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1 | <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
2 | /** | |
3 | * CodeIgniter | |
4 | * | |
5 | * An open source application development framework for PHP 5.1.6 or newer | |
6 | * | |
7 | * @package CodeIgniter | |
8 | * @author ExpressionEngine Dev Team | |
9 | * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. | |
10 | * @license http://codeigniter.com/user_guide/license.html | |
11 | * @link http://codeigniter.com | |
12 | * @since Version 1.0 | |
13 | * @filesource | |
14 | */ | |
15 | ||
16 | // ------------------------------------------------------------------------ | |
17 | ||
18 | /** | |
19 | * CodeIgniter String Helpers | |
20 | * | |
21 | * @package CodeIgniter | |
22 | * @subpackage Helpers | |
23 | * @category Helpers | |
24 | * @author ExpressionEngine Dev Team | |
25 | * @link http://codeigniter.com/user_guide/helpers/string_helper.html | |
26 | */ | |
27 | ||
28 | // ------------------------------------------------------------------------ | |
29 | ||
30 | /** | |
31 | * Trim Slashes | |
32 | * | |
33 | * Removes any leading/trailing slashes from a string: | |
34 | * | |
35 | * /this/that/theother/ | |
36 | * | |
37 | * becomes: | |
38 | * | |
39 | * this/that/theother | |
40 | * | |
41 | * @access public | |
42 | * @param string | |
43 | * @return string | |
44 | */ | |
45 | if ( ! function_exists('trim_slashes')) | |
46 | { | |
47 | function trim_slashes($str) | |
48 | { | |
49 | return trim($str, '/'); | |
50 | } | |
51 | } | |
52 | ||
53 | // ------------------------------------------------------------------------ | |
54 | ||
55 | /** | |
56 | * Strip Slashes | |
57 | * | |
58 | * Removes slashes contained in a string or in an array | |
59 | * | |
60 | * @access public | |
61 | * @param mixed string or array | |
62 | * @return mixed string or array | |
63 | */ | |
64 | if ( ! function_exists('strip_slashes')) | |
65 | { | |
66 | function strip_slashes($str) | |
67 | { | |
68 | if (is_array($str)) | |
69 | { | |
70 | foreach ($str as $key => $val) | |
71 | { | |
72 | $str[$key] = strip_slashes($val); | |
73 | } | |
74 | } | |
75 | else | |
76 | { | |
77 | $str = stripslashes($str); | |
78 | } | |
79 | ||
80 | return $str; | |
81 | } | |
82 | } | |
83 | ||
84 | // ------------------------------------------------------------------------ | |
85 | ||
86 | /** | |
87 | * Strip Quotes | |
88 | * | |
89 | * Removes single and double quotes from a string | |
90 | * | |
91 | * @access public | |
92 | * @param string | |
93 | * @return string | |
94 | */ | |
95 | if ( ! function_exists('strip_quotes')) | |
96 | { | |
97 | function strip_quotes($str) | |
98 | { | |
99 | return str_replace(array('"', "'"), '', $str); | |
100 | } | |
101 | } | |
102 | ||
103 | // ------------------------------------------------------------------------ | |
104 | ||
105 | /** | |
106 | * Quotes to Entities | |
107 | * | |
108 | * Converts single and double quotes to entities | |
109 | * | |
110 | * @access public | |
111 | * @param string | |
112 | * @return string | |
113 | */ | |
114 | if ( ! function_exists('quotes_to_entities')) | |
115 | { | |
116 | function quotes_to_entities($str) | |
117 | { | |
118 | return str_replace(array("\'","\"","'",'"'), array("'",""","'","""), $str); | |
119 | } | |
120 | } | |
121 | ||
122 | // ------------------------------------------------------------------------ | |
123 | ||
124 | /** | |
125 | * Reduce Double Slashes | |
126 | * | |
127 | * Converts double slashes in a string to a single slash, | |
128 | * except those found in http:// | |
129 | * | |
130 | * http://www.some-site.com//index.php | |
131 | * | |
132 | * becomes: | |
133 | * | |
134 | * http://www.some-site.com/index.php | |
135 | * | |
136 | * @access public | |
137 | * @param string | |
138 | * @return string | |
139 | */ | |
140 | if ( ! function_exists('reduce_double_slashes')) | |
141 | { | |
142 | function reduce_double_slashes($str) | |
143 | { | |
144 | return preg_replace("#(^|[^:])//+#", "\\1/", $str); | |
145 | } | |
146 | } | |
147 | ||
148 | // ------------------------------------------------------------------------ | |
149 | ||
150 | /** | |
151 | * Reduce Multiples | |
152 | * | |
153 | * Reduces multiple instances of a particular character. Example: | |
154 | * | |
155 | * Fred, Bill,, Joe, Jimmy | |
156 | * | |
157 | * becomes: | |
158 | * | |
159 | * Fred, Bill, Joe, Jimmy | |
160 | * | |
161 | * @access public | |
162 | * @param string | |
163 | * @param string the character you wish to reduce | |
164 | * @param bool TRUE/FALSE - whether to trim the character from the beginning/end | |
165 | * @return string | |
166 | */ | |
167 | if ( ! function_exists('reduce_multiples')) | |
168 | { | |
169 | function reduce_multiples($str, $character = ',', $trim = FALSE) | |
170 | { | |
171 | $str = preg_replace('#'.preg_quote($character, '#').'{2,}#', $character, $str); | |
172 | ||
173 | if ($trim === TRUE) | |
174 | { | |
175 | $str = trim($str, $character); | |
176 | } | |
177 | ||
178 | return $str; | |
179 | } | |
180 | } | |
181 | ||
182 | // ------------------------------------------------------------------------ | |
183 | ||
184 | /** | |
185 | * Create a Random String | |
186 | * | |
187 | * Useful for generating passwords or hashes. | |
188 | * | |
189 | * @access public | |
190 | * @param string type of random string. basic, alpha, alunum, numeric, nozero, unique, md5, encrypt and sha1 | |
191 | * @param integer number of characters | |
192 | * @return string | |
193 | */ | |
194 | if ( ! function_exists('random_string')) | |
195 | { | |
196 | function random_string($type = 'alnum', $len = 8) | |
197 | { | |
198 | switch($type) | |
199 | { | |
200 | case 'basic' : return mt_rand(); | |
201 | break; | |
202 | case 'alnum' : | |
203 | case 'numeric' : | |
204 | case 'nozero' : | |
205 | case 'alpha' : | |
206 | ||
207 | switch ($type) | |
208 | { | |
209 | case 'alpha' : $pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; | |
210 | break; | |
211 | case 'alnum' : $pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; | |
212 | break; | |
213 | case 'numeric' : $pool = '0123456789'; | |
214 | break; | |
215 | case 'nozero' : $pool = '123456789'; | |
216 | break; | |
217 | } | |
218 | ||
219 | $str = ''; | |
220 | for ($i=0; $i < $len; $i++) | |
221 | { | |
222 | $str .= substr($pool, mt_rand(0, strlen($pool) -1), 1); | |
223 | } | |
224 | return $str; | |
225 | break; | |
226 | case 'unique' : | |
227 | case 'md5' : | |
228 | ||
229 | return md5(uniqid(mt_rand())); | |
230 | break; | |
231 | case 'encrypt' : | |
232 | case 'sha1' : | |
233 | ||
234 | $CI =& get_instance(); | |
235 | $CI->load->helper('security'); | |
236 | ||
237 | return do_hash(uniqid(mt_rand(), TRUE), 'sha1'); | |
238 | break; | |
239 | } | |
240 | } | |
241 | } | |
242 | ||
243 | // ------------------------------------------------------------------------ | |
244 | ||
245 | /** | |
246 | * Add's _1 to a string or increment the ending number to allow _2, _3, etc | |
247 | * | |
248 | * @param string $str required | |
249 | * @param string $separator What should the duplicate number be appended with | |
250 | * @param string $first Which number should be used for the first dupe increment | |
251 | * @return string | |
252 | */ | |
253 | function increment_string($str, $separator = '_', $first = 1) | |
254 | { | |
255 | preg_match('/(.+)'.$separator.'([0-9]+)$/', $str, $match); | |
256 | ||
257 | return isset($match[2]) ? $match[1].$separator.($match[2] + 1) : $str.$separator.$first; | |
258 | } | |
259 | ||
260 | // ------------------------------------------------------------------------ | |
261 | ||
262 | /** | |
263 | * Alternator | |
264 | * | |
265 | * Allows strings to be alternated. See docs... | |
266 | * | |
267 | * @access public | |
268 | * @param string (as many parameters as needed) | |
269 | * @return string | |
270 | */ | |
271 | if ( ! function_exists('alternator')) | |
272 | { | |
273 | function alternator() | |
274 | { | |
275 | static $i; | |
276 | ||
277 | if (func_num_args() == 0) | |
278 | { | |
279 | $i = 0; | |
280 | return ''; | |
281 | } | |
282 | $args = func_get_args(); | |
283 | return $args[($i++ % count($args))]; | |
284 | } | |
285 | } | |
286 | ||
287 | // ------------------------------------------------------------------------ | |
288 | ||
289 | /** | |
290 | * Repeater function | |
291 | * | |
292 | * @access public | |
293 | * @param string | |
294 | * @param integer number of repeats | |
295 | * @return string | |
296 | */ | |
297 | if ( ! function_exists('repeater')) | |
298 | { | |
299 | function repeater($data, $num = 1) | |
300 | { | |
301 | return (($num > 0) ? str_repeat($data, $num) : ''); | |
302 | } | |
303 | } | |
304 | ||
305 | ||
306 | /* End of file string_helper.php */ | |
307 | /* Location: ./system/helpers/string_helper.php */ |