84	private static $_isMbstringEnabled;
 85
 86	/**
 87	 * Is iconv extension avalable?
 88	 *
 89	 * @var boolean
 90	 */
 91	private static $_isIconvEnabled;
 92
 93	/**
 94	 * Build control characters array
 95	 */
 96	private static function _buildControlCharacters() {
 97		for ($i = 0; $i <= 31; ++$i) {
 98			if ($i != 9 && $i != 10 && $i != 13) {
 99				$find = '_x' . sprintf('%04s' , strtoupper(dechex($i))) . '_';
100				$replace = chr($i);
101				self::$_controlCharacters[$find] = $replace;
102			}
103		}
104	}
105
106	/**
107	 * Build SYLK characters array
108	 */
109	private static function _buildSYLKCharacters()
110	{
111		self::$_SYLKCharacters = array(
112			"\x1B 0"  => chr(0),
113			"\x1B 1"  => chr(1),
114			"\x1B 2"  => chr(2),
115			"\x1B 3"  => chr(3),
116			"\x1B 4"  => chr(4),
117			"\x1B 5"  => chr(5),
118			"\x1B 6"  => chr(6),
119			"\x1B 7"  => chr(7),
120			"\x1B 8"  => chr(8),
121			"\x1B 9"  => chr(9),
122			"\x1B :"  => chr(10),
123			"\x1B ;"  => chr(11),
124			"\x1B <"  => chr(12),
125			"\x1B :"  => chr(13),
126			"\x1B >"  => chr(14),
127			"\x1B ?"  => chr(15),
128			"\x1B!0"  => chr(16),
129			"\x1B!1"  => chr(17),
130			"\x1B!2"  => chr(18),
131			"\x1B!3"  => chr(19),
132			"\x1B!4"  => chr(20),
133			"\x1B!5"  => chr(21),
134			"\x1B!6"  => chr(22),
135			"\x1B!7"  => chr(23),
136			"\x1B!8"  => chr(24),
137			"\x1B!9"  => chr(25),
138			"\x1B!:"  => chr(26),
139			"\x1B!;"  => chr(27),
140			"\x1B!<"  => chr(28),
141			"\x1B!="  => chr(29),
142			"\x1B!>"  => chr(30),
143			"\x1B!?"  => chr(31),
144			"\x1B'?"  => chr(127),
145			"\x1B(0"  => '€', // 128 in CP1252
146			"\x1B(2"  => '‚', // 130 in CP1252
147			"\x1B(3"  => 'ƒ', // 131 in CP1252
148			"\x1B(4"  => '„', // 132 in CP1252
149			"\x1B(5"  => '…', // 133 in CP1252
150			"\x1B(6"  => '†', // 134 in CP1252
151			"\x1B(7"  => '‡', // 135 in CP1252
152			"\x1B(8"  => 'ˆ', // 136 in CP1252
153			"\x1B(9"  => '‰', // 137 in CP1252
154			"\x1B(:"  => 'Š', // 138 in CP1252
155			"\x1B(;"  => '‹', // 139 in CP1252
156			"\x1BNj"  => 'Œ', // 140 in CP1252
157			"\x1B(>"  => 'Ž', // 142 in CP1252
158			"\x1B)1"  => '‘', // 145 in CP1252
159			"\x1B)2"  => '’', // 146 in CP1252
160			"\x1B)3"  => '“', // 147 in CP1252
161			"\x1B)4"  => '”', // 148 in CP1252
162			"\x1B)5"  => '•', // 149 in CP1252
163			"\x1B)6"  => '–', // 150 in CP1252
164			"\x1B)7"  => '—', // 151 in CP1252
165			"\x1B)8"  => '˜', // 152 in CP1252
166			"\x1B)9"  => '™', // 153 in CP1252
167			"\x1B):"  => 'š', // 154 in CP1252
168			"\x1B);"  => '›', // 155 in CP1252
169			"\x1BNz"  => 'œ', // 156 in CP1252
170			"\x1B)>"  => 'ž', // 158 in CP1252
171			"\x1B)?"  => 'Ÿ', // 159 in CP1252
172			"\x1B*0"  => ' ', // 160 in CP1252
173			"\x1BN!"  => '¡', // 161 in CP1252
174			"\x1BN\"" => '¢', // 162 in CP1252
175			"\x1BN#"  => '£', // 163 in CP1252
176			"\x1BN("  => '¤', // 164 in CP1252
177			"\x1BN%"  => '¥', // 165 in CP1252
178			"\x1B*6"  => '¦', // 166 in CP1252
179			"\x1BN'"  => '§', // 167 in CP1252
180			"\x1BNH " => '¨', // 168 in CP1252
181			"\x1BNS"  => '©', // 169 in CP1252
182			"\x1BNc"  => 'ª', // 170 in CP1252
183			"\x1BN+"  => '«', // 171 in CP1252
184			"\x1B*<"  => '¬', // 172 in CP1252
185			"\x1B*="  => '­', // 173 in CP1252
186			"\x1BNR"  => '®', // 174 in CP1252
187			"\x1B*?"  => '¯', // 175 in CP1252
188			"\x1BN0"  => '°', // 176 in CP1252
189			"\x1BN1"  => '±', // 177 in CP1252
190			"\x1BN2"  => '²', // 178 in CP1252
191			"\x1BN3"  => '³', // 179 in CP1252
192			"\x1BNB " => '´', // 180 in CP1252
193			"\x1BN5"  => 'µ', // 181 in CP1252
194			"\x1BN6"  => '¶', // 182 in CP1252
195			"\x1BN7"  => '·', // 183 in CP1252
196			"\x1B+8"  => '¸', // 184 in CP1252
197			"\x1BNQ"  => '¹', // 185 in CP1252
198			"\x1BNk"  => 'º', // 186 in CP1252
199			"\x1BN;"  => '»', // 187 in CP1252
200			"\x1BN<"  => '¼', // 188 in CP1252
201			"\x1BN="  => '½', // 189 in CP1252
202			"\x1BN>"  => '¾', // 190 in CP1252
203			"\x1BN?"  => '¿', // 191 in CP1252
204			"\x1BNAA" => 'À', // 192 in CP1252
205			"\x1BNBA" => 'Á', // 193 in CP1252
206			"\x1BNCA" => 'Â', // 194 in CP1252
207			"\x1BNDA" => 'Ã', // 195 in CP1252
208			"\x1BNHA" => 'Ä', // 196 in CP1252
209			"\x1BNJA" => 'Å', // 197 in CP1252
210			"\x1BNa"  => 'Æ', // 198 in CP1252
211			"\x1BNKC" => 'Ç', // 199 in CP1252
212			"\x1BNAE" => 'È', // 200 in CP1252
213			"\x1BNBE" => 'É', // 201 in CP1252
214			"\x1BNCE" => 'Ê', // 202 in CP1252
215			"\x1BNHE" => 'Ë', // 203 in CP1252
216			"\x1BNAI" => 'Ì', // 204 in CP1252
217			"\x1BNBI" => 'Í', // 205 in CP1252
218			"\x1BNCI" => 'Î', // 206 in CP1252
219			"\x1BNHI" => 'Ï', // 207 in CP1252
220			"\x1BNb"  => 'Ð', // 208 in CP1252
221			"\x1BNDN" => 'Ñ', // 209 in CP1252
222			"\x1BNAO" => 'Ò', // 210 in CP1252
223			"\x1BNBO" => 'Ó', // 211 in CP1252
224			"\x1BNCO" => 'Ô', // 212 in CP1252
225			"\x1BNDO" => 'Õ', // 213 in CP1252
226			"\x1BNHO" => 'Ö', // 214 in CP1252
227			"\x1B-7"  => '×', // 215 in CP1252
228			"\x1BNi"  => 'Ø', // 216 in CP1252
229			"\x1BNAU" => 'Ù', // 217 in CP1252
230			"\x1BNBU" => 'Ú', // 218 in CP1252
231			"\x1BNCU" => 'Û', // 219 in CP1252
232			"\x1BNHU" => 'Ü', // 220 in CP1252
233			"\x1B-="  => 'Ý', // 221 in CP1252
234			"\x1BNl"  => 'Þ', // 222 in CP1252
235			"\x1BN{"  => 'ß', // 223 in CP1252
236			"\x1BNAa" => 'à', // 224 in CP1252
237			"\x1BNBa" => 'á', // 225 in CP1252
238			"\x1BNCa" => 'â', // 226 in CP1252
239			"\x1BNDa" => 'ã', // 227 in CP1252
240			"\x1BNHa" => 'ä', // 228 in CP1252
241			"\x1BNJa" => 'å', // 229 in CP1252
242			"\x1BNq"  => 'æ', // 230 in CP1252
243			"\x1BNKc" => 'ç', // 231 in CP1252
244			"\x1BNAe" => 'è', // 232 in CP1252
245			"\x1BNBe" => 'é', // 233 in CP1252
246			"\x1BNCe" => 'ê', // 234 in CP1252
247			"\x1BNHe" => 'ë', // 235 in CP1252
248			"\x1BNAi" => 'ì', // 236 in CP1252
249			"\x1BNBi" => 'í', // 237 in CP1252
250			"\x1BNCi" => 'î', // 238 in CP1252
251			"\x1BNHi" => 'ï', // 239 in CP1252
252			"\x1BNs"  => 'ð', // 240 in CP1252
253			"\x1BNDn" => 'ñ', // 241 in CP1252
254			"\x1BNAo" => 'ò', // 242 in CP1252
255			"\x1BNBo" => 'ó', // 243 in CP1252
256			"\x1BNCo" => 'ô', // 244 in CP1252
257			"\x1BNDo" => 'õ', // 245 in CP1252
258			"\x1BNHo" => 'ö', // 246 in CP1252
259			"\x1B/7"  => '÷', // 247 in CP1252
260			"\x1BNy"  => 'ø', // 248 in CP1252
261			"\x1BNAu" => 'ù', // 249 in CP1252
262			"\x1BNBu" => 'ú', // 250 in CP1252
263			"\x1BNCu" => 'û', // 251 in CP1252
264			"\x1BNHu" => 'ü', // 252 in CP1252
265			"\x1B/="  => 'ý', // 253 in CP1252
266			"\x1BN|"  => 'þ', // 254 in CP1252
267			"\x1BNHy" => 'ÿ', // 255 in CP1252
268		);
269	}
270
271	/**
272	 * Get whether mbstring extension is available
273	 *
274	 * @return boolean
275	 */
276	public static function getIsMbstringEnabled()
277	{
278		if (isset(self::$_isMbstringEnabled)) {
279			return self::$_isMbstringEnabled;
280		}
281
282		self::$_isMbstringEnabled = function_exists('mb_convert_encoding') ?
283			true : false;
284
285		return self::$_isMbstringEnabled;
286	}
287
288	/**
289	 * Get whether iconv extension is available
290	 *
291	 * @return boolean
292	 */
293	public static function getIsIconvEnabled()
294	{
295		if (isset(self::$_isIconvEnabled)) {
296			return self::$_isIconvEnabled;
297		}
298
299		// Fail if iconv doesn't exist
300		if (!function_exists('iconv')) {
301			self::$_isIconvEnabled = false;
302			return false;
303		}
304
305		// Sometimes iconv is not working, and e.g. iconv('UTF-8', 'UTF-16LE', 'x') just returns false,
306		if (!@iconv('UTF-8', 'UTF-16LE', 'x')) {
307			self::$_isIconvEnabled = false;
308			return false;
309		}
310
311		// Sometimes iconv_substr('A', 0, 1, 'UTF-8') just returns false in PHP 5.2.0
312		// we cannot use iconv in that case either (http://bugs.php.net/bug.php?id=37773)
313		if (!@iconv_substr('A', 0, 1, 'UTF-8')) {
314			self::$_isIconvEnabled = false;
315			return false;
316		}
317
318		// CUSTOM: IBM AIX iconv() does not work
319		if ( defined('PHP_OS') && @stristr(PHP_OS, 'AIX')
320				&& defined('ICONV_IMPL') && (@strcasecmp(ICONV_IMPL, 'unknown') == 0)
321				&& defined('ICONV_VERSION') && (@strcasecmp(ICONV_VERSION, 'unknown') == 0) )
322		{
323			self::$_isIconvEnabled = false;
324			return false;
325		}
326
327		// If we reach here no problems were detected with iconv
328		self::$_isIconvEnabled = true;
329		return true;
330	}
331
332	public static function buildCharacterSets() {
333		if(empty(self::$_controlCharacters)) {
334			self::_buildControlCharacters();
335		}
336		if(empty(self::$_SYLKCharacters)) {
337			self::_buildSYLKCharacters();
338		}
339	}
340
341	/**
342	 * Convert from OpenXML escaped control character to PHP control character
343	 *
344	 * Excel 2007 team:
345	 * ----------------
346	 * That's correct, control characters are stored directly in the shared-strings table.
347	 * We do encode characters that cannot be represented in XML using the following escape sequence:
348	 * _xHHHH_ where H represents a hexadecimal character in the character's value...
349	 * So you could end up with something like _x0008_ in a string (either in a cell value (<v>)
350	 * element or in the shared string <t> element.
351	 *
352	 * @param 	string	$value	Value to unescape
353	 * @return 	string
354	 */
355	public static function ControlCharacterOOXML2PHP($value = '') {
356		return str_replace( array_keys(self::$_controlCharacters), array_values(self::$_controlCharacters), $value );
357	}
358
359	/**
360	 * Convert from PHP control character to OpenXML escaped control character
361	 *
362	 * Excel 2007 team:
363	 * ----------------
364	 * That's correct, control characters are stored directly in the shared-strings table.
365	 * We do encode characters that cannot be represented in XML using the following escape sequence:
366	 * _xHHHH_ where H represents a hexadecimal character in the character's value...
367	 * So you could end up with something like _x0008_ in a string (either in a cell value (<v>)
368	 * element or in the shared string <t> element.
369	 *
370	 * @param 	string	$value	Value to escape
371	 * @return 	string
372	 */
373	public static function ControlCharacterPHP2OOXML($value = '') {
374		return str_replace( array_values(self::$_controlCharacters), array_keys(self::$_controlCharacters), $value );
375	}
376
377	/**
378	 * Try to sanitize UTF8, stripping invalid byte sequences. Not perfect. Does not surrogate characters.
379	 *
380	 * @param string $value
381	 * @return string
382	 */
383	public static function SanitizeUTF8($value)
384	{
385		if (self::getIsIconvEnabled()) {
386			$value = @iconv('UTF-8', 'UTF-8', $value);
387			return $value;
388		}
389
390		if (self::getIsMbstringEnabled()) {
391			$value = mb_convert_encoding($value, 'UTF-8', 'UTF-8');
392			return $value;
393		}
394
395		// else, no conversion
396		return $value;
397	}
398
399	/**
400	 * Check if a string contains UTF8 data
401	 *
402	 * @param string $value
403	 * @return boolean
404	 */
405	public static function IsUTF8($value = '') {
406		return utf8_encode(utf8_decode($value)) === $value;
407	}
408
409	/**
410	 * Formats a numeric value as a string for output in various output writers forcing
411	 * point as decimal separator in case locale is other than English.
412	 *
413	 * @param mixed $value
414	 * @return string
415	 */
416	public static function FormatNumber($value) {
417		if (is_float($value)) {
418			return str_replace(',', '.', $value);
419		}
420		return (string) $value;
421	}
422
423	/**
424	 * Converts a UTF-8 string into BIFF8 Unicode string data (8-bit string length)
425	 * Writes the string using uncompressed notation, no rich text, no Asian phonetics
426	 * If mbstring extension is not available, ASCII is assumed, and compressed notation is used
427	 * although this will give wrong results for non-ASCII strings
428	 * see OpenOffice.org's Documentation of the Microsoft Excel File Format, sect. 2.5.3
429	 *
430	 * @param string $value UTF-8 encoded string
431	 * @return string
432	 */
433	public static function UTF8toBIFF8UnicodeShort($value, $arrcRuns = array())
434	{
435		// character count
436		$ln = self::CountCharacters($value, 'UTF-8');
437
438		// option flags
439		if(empty($arrcRuns)){
440			$opt = (self::getIsIconvEnabled() || self::getIsMbstringEnabled()) ?
441				0x0001 : 0x0000;
442			$data = pack('CC', $ln, $opt);
443			// characters
444			$data .= self::ConvertEncoding($value, 'UTF-16LE', 'UTF-8');
445		}
446		else {
447			$data = pack('vC', $ln, 0x08);
448			$data .= pack('v', count($arrcRuns));
449			// characters
450			$data .= $value;
451			foreach ($arrcRuns as $cRun){
452				$data .= pack('v', $cRun['strlen']);
453				$data .= pack('v', $cRun['fontidx']);
454			}
455		}
456		return $data;
457	}
458
459	/**
460	 * Converts a UTF-8 string into BIFF8 Unicode string data (16-bit string length)
461	 * Writes the string using uncompressed notation, no rich text, no Asian phonetics
462	 * If mbstring extension is not available, ASCII is assumed, and compressed notation is used
463	 * although this will give wrong results for non-ASCII strings
464	 * see OpenOffice.org's Documentation of the Microsoft Excel File Format, sect. 2.5.3
465	 *
466	 * @param string $value UTF-8 encoded string
467	 * @return string
468	 */
469	public static function UTF8toBIFF8UnicodeLong($value)
470	{
471		// character count
472		$ln = self::CountCharacters($value, 'UTF-8');
473
474		// option flags
475		$opt = (self::getIsIconvEnabled() || self::getIsMbstringEnabled()) ?
476			0x0001 : 0x0000;
477
478		// characters
479		$chars = self::ConvertEncoding($value, 'UTF-16LE', 'UTF-8');
480
481		$data = pack('vC', $ln, $opt) . $chars;
482		return $data;
483	}
484
485	/**
486	 * Convert string from one encoding to another. First try iconv, then mbstring, or no convertion
487	 *
488	 * @param string $value
489	 * @param string $to Encoding to convert to, e.g. 'UTF-8'
490	 * @param string $from Encoding to convert from, e.g. 'UTF-16LE'
491	 * @return string
492	 */
493	public static function ConvertEncoding($value, $to, $from)
494	{
495		if (self::getIsIconvEnabled()) {
496			$value = iconv($from, $to, $value);
497			return $value;
498		}
499
500		if (self::getIsMbstringEnabled()) {
501			$value = mb_convert_encoding($value, $to, $from);
502			return $value;
503		}
504		if($from == 'UTF-16LE'){
505			return self::utf16_decode($value, false);
506		}else if($from == 'UTF-16BE'){
507			return self::utf16_decode($value);
508		}
509		// else, no conversion
510		return $value;
511	}
512
513	/**
514	 * Decode UTF-16 encoded strings.
515	 *
516	 * Can handle both BOM'ed data and un-BOM'ed data.
517	 * Assumes Big-Endian byte order if no BOM is available.
518	 * This function was taken from http://php.net/manual/en/function.utf8-decode.php
519	 * and $bom_be parameter added.
520	 *
521	 * @param   string  $str  UTF-16 encoded data to decode.
522	 * @return  string  UTF-8 / ISO encoded data.
523	 * @access  public
524	 * @version 0.2 / 2010-05-13
525	 * @author  Rasmus Andersson {@link http://rasmusandersson.se/}
526	 * @author vadik56
527	 */
528	public static function utf16_decode( $str, $bom_be=true ) {
529		if( strlen($str) < 2 ) return $str;
530		$c0 = ord($str{0});
531		$c1 = ord($str{1});
532		if( $c0 == 0xfe && $c1 == 0xff ) { $str = substr($str,2); }
533		elseif( $c0 == 0xff && $c1 == 0xfe ) { $str = substr($str,2); $bom_be = false; }
534		$len = strlen($str);
535		$newstr = '';
536		for($i=0;$i<$len;$i+=2) {
537			if( $bom_be ) { $val = ord($str{$i})   << 4; $val += ord($str{$i+1}); }
538			else {        $val = ord($str{$i+1}) << 4; $val += ord($str{$i}); }
539			$newstr .= ($val == 0x228) ? "\n" : chr($val);
540		}
541		return $newstr;
542	}
543
544	/**
545	 * Get character count. First try mbstring, then iconv, finally strlen
546	 *
547	 * @param string $value
548	 * @param string $enc Encoding
549	 * @return int Character count
550	 */
551	public static function CountCharacters($value, $enc = 'UTF-8')
552	{
553		if (self::getIsIconvEnabled()) {
554			return iconv_strlen($value, $enc);
555		}
556
557		if (self::getIsMbstringEnabled()) {
558			return mb_strlen($value, $enc);
559		}
560
561		// else strlen
562		return strlen($value);
563	}
564
565	/**
566	 * Get a substring of a UTF-8 encoded string
567	 *
568	 * @param string $pValue UTF-8 encoded string
569	 * @param int $start Start offset
570	 * @param int $length Maximum number of characters in substring
571	 * @return string
572	 */
573	public static function Substring($pValue = '', $pStart = 0, $pLength = 0)
574	{
575		if (self::getIsIconvEnabled()) {
576			return iconv_substr($pValue, $pStart, $pLength, 'UTF-8');
577		}
578
579		if (self::getIsMbstringEnabled()) {
580			return mb_substr($pValue, $pStart, $pLength, 'UTF-8');
581		}
582
583		// else substr
584		return substr($pValue, $pStart, $pLength);
585	}
586
587
588	/**
589	 * Identify whether a string contains a fractional numeric value,
590	 *    and convert it to a numeric if it is
591	 *
592	 * @param string &$operand string value to test
593	 * @return boolean
594	 */
595	public static function convertToNumberIfFraction(&$operand) {
596		if (preg_match('/^'.self::STRING_REGEXP_FRACTION.'$/i', $operand, $match)) {
597			$sign = ($match[1] == '-') ? '-' : '+';
598			$fractionFormula = '='.$sign.$match[2].$sign.$match[3];
599			$operand = PHPExcel_Calculation::getInstance()->_calculateFormulaValue($fractionFormula);
600			return true;
601		}
602		return false;
603	}	//	function convertToNumberIfFraction()
604
605	/**
606	 * Get the decimal separator. If it has not yet been set explicitly, try to obtain number
607	 * formatting information from locale.
608	 *
609	 * @return string
610	 */
611	public static function getDecimalSeparator()
612	{
613		if (!isset(self::$_decimalSeparator)) {
614			$localeconv = localeconv();
615			self::$_decimalSeparator = ($localeconv['decimal_point'] != '')
616				? $localeconv['decimal_point'] : $localeconv['mon_decimal_point'];
617
618			if (self::$_decimalSeparator == '') {
619				// Default to .
620				self::$_decimalSeparator = '.';
621			}
622		}
623		return self::$_decimalSeparator;
624	}
625
626	/**
627	 * Set the decimal separator. Only used by PHPExcel_Style_NumberFormat::toFormattedString()
628	 * to format output by PHPExcel_Writer_HTML and PHPExcel_Writer_PDF
629	 *
630	 * @param string $pValue Character for decimal separator
631	 */
632	public static function setDecimalSeparator($pValue = '.')
633	{
634		self::$_decimalSeparator = $pValue;
635	}
636
637	/**
638	 * Get the thousands separator. If it has not yet been set explicitly, try to obtain number
639	 * formatting information from locale.
640	 *
641	 * @return string
642	 */
643	public static function getThousandsSeparator()
644	{
645		if (!isset(self::$_thousandsSeparator)) {
646			$localeconv = localeconv();
647			self::$_thousandsSeparator = ($localeconv['thousands_sep'] != '')
648				? $localeconv['thousands_sep'] : $localeconv['mon_thousands_sep'];
649		}
650		return self::$_thousandsSeparator;
651	}
652
653	/**
654	 * Set the thousands separator. Only used by PHPExcel_Style_NumberFormat::toFormattedString()
655	 * to format output by PHPExcel_Writer_HTML and PHPExcel_Writer_PDF
656	 *
657	 * @param string $pValue Character for thousands separator
658	 */
659	public static function setThousandsSeparator($pValue = ',')
660	{
661		self::$_thousandsSeparator = $pValue;
662	}
663
664	/**
665	 *	Get the currency code. If it has not yet been set explicitly, try to obtain the
666	 *		symbol information from locale.
667	 *
668	 * @return string
669	 */
670	public static function getCurrencyCode()
671	{
672		if (!isset(self::$_currencyCode)) {
673			$localeconv = localeconv();
674			self::$_currencyCode = ($localeconv['currency_symbol'] != '')
675				? $localeconv['currency_symbol'] : $localeconv['int_curr_symbol'];
676
677			if (self::$_currencyCode == '') {
678				// Default to $
679				self::$_currencyCode = '$';
680			}
681		}
682		return self::$_currencyCode;
683	}
684
685	/**
686	 * Set the currency code. Only used by PHPExcel_Style_NumberFormat::toFormattedString()
687	 *		to format output by PHPExcel_Writer_HTML and PHPExcel_Writer_PDF
688	 *
689	 * @param string $pValue Character for currency code
690	 */
691	public static function setCurrencyCode($pValue = '$')
692	{
693		self::$_currencyCode = $pValue;
694	}
695
696	/**
697	 * Convert SYLK encoded string to UTF-8
698	 *
699	 * @param string $pValue
700	 * @return string UTF-8 encoded string
701	 */
702	public static function SYLKtoUTF8($pValue = '')
703	{
704		// If there is no escape character in the string there is nothing to do
705		if (strpos($pValue, '') === false) {
706			return $pValue;
707		}
708
709		foreach (self::$_SYLKCharacters as $k => $v) {
710			$pValue = str_replace($k, $v, $pValue);
711		}
712
713		return $pValue;
714	}
715
716	/**
717	 * Retrieve any leading numeric part of a string, or return the full string if no leading numeric
718	 *	(handles basic integer or float, but not exponent or non decimal)
719	 *
720	 * @param	string	$value
721	 * @return	mixed	string or only the leading numeric part of the string
722	 */
723	public static function testStringAsNumeric($value)
724	{
725		if (is_numeric($value))
726			return $value;
727		$v = floatval($value);
728		return (is_numeric(substr($value,0,strlen($v)))) ? $v : $value;
729	}
730}