1: <?php
2:
3: 4: 5: 6: 7: 8: 9: 10: 11:
12:
13:
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15: 16: 17: 18: 19: 20:
21: class NStrings
22: {
23:
24: 25: 26:
27: final public function __construct()
28: {
29: throw new NStaticClassException;
30: }
31:
32:
33:
34: 35: 36: 37: 38: 39:
40: public static function checkEncoding($s, $encoding = 'UTF-8')
41: {
42: return $s === self::fixEncoding($s, $encoding);
43: }
44:
45:
46:
47: 48: 49: 50: 51: 52:
53: public static function fixEncoding($s, $encoding = 'UTF-8')
54: {
55:
56: if (strcasecmp($encoding, 'UTF-8') === 0) {
57: $s = str_replace("\xEF\xBB\xBF", '', $s);
58: }
59: if (PHP_VERSION_ID >= 50400) {
60: ini_set('mbstring.substitute_character', 'none');
61: return mb_convert_encoding($s, $encoding, $encoding);
62: }
63: return @iconv('UTF-16', $encoding . '//IGNORE', iconv($encoding, 'UTF-16//IGNORE', $s));
64: }
65:
66:
67:
68: 69: 70: 71: 72: 73:
74: public static function chr($code, $encoding = 'UTF-8')
75: {
76: return iconv('UTF-32BE', $encoding . '//IGNORE', pack('N', $code));
77: }
78:
79:
80:
81: 82: 83: 84: 85: 86:
87: public static function startsWith($haystack, $needle)
88: {
89: return strncmp($haystack, $needle, strlen($needle)) === 0;
90: }
91:
92:
93:
94: 95: 96: 97: 98: 99:
100: public static function endsWith($haystack, $needle)
101: {
102: return strlen($needle) === 0 || substr($haystack, -strlen($needle)) === $needle;
103: }
104:
105:
106:
107: 108: 109: 110: 111: 112:
113: public static function contains($haystack, $needle)
114: {
115: return strpos($haystack, $needle) !== FALSE;
116: }
117:
118:
119:
120: 121: 122: 123: 124: 125: 126:
127: public static function substring($s, $start, $length = NULL)
128: {
129: if ($length === NULL) {
130: $length = self::length($s);
131: }
132: return function_exists('mb_substr') ? mb_substr($s, $start, $length, 'UTF-8') : iconv_substr($s, $start, $length, 'UTF-8');
133: }
134:
135:
136:
137: 138: 139: 140: 141:
142: public static function normalize($s)
143: {
144:
145: $s = str_replace("\r\n", "\n", $s);
146: $s = strtr($s, "\r", "\n");
147:
148:
149: $s = preg_replace('#[\x00-\x08\x0B-\x1F\x7F]+#', '', $s);
150:
151:
152: $s = preg_replace("#[\t ]+$#m", '', $s);
153:
154:
155: $s = trim($s, "\n");
156:
157: return $s;
158: }
159:
160:
161:
162: 163: 164: 165: 166:
167: public static function toAscii($s)
168: {
169: $s = preg_replace('#[^\x09\x0A\x0D\x20-\x7E\xA0-\x{2FF}\x{370}-\x{10FFFF}]#u', '', $s);
170: $s = strtr($s, '`\'"^~', "\x01\x02\x03\x04\x05");
171: if (ICONV_IMPL === 'glibc') {
172: $s = @iconv('UTF-8', 'WINDOWS-1250//TRANSLIT', $s);
173: $s = strtr($s, "\xa5\xa3\xbc\x8c\xa7\x8a\xaa\x8d\x8f\x8e\xaf\xb9\xb3\xbe\x9c\x9a\xba\x9d\x9f\x9e"
174: . "\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3"
175: . "\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8"
176: . "\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf8\xf9\xfa\xfb\xfc\xfd\xfe",
177: "ALLSSSSTZZZallssstzzzRAAAALCCCEEEEIIDDNNOOOOxRUUUUYTsraaaalccceeeeiiddnnooooruuuuyt");
178: } else {
179: $s = @iconv('UTF-8', 'ASCII//TRANSLIT', $s);
180: }
181: $s = str_replace(array('`', "'", '"', '^', '~'), '', $s);
182: return strtr($s, "\x01\x02\x03\x04\x05", '`\'"^~');
183: }
184:
185:
186:
187: 188: 189: 190: 191: 192: 193:
194: public static function webalize($s, $charlist = NULL, $lower = TRUE)
195: {
196: $s = self::toAscii($s);
197: if ($lower) {
198: $s = strtolower($s);
199: }
200: $s = preg_replace('#[^a-z0-9' . preg_quote($charlist, '#') . ']+#i', '-', $s);
201: $s = trim($s, '-');
202: return $s;
203: }
204:
205:
206:
207: 208: 209: 210: 211: 212: 213:
214: public static function truncate($s, $maxLen, $append = "\xE2\x80\xA6")
215: {
216: if (self::length($s) > $maxLen) {
217: $maxLen = $maxLen - self::length($append);
218: if ($maxLen < 1) {
219: return $append;
220:
221: } elseif ($matches = self::match($s, '#^.{1,'.$maxLen.'}(?=[\s\x00-/:-@\[-`{-~])#us')) {
222: return $matches[0] . $append;
223:
224: } else {
225: return self::substring($s, 0, $maxLen) . $append;
226: }
227: }
228: return $s;
229: }
230:
231:
232:
233: 234: 235: 236: 237: 238: 239:
240: public static function indent($s, $level = 1, $chars = "\t")
241: {
242: return $level < 1 ? $s : self::replace($s, '#(?:^|[\r\n]+)(?=[^\r\n])#', '$0' . str_repeat($chars, $level));
243: }
244:
245:
246:
247: 248: 249: 250: 251:
252: public static function lower($s)
253: {
254: return mb_strtolower($s, 'UTF-8');
255: }
256:
257:
258:
259: 260: 261: 262: 263:
264: public static function upper($s)
265: {
266: return mb_strtoupper($s, 'UTF-8');
267: }
268:
269:
270:
271: 272: 273: 274: 275:
276: public static function firstUpper($s)
277: {
278: return self::upper(self::substring($s, 0, 1)) . self::substring($s, 1);
279: }
280:
281:
282:
283: 284: 285: 286: 287:
288: public static function capitalize($s)
289: {
290: return mb_convert_case($s, MB_CASE_TITLE, 'UTF-8');
291: }
292:
293:
294:
295: 296: 297: 298: 299: 300: 301:
302: public static function compare($left, $right, $len = NULL)
303: {
304: if ($len < 0) {
305: $left = self::substring($left, $len, -$len);
306: $right = self::substring($right, $len, -$len);
307: } elseif ($len !== NULL) {
308: $left = self::substring($left, 0, $len);
309: $right = self::substring($right, 0, $len);
310: }
311: return self::lower($left) === self::lower($right);
312: }
313:
314:
315:
316: 317: 318: 319: 320:
321: public static function length($s)
322: {
323: return strlen(utf8_decode($s));
324: }
325:
326:
327:
328: 329: 330: 331: 332: 333:
334: public static function trim($s, $charlist = " \t\n\r\0\x0B\xC2\xA0")
335: {
336: $charlist = preg_quote($charlist, '#');
337: return self::replace($s, '#^['.$charlist.']+|['.$charlist.']+$#u', '');
338: }
339:
340:
341:
342: 343: 344: 345: 346: 347: 348:
349: public static function padLeft($s, $length, $pad = ' ')
350: {
351: $length = max(0, $length - self::length($s));
352: $padLen = self::length($pad);
353: return str_repeat($pad, $length / $padLen) . self::substring($pad, 0, $length % $padLen) . $s;
354: }
355:
356:
357:
358: 359: 360: 361: 362: 363: 364:
365: public static function padRight($s, $length, $pad = ' ')
366: {
367: $length = max(0, $length - self::length($s));
368: $padLen = self::length($pad);
369: return $s . str_repeat($pad, $length / $padLen) . self::substring($pad, 0, $length % $padLen);
370: }
371:
372:
373:
374: 375: 376: 377: 378:
379: public static function reverse($s)
380: {
381: return @iconv('UTF-32LE', 'UTF-8', strrev(@iconv('UTF-8', 'UTF-32BE', $s)));
382: }
383:
384:
385:
386: 387: 388: 389: 390: 391:
392: public static function random($length = 10, $charlist = '0-9a-z')
393: {
394: $charlist = str_shuffle(preg_replace_callback('#.-.#', create_function('$m', '
395: return implode(\'\', range($m[0][0], $m[0][2]));
396: '), $charlist));
397: $chLen = strlen($charlist);
398:
399: $s = '';
400: for ($i = 0; $i < $length; $i++) {
401: if ($i % 5 === 0) {
402: $rand = lcg_value();
403: $rand2 = microtime(TRUE);
404: }
405: $rand *= $chLen;
406: $s .= $charlist[($rand + $rand2) % $chLen];
407: $rand -= (int) $rand;
408: }
409: return $s;
410: }
411:
412:
413:
414: 415: 416: 417: 418: 419: 420:
421: public static function split($subject, $pattern, $flags = 0)
422: {
423: NDebugger::tryError();
424: $res = preg_split($pattern, $subject, -1, $flags | PREG_SPLIT_DELIM_CAPTURE);
425: if (NDebugger::catchError($e) || preg_last_error()) {
426: throw new NRegexpException($e ? $e->getMessage() : NULL, $e ? NULL : preg_last_error(), $pattern);
427: }
428: return $res;
429: }
430:
431:
432:
433: 434: 435: 436: 437: 438: 439: 440:
441: public static function match($subject, $pattern, $flags = 0, $offset = 0)
442: {
443: if ($offset > strlen($subject)) {
444: return NULL;
445: }
446: NDebugger::tryError();
447: $res = preg_match($pattern, $subject, $m, $flags, $offset);
448: if (NDebugger::catchError($e) || preg_last_error()) {
449: throw new NRegexpException($e ? $e->getMessage() : NULL, $e ? NULL : preg_last_error(), $pattern);
450: }
451: if ($res) {
452: return $m;
453: }
454: }
455:
456:
457:
458: 459: 460: 461: 462: 463: 464: 465:
466: public static function matchAll($subject, $pattern, $flags = 0, $offset = 0)
467: {
468: if ($offset > strlen($subject)) {
469: return array();
470: }
471: NDebugger::tryError();
472: $res = preg_match_all(
473: $pattern, $subject, $m,
474: ($flags & PREG_PATTERN_ORDER) ? $flags : ($flags | PREG_SET_ORDER),
475: $offset
476: );
477: if (NDebugger::catchError($e) || preg_last_error()) {
478: throw new NRegexpException($e ? $e->getMessage() : NULL, $e ? NULL : preg_last_error(), $pattern);
479: }
480: return $m;
481: }
482:
483:
484:
485: 486: 487: 488: 489: 490: 491: 492:
493: public static function replace($subject, $pattern, $replacement = NULL, $limit = -1)
494: {
495: if (is_object($replacement) || is_array($replacement)) {
496: if ($replacement instanceof NCallback) {
497: $replacement = $replacement->getNative();
498: }
499: if (!is_callable($replacement, FALSE, $textual)) {
500: throw new InvalidStateException("Callback '$textual' is not callable.");
501: }
502:
503: foreach ((array) $pattern as $tmp) {
504: NDebugger::tryError();
505: preg_match($tmp, '');
506: if (NDebugger::catchError($e)) {
507: throw new NRegexpException($e->getMessage(), NULL, $tmp);
508: }
509: }
510:
511: $res = preg_replace_callback($pattern, $replacement, $subject, $limit);
512: if ($res === NULL && preg_last_error()) {
513: throw new NRegexpException(NULL, preg_last_error(), $pattern);
514: }
515: return $res;
516:
517: } elseif ($replacement === NULL && is_array($pattern)) {
518: $replacement = array_values($pattern);
519: $pattern = array_keys($pattern);
520: }
521:
522: NDebugger::tryError();
523: $res = preg_replace($pattern, $replacement, $subject, $limit);
524: if (NDebugger::catchError($e) || preg_last_error()) {
525: throw new NRegexpException($e ? $e->getMessage() : NULL, $e ? NULL : preg_last_error(), $pattern);
526: }
527: return $res;
528: }
529:
530: }
531:
532:
533:
534: 535: 536: 537:
538: class NRegexpException extends Exception
539: {
540: static public $messages = array(
541: PREG_INTERNAL_ERROR => 'Internal error',
542: PREG_BACKTRACK_LIMIT_ERROR => 'Backtrack limit was exhausted',
543: PREG_RECURSION_LIMIT_ERROR => 'Recursion limit was exhausted',
544: PREG_BAD_UTF8_ERROR => 'Malformed UTF-8 data',
545: 5 => 'Offset didn\'t correspond to the begin of a valid UTF-8 code point',
546: );
547:
548: public function __construct($message, $code = NULL, $pattern = NULL)
549: {
550: if (!$message) {
551: $message = (isset(self::$messages[$code]) ? self::$messages[$code] : 'Unknown error') . ($pattern ? " (pattern: $pattern)" : '');
552: } elseif ($pattern) {
553: $message .= " in pattern: $pattern";
554: }
555: parent::__construct($message, $code);
556: }
557:
558: }
559: