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trim.php
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1 <?php
2 /**
3 * @version $Id$
4 * @package utf8
5 * @subpackage strings
6 */
7 
8 //---------------------------------------------------------------
9 /**
10 * UTF-8 aware replacement for ltrim()
11 * Note: you only need to use this if you are supplying the charlist
12 * optional arg and it contains UTF-8 characters. Otherwise ltrim will
13 * work normally on a UTF-8 string
14 * @author Andreas Gohr <andi@splitbrain.org>
15 * @see http://www.php.net/ltrim
16 * @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
17 * @return string
18 * @package utf8
19 * @subpackage strings
20 */
21 function utf8_ltrim( $str, $charlist = FALSE ) {
22  if($charlist === FALSE) return ltrim($str);
23 
24  //quote charlist for use in a characterclass
25  $charlist = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$charlist);
26 
27  return preg_replace('/^['.$charlist.']+/u','',$str);
28 }
29 
30 //---------------------------------------------------------------
31 /**
32 * UTF-8 aware replacement for rtrim()
33 * Note: you only need to use this if you are supplying the charlist
34 * optional arg and it contains UTF-8 characters. Otherwise rtrim will
35 * work normally on a UTF-8 string
36 * @author Andreas Gohr <andi@splitbrain.org>
37 * @see http://www.php.net/rtrim
38 * @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
39 * @return string
40 * @package utf8
41 * @subpackage strings
42 */
43 function utf8_rtrim( $str, $charlist = FALSE ) {
44  if($charlist === FALSE) return rtrim($str);
45 
46  //quote charlist for use in a characterclass
47  $charlist = preg_replace('!([\\\\\\-\\]\\[/^])!','\\\${1}',$charlist);
48 
49  return preg_replace('/['.$charlist.']+$/u','',$str);
50 }
51 
52 //---------------------------------------------------------------
53 /**
54 * UTF-8 aware replacement for trim()
55 * Note: you only need to use this if you are supplying the charlist
56 * optional arg and it contains UTF-8 characters. Otherwise trim will
57 * work normally on a UTF-8 string
58 * @author Andreas Gohr <andi@splitbrain.org>
59 * @see http://www.php.net/trim
60 * @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
61 * @return string
62 * @package utf8
63 * @subpackage strings
64 */
65 function utf8_trim( $str, $charlist = FALSE ) {
66  if($charlist === FALSE) return trim($str);
67  return utf8_ltrim(utf8_rtrim($str, $charlist), $charlist);
68 }