1: <?php
  2: /**
  3:  * String handling methods.
  4:  *
  5:  * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
  6:  * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
  7:  *
  8:  * Licensed under The MIT License
  9:  * For full copyright and license information, please see the LICENSE.txt
 10:  * Redistributions of files must retain the above copyright notice.
 11:  *
 12:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 13:  * @link          https://cakephp.org CakePHP(tm) Project
 14:  * @package       Cake.Utility
 15:  * @since         CakePHP(tm) v 1.2.0.5551
 16:  * @license       https://opensource.org/licenses/mit-license.php MIT License
 17:  */
 18: 
 19: /**
 20:  * String handling methods.
 21:  *
 22:  * @package       Cake.Utility
 23:  */
 24: class CakeText {
 25: 
 26: /**
 27:  * Generate a random UUID
 28:  *
 29:  * @see http://www.ietf.org/rfc/rfc4122.txt
 30:  * @return string RFC 4122 UUID
 31:  */
 32:     public static function uuid() {
 33:         $random = function_exists('random_int') ? 'random_int' : 'mt_rand';
 34:         return sprintf(
 35:             '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
 36:             // 32 bits for "time_low"
 37:             $random(0, 65535),
 38:             $random(0, 65535),
 39:             // 16 bits for "time_mid"
 40:             $random(0, 65535),
 41:             // 12 bits before the 0100 of (version) 4 for "time_hi_and_version"
 42:             $random(0, 4095) | 0x4000,
 43:             // 16 bits, 8 bits for "clk_seq_hi_res",
 44:             // 8 bits for "clk_seq_low",
 45:             // two most significant bits holds zero and one for variant DCE1.1
 46:             $random(0, 0x3fff) | 0x8000,
 47:             // 48 bits for "node"
 48:             $random(0, 65535),
 49:             $random(0, 65535),
 50:             $random(0, 65535)
 51:         );
 52:     }
 53: 
 54: /**
 55:  * Tokenizes a string using $separator, ignoring any instance of $separator that appears between
 56:  * $leftBound and $rightBound.
 57:  *
 58:  * @param string $data The data to tokenize.
 59:  * @param string $separator The token to split the data on.
 60:  * @param string $leftBound The left boundary to ignore separators in.
 61:  * @param string $rightBound The right boundary to ignore separators in.
 62:  * @return mixed Array of tokens in $data or original input if empty.
 63:  */
 64:     public static function tokenize($data, $separator = ',', $leftBound = '(', $rightBound = ')') {
 65:         if (empty($data)) {
 66:             return array();
 67:         }
 68: 
 69:         $depth = 0;
 70:         $offset = 0;
 71:         $buffer = '';
 72:         $results = array();
 73:         $length = mb_strlen($data);
 74:         $open = false;
 75: 
 76:         while ($offset <= $length) {
 77:             $tmpOffset = -1;
 78:             $offsets = array(
 79:                 mb_strpos($data, $separator, $offset),
 80:                 mb_strpos($data, $leftBound, $offset),
 81:                 mb_strpos($data, $rightBound, $offset)
 82:             );
 83:             for ($i = 0; $i < 3; $i++) {
 84:                 if ($offsets[$i] !== false && ($offsets[$i] < $tmpOffset || $tmpOffset == -1)) {
 85:                     $tmpOffset = $offsets[$i];
 86:                 }
 87:             }
 88:             if ($tmpOffset !== -1) {
 89:                 $buffer .= mb_substr($data, $offset, ($tmpOffset - $offset));
 90:                 $char = mb_substr($data, $tmpOffset, 1);
 91:                 if (!$depth && $char === $separator) {
 92:                     $results[] = $buffer;
 93:                     $buffer = '';
 94:                 } else {
 95:                     $buffer .= $char;
 96:                 }
 97:                 if ($leftBound !== $rightBound) {
 98:                     if ($char === $leftBound) {
 99:                         $depth++;
100:                     }
101:                     if ($char === $rightBound) {
102:                         $depth--;
103:                     }
104:                 } else {
105:                     if ($char === $leftBound) {
106:                         if (!$open) {
107:                             $depth++;
108:                             $open = true;
109:                         } else {
110:                             $depth--;
111:                         }
112:                     }
113:                 }
114:                 $offset = ++$tmpOffset;
115:             } else {
116:                 $results[] = $buffer . mb_substr($data, $offset);
117:                 $offset = $length + 1;
118:             }
119:         }
120:         if (empty($results) && !empty($buffer)) {
121:             $results[] = $buffer;
122:         }
123: 
124:         if (!empty($results)) {
125:             return array_map('trim', $results);
126:         }
127: 
128:         return array();
129:     }
130: 
131: /**
132:  * Replaces variable placeholders inside a $str with any given $data. Each key in the $data array
133:  * corresponds to a variable placeholder name in $str.
134:  * Example: `CakeText::insert(':name is :age years old.', array('name' => 'Bob', '65'));`
135:  * Returns: Bob is 65 years old.
136:  *
137:  * Available $options are:
138:  *
139:  * - before: The character or string in front of the name of the variable placeholder (Defaults to `:`)
140:  * - after: The character or string after the name of the variable placeholder (Defaults to null)
141:  * - escape: The character or string used to escape the before character / string (Defaults to `\`)
142:  * - format: A regex to use for matching variable placeholders. Default is: `/(?<!\\)\:%s/`
143:  *   (Overwrites before, after, breaks escape / clean)
144:  * - clean: A boolean or array with instructions for CakeText::cleanInsert
145:  *
146:  * @param string $str A string containing variable placeholders
147:  * @param array $data A key => val array where each key stands for a placeholder variable name
148:  *     to be replaced with val
149:  * @param array $options An array of options, see description above
150:  * @return string
151:  */
152:     public static function insert($str, $data, $options = array()) {
153:         $defaults = array(
154:             'before' => ':', 'after' => null, 'escape' => '\\', 'format' => null, 'clean' => false
155:         );
156:         $options += $defaults;
157:         $format = $options['format'];
158:         $data = (array)$data;
159:         if (empty($data)) {
160:             return ($options['clean']) ? CakeText::cleanInsert($str, $options) : $str;
161:         }
162: 
163:         if (!isset($format)) {
164:             $format = sprintf(
165:                 '/(?<!%s)%s%%s%s/',
166:                 preg_quote($options['escape'], '/'),
167:                 str_replace('%', '%%', preg_quote($options['before'], '/')),
168:                 str_replace('%', '%%', preg_quote($options['after'], '/'))
169:             );
170:         }
171: 
172:         if (strpos($str, '?') !== false && is_numeric(key($data))) {
173:             $offset = 0;
174:             while (($pos = strpos($str, '?', $offset)) !== false) {
175:                 $val = array_shift($data);
176:                 $offset = $pos + strlen($val);
177:                 $str = substr_replace($str, $val, $pos, 1);
178:             }
179:             return ($options['clean']) ? CakeText::cleanInsert($str, $options) : $str;
180:         }
181: 
182:         asort($data);
183: 
184:         $dataKeys = array_keys($data);
185:         $hashKeys = array_map('crc32', $dataKeys);
186:         $tempData = array_combine($dataKeys, $hashKeys);
187:         krsort($tempData);
188: 
189:         foreach ($tempData as $key => $hashVal) {
190:             $key = sprintf($format, preg_quote($key, '/'));
191:             $str = preg_replace($key, $hashVal, $str);
192:         }
193:         $dataReplacements = array_combine($hashKeys, array_values($data));
194:         foreach ($dataReplacements as $tmpHash => $tmpValue) {
195:             $tmpValue = (is_array($tmpValue)) ? '' : $tmpValue;
196:             $str = str_replace($tmpHash, $tmpValue, $str);
197:         }
198: 
199:         if (!isset($options['format']) && isset($options['before'])) {
200:             $str = str_replace($options['escape'] . $options['before'], $options['before'], $str);
201:         }
202:         return ($options['clean']) ? CakeText::cleanInsert($str, $options) : $str;
203:     }
204: 
205: /**
206:  * Cleans up a CakeText::insert() formatted string with given $options depending on the 'clean' key in
207:  * $options. The default method used is text but html is also available. The goal of this function
208:  * is to replace all whitespace and unneeded markup around placeholders that did not get replaced
209:  * by CakeText::insert().
210:  *
211:  * @param string $str CakeText to clean.
212:  * @param array $options Options list.
213:  * @return string
214:  * @see CakeText::insert()
215:  */
216:     public static function cleanInsert($str, $options) {
217:         $clean = $options['clean'];
218:         if (!$clean) {
219:             return $str;
220:         }
221:         if ($clean === true) {
222:             $clean = array('method' => 'text');
223:         }
224:         if (!is_array($clean)) {
225:             $clean = array('method' => $options['clean']);
226:         }
227:         switch ($clean['method']) {
228:             case 'html':
229:                 $clean = array_merge(array(
230:                     'word' => '[\w,.]+',
231:                     'andText' => true,
232:                     'replacement' => '',
233:                 ), $clean);
234:                 $kleenex = sprintf(
235:                     '/[\s]*[a-z]+=(")(%s%s%s[\s]*)+\\1/i',
236:                     preg_quote($options['before'], '/'),
237:                     $clean['word'],
238:                     preg_quote($options['after'], '/')
239:                 );
240:                 $str = preg_replace($kleenex, $clean['replacement'], $str);
241:                 if ($clean['andText']) {
242:                     $options['clean'] = array('method' => 'text');
243:                     $str = CakeText::cleanInsert($str, $options);
244:                 }
245:                 break;
246:             case 'text':
247:                 $clean = array_merge(array(
248:                     'word' => '[\w,.]+',
249:                     'gap' => '[\s]*(?:(?:and|or)[\s]*)?',
250:                     'replacement' => '',
251:                 ), $clean);
252: 
253:                 $kleenex = sprintf(
254:                     '/(%s%s%s%s|%s%s%s%s)/',
255:                     preg_quote($options['before'], '/'),
256:                     $clean['word'],
257:                     preg_quote($options['after'], '/'),
258:                     $clean['gap'],
259:                     $clean['gap'],
260:                     preg_quote($options['before'], '/'),
261:                     $clean['word'],
262:                     preg_quote($options['after'], '/')
263:                 );
264:                 $str = preg_replace($kleenex, $clean['replacement'], $str);
265:                 break;
266:         }
267:         return $str;
268:     }
269: 
270: /**
271:  * Wraps text to a specific width, can optionally wrap at word breaks.
272:  *
273:  * ### Options
274:  *
275:  * - `width` The width to wrap to. Defaults to 72.
276:  * - `wordWrap` Only wrap on words breaks (spaces) Defaults to true.
277:  * - `indent` CakeText to indent with. Defaults to null.
278:  * - `indentAt` 0 based index to start indenting at. Defaults to 0.
279:  *
280:  * @param string $text The text to format.
281:  * @param array|int $options Array of options to use, or an integer to wrap the text to.
282:  * @return string Formatted text.
283:  */
284:     public static function wrap($text, $options = array()) {
285:         if (is_numeric($options)) {
286:             $options = array('width' => $options);
287:         }
288:         $options += array('width' => 72, 'wordWrap' => true, 'indent' => null, 'indentAt' => 0);
289:         if ($options['wordWrap']) {
290:             $wrapped = static::wordWrap($text, $options['width'], "\n");
291:         } else {
292:             $wrapped = trim(chunk_split($text, $options['width'] - 1, "\n"));
293:         }
294:         if (!empty($options['indent'])) {
295:             $chunks = explode("\n", $wrapped);
296:             for ($i = $options['indentAt'], $len = count($chunks); $i < $len; $i++) {
297:                 $chunks[$i] = $options['indent'] . $chunks[$i];
298:             }
299:             $wrapped = implode("\n", $chunks);
300:         }
301:         return $wrapped;
302:     }
303: 
304: /**
305:  * Unicode aware version of wordwrap.
306:  *
307:  * @param string $text The text to format.
308:  * @param int $width The width to wrap to. Defaults to 72.
309:  * @param string $break The line is broken using the optional break parameter. Defaults to '\n'.
310:  * @param bool $cut If the cut is set to true, the string is always wrapped at the specified width.
311:  * @return string Formatted text.
312:  */
313:     public static function wordWrap($text, $width = 72, $break = "\n", $cut = false) {
314:         $paragraphs = explode($break, $text);
315:         foreach ($paragraphs as &$paragraph) {
316:             $paragraph = static::_wordWrap($paragraph, $width, $break, $cut);
317:         }
318:         return implode($break, $paragraphs);
319:     }
320: 
321: /**
322:  * Helper method for wordWrap().
323:  *
324:  * @param string $text The text to format.
325:  * @param int $width The width to wrap to. Defaults to 72.
326:  * @param string $break The line is broken using the optional break parameter. Defaults to '\n'.
327:  * @param bool $cut If the cut is set to true, the string is always wrapped at the specified width.
328:  * @return string Formatted text.
329:  */
330:     protected static function _wordWrap($text, $width = 72, $break = "\n", $cut = false) {
331:         if ($cut) {
332:             $parts = array();
333:             while (mb_strlen($text) > 0) {
334:                 $part = mb_substr($text, 0, $width);
335:                 $parts[] = trim($part);
336:                 $text = trim(mb_substr($text, mb_strlen($part)));
337:             }
338:             return implode($break, $parts);
339:         }
340: 
341:         $parts = array();
342:         while (mb_strlen($text) > 0) {
343:             if ($width >= mb_strlen($text)) {
344:                 $parts[] = trim($text);
345:                 break;
346:             }
347: 
348:             $part = mb_substr($text, 0, $width);
349:             $nextChar = mb_substr($text, $width, 1);
350:             if ($nextChar !== ' ') {
351:                 $breakAt = mb_strrpos($part, ' ');
352:                 if ($breakAt === false) {
353:                     $breakAt = mb_strpos($text, ' ', $width);
354:                 }
355:                 if ($breakAt === false) {
356:                     $parts[] = trim($text);
357:                     break;
358:                 }
359:                 $part = mb_substr($text, 0, $breakAt);
360:             }
361: 
362:             $part = trim($part);
363:             $parts[] = $part;
364:             $text = trim(mb_substr($text, mb_strlen($part)));
365:         }
366: 
367:         return implode($break, $parts);
368:     }
369: 
370: /**
371:  * Highlights a given phrase in a text. You can specify any expression in highlighter that
372:  * may include the \1 expression to include the $phrase found.
373:  *
374:  * ### Options:
375:  *
376:  * - `format` The piece of html with that the phrase will be highlighted
377:  * - `html` If true, will ignore any HTML tags, ensuring that only the correct text is highlighted
378:  * - `regex` a custom regex rule that is used to match words, default is '|$tag|iu'
379:  *
380:  * @param string $text Text to search the phrase in.
381:  * @param string|array $phrase The phrase or phrases that will be searched.
382:  * @param array $options An array of html attributes and options.
383:  * @return string The highlighted text
384:  * @link https://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::highlight
385:  */
386:     public static function highlight($text, $phrase, $options = array()) {
387:         if (empty($phrase)) {
388:             return $text;
389:         }
390: 
391:         $defaults = array(
392:             'format' => '<span class="highlight">\1</span>',
393:             'html' => false,
394:             'regex' => "|%s|iu"
395:         );
396:         $options += $defaults;
397:         extract($options);
398: 
399:         if (is_array($phrase)) {
400:             $replace = array();
401:             $with = array();
402: 
403:             foreach ($phrase as $key => $segment) {
404:                 $segment = '(' . preg_quote($segment, '|') . ')';
405:                 if ($html) {
406:                     $segment = "(?![^<]+>)$segment(?![^<]+>)";
407:                 }
408: 
409:                 $with[] = (is_array($format)) ? $format[$key] : $format;
410:                 $replace[] = sprintf($options['regex'], $segment);
411:             }
412: 
413:             return preg_replace($replace, $with, $text);
414:         }
415: 
416:         $phrase = '(' . preg_quote($phrase, '|') . ')';
417:         if ($html) {
418:             $phrase = "(?![^<]+>)$phrase(?![^<]+>)";
419:         }
420: 
421:         return preg_replace(sprintf($options['regex'], $phrase), $format, $text);
422:     }
423: 
424: /**
425:  * Strips given text of all links (<a href=....).
426:  *
427:  * @param string $text Text
428:  * @return string The text without links
429:  * @link https://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::stripLinks
430:  */
431:     public static function stripLinks($text) {
432:         return preg_replace('|<a\s+[^>]+>|im', '', preg_replace('|<\/a>|im', '', $text));
433:     }
434: 
435: /**
436:  * Truncates text starting from the end.
437:  *
438:  * Cuts a string to the length of $length and replaces the first characters
439:  * with the ellipsis if the text is longer than length.
440:  *
441:  * ### Options:
442:  *
443:  * - `ellipsis` Will be used as Beginning and prepended to the trimmed string
444:  * - `exact` If false, $text will not be cut mid-word
445:  *
446:  * @param string $text CakeText to truncate.
447:  * @param int $length Length of returned string, including ellipsis.
448:  * @param array $options An array of options.
449:  * @return string Trimmed string.
450:  */
451:     public static function tail($text, $length = 100, $options = array()) {
452:         $defaults = array(
453:             'ellipsis' => '...', 'exact' => true
454:         );
455:         $options += $defaults;
456:         extract($options);
457: 
458:         if (!function_exists('mb_strlen')) {
459:             class_exists('Multibyte');
460:         }
461: 
462:         if (mb_strlen($text) <= $length) {
463:             return $text;
464:         }
465: 
466:         $truncate = mb_substr($text, mb_strlen($text) - $length + mb_strlen($ellipsis));
467:         if (!$exact) {
468:             $spacepos = mb_strpos($truncate, ' ');
469:             $truncate = $spacepos === false ? '' : trim(mb_substr($truncate, $spacepos));
470:         }
471: 
472:         return $ellipsis . $truncate;
473:     }
474: 
475: /**
476:  * Truncates text.
477:  *
478:  * Cuts a string to the length of $length and replaces the last characters
479:  * with the ellipsis if the text is longer than length.
480:  *
481:  * ### Options:
482:  *
483:  * - `ellipsis` Will be used as Ending and appended to the trimmed string (`ending` is deprecated)
484:  * - `exact` If false, $text will not be cut mid-word
485:  * - `html` If true, HTML tags would be handled correctly
486:  *
487:  * @param string $text CakeText to truncate.
488:  * @param int $length Length of returned string, including ellipsis.
489:  * @param array $options An array of html attributes and options.
490:  * @return string Trimmed string.
491:  * @link https://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::truncate
492:  */
493:     public static function truncate($text, $length = 100, $options = array()) {
494:         $defaults = array(
495:             'ellipsis' => '...', 'exact' => true, 'html' => false
496:         );
497:         if (isset($options['ending'])) {
498:             $defaults['ellipsis'] = $options['ending'];
499:         } elseif (!empty($options['html']) && Configure::read('App.encoding') === 'UTF-8') {
500:             $defaults['ellipsis'] = "\xe2\x80\xa6";
501:         }
502:         $options += $defaults;
503:         extract($options);
504: 
505:         if (!function_exists('mb_strlen')) {
506:             class_exists('Multibyte');
507:         }
508: 
509:         if ($html) {
510:             if (mb_strlen(preg_replace('/<.*?>/', '', $text)) <= $length) {
511:                 return $text;
512:             }
513:             $totalLength = mb_strlen(strip_tags($ellipsis));
514:             $openTags = array();
515:             $truncate = '';
516: 
517:             preg_match_all('/(<\/?([\w+]+)[^>]*>)?([^<>]*)/', $text, $tags, PREG_SET_ORDER);
518:             foreach ($tags as $tag) {
519:                 if (!preg_match('/img|br|input|hr|area|base|basefont|col|frame|isindex|link|meta|param/s', $tag[2])) {
520:                     if (preg_match('/<[\w]+[^>]*>/s', $tag[0])) {
521:                         array_unshift($openTags, $tag[2]);
522:                     } elseif (preg_match('/<\/([\w]+)[^>]*>/s', $tag[0], $closeTag)) {
523:                         $pos = array_search($closeTag[1], $openTags);
524:                         if ($pos !== false) {
525:                             array_splice($openTags, $pos, 1);
526:                         }
527:                     }
528:                 }
529:                 $truncate .= $tag[1];
530: 
531:                 $contentLength = mb_strlen(preg_replace('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|&#x[0-9a-f]{1,6};/i', ' ', $tag[3]));
532:                 if ($contentLength + $totalLength > $length) {
533:                     $left = $length - $totalLength;
534:                     $entitiesLength = 0;
535:                     if (preg_match_all('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|&#x[0-9a-f]{1,6};/i', $tag[3], $entities, PREG_OFFSET_CAPTURE)) {
536:                         foreach ($entities[0] as $entity) {
537:                             if ($entity[1] + 1 - $entitiesLength <= $left) {
538:                                 $left--;
539:                                 $entitiesLength += mb_strlen($entity[0]);
540:                             } else {
541:                                 break;
542:                             }
543:                         }
544:                     }
545: 
546:                     $truncate .= mb_substr($tag[3], 0, $left + $entitiesLength);
547:                     break;
548:                 } else {
549:                     $truncate .= $tag[3];
550:                     $totalLength += $contentLength;
551:                 }
552:                 if ($totalLength >= $length) {
553:                     break;
554:                 }
555:             }
556:         } else {
557:             if (mb_strlen($text) <= $length) {
558:                 return $text;
559:             }
560:             $truncate = mb_substr($text, 0, $length - mb_strlen($ellipsis));
561:         }
562:         if (!$exact) {
563:             $spacepos = mb_strrpos($truncate, ' ');
564:             if ($html) {
565:                 $truncateCheck = mb_substr($truncate, 0, $spacepos);
566:                 $lastOpenTag = mb_strrpos($truncateCheck, '<');
567:                 $lastCloseTag = mb_strrpos($truncateCheck, '>');
568:                 if ($lastOpenTag > $lastCloseTag) {
569:                     preg_match_all('/<[\w]+[^>]*>/s', $truncate, $lastTagMatches);
570:                     $lastTag = array_pop($lastTagMatches[0]);
571:                     $spacepos = mb_strrpos($truncate, $lastTag) + mb_strlen($lastTag);
572:                 }
573:                 $bits = mb_substr($truncate, $spacepos);
574:                 preg_match_all('/<\/([a-z]+)>/', $bits, $droppedTags, PREG_SET_ORDER);
575:                 if (!empty($droppedTags)) {
576:                     if (!empty($openTags)) {
577:                         foreach ($droppedTags as $closingTag) {
578:                             if (!in_array($closingTag[1], $openTags)) {
579:                                 array_unshift($openTags, $closingTag[1]);
580:                             }
581:                         }
582:                     } else {
583:                         foreach ($droppedTags as $closingTag) {
584:                             $openTags[] = $closingTag[1];
585:                         }
586:                     }
587:                 }
588:             }
589:             $truncate = mb_substr($truncate, 0, $spacepos);
590:         }
591:         $truncate .= $ellipsis;
592: 
593:         if ($html) {
594:             foreach ($openTags as $tag) {
595:                 $truncate .= '</' . $tag . '>';
596:             }
597:         }
598: 
599:         return $truncate;
600:     }
601: 
602: /**
603:  * Extracts an excerpt from the text surrounding the phrase with a number of characters on each side
604:  * determined by radius.
605:  *
606:  * @param string $text CakeText to search the phrase in
607:  * @param string $phrase Phrase that will be searched for
608:  * @param int $radius The amount of characters that will be returned on each side of the founded phrase
609:  * @param string $ellipsis Ending that will be appended
610:  * @return string Modified string
611:  * @link https://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::excerpt
612:  */
613:     public static function excerpt($text, $phrase, $radius = 100, $ellipsis = '...') {
614:         if (empty($text) || empty($phrase)) {
615:             return static::truncate($text, $radius * 2, array('ellipsis' => $ellipsis));
616:         }
617: 
618:         $append = $prepend = $ellipsis;
619: 
620:         $phraseLen = mb_strlen($phrase);
621:         $textLen = mb_strlen($text);
622: 
623:         $pos = mb_strpos(mb_strtolower($text), mb_strtolower($phrase));
624:         if ($pos === false) {
625:             return mb_substr($text, 0, $radius) . $ellipsis;
626:         }
627: 
628:         $startPos = $pos - $radius;
629:         if ($startPos <= 0) {
630:             $startPos = 0;
631:             $prepend = '';
632:         }
633: 
634:         $endPos = $pos + $phraseLen + $radius;
635:         if ($endPos >= $textLen) {
636:             $endPos = $textLen;
637:             $append = '';
638:         }
639: 
640:         $excerpt = mb_substr($text, $startPos, $endPos - $startPos);
641:         $excerpt = $prepend . $excerpt . $append;
642: 
643:         return $excerpt;
644:     }
645: 
646: /**
647:  * Creates a comma separated list where the last two items are joined with 'and', forming natural language.
648:  *
649:  * @param array $list The list to be joined.
650:  * @param string $and The word used to join the last and second last items together with. Defaults to 'and'.
651:  * @param string $separator The separator used to join all the other items together. Defaults to ', '.
652:  * @return string The glued together string.
653:  * @link https://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::toList
654:  */
655:     public static function toList($list, $and = null, $separator = ', ') {
656:         if ($and === null) {
657:             $and = __d('cake', 'and');
658:         }
659:         if (count($list) > 1) {
660:             return implode($separator, array_slice($list, null, -1)) . ' ' . $and . ' ' . array_pop($list);
661:         }
662: 
663:         return array_pop($list);
664:     }
665: }
666: