admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 1 | <?php if (!defined('BASEPATH')) exit('No direct script access allowed'); |
| 2 | /** |
| 3 | * Code Igniter |
| 4 | * |
| 5 | * An open source application development framework for PHP 4.3.2 or newer |
| 6 | * |
| 7 | * @package CodeIgniter |
| 8 | * @author Rick Ellis |
| 9 | * @copyright Copyright (c) 2006, pMachine, Inc. |
admin | e334c47 | 2006-10-21 19:44:22 +0000 | [diff] [blame^] | 10 | * @license http://www.codeignitor.com/user_guide/license.html |
admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 11 | * @link http://www.codeigniter.com |
| 12 | * @since Version 1.0 |
| 13 | * @filesource |
| 14 | */ |
admin | e334c47 | 2006-10-21 19:44:22 +0000 | [diff] [blame^] | 15 | |
admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 16 | // ------------------------------------------------------------------------ |
| 17 | |
| 18 | /** |
| 19 | * Code Igniter String Helpers |
| 20 | * |
| 21 | * @package CodeIgniter |
| 22 | * @subpackage Helpers |
| 23 | * @category Helpers |
| 24 | * @author Rick Ellis |
| 25 | * @link http://www.codeigniter.com/user_guide/helpers/string_helper.html |
| 26 | */ |
| 27 | |
| 28 | // ------------------------------------------------------------------------ |
| 29 | |
| 30 | /** |
| 31 | * Trim Slashes |
| 32 | * |
| 33 | * Removes any leading/traling 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 | function trim_slashes($str) |
| 46 | { |
| 47 | return preg_replace("|^/*(.+?)/*$|", "\\1", $str); |
| 48 | } |
| 49 | |
| 50 | // ------------------------------------------------------------------------ |
| 51 | |
| 52 | /** |
| 53 | * Reduce Double Slashes |
| 54 | * |
| 55 | * Converts double slashes in a string to a single slash, |
| 56 | * except those found in http:// |
| 57 | * |
| 58 | * http://www.some-site.com//index.php |
| 59 | * |
| 60 | * becomes: |
| 61 | * |
| 62 | * http://www.some-site.com/index.php |
| 63 | * |
| 64 | * @access public |
| 65 | * @param string |
| 66 | * @return string |
| 67 | */ |
| 68 | function reduce_double_slashes($str) |
| 69 | { |
admin | e334c47 | 2006-10-21 19:44:22 +0000 | [diff] [blame^] | 70 | return preg_replace("#([^:])//+#", "\\1/", $str); |
admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | // ------------------------------------------------------------------------ |
| 74 | |
| 75 | /** |
| 76 | * Create a Random String |
| 77 | * |
| 78 | * Useful for generating passwords or hashes. |
| 79 | * |
| 80 | * @access public |
| 81 | * @param string type of random string. Options: alunum, numeric, nozero, unique |
| 82 | * @param integer number of characters |
| 83 | * @return string |
| 84 | */ |
| 85 | function random_string($type = 'alnum', $len = 8) |
| 86 | { |
| 87 | switch($type) |
| 88 | { |
| 89 | case 'alnum' : |
| 90 | case 'numeric' : |
| 91 | case 'nozero' : |
| 92 | |
| 93 | switch ($type) |
| 94 | { |
| 95 | case 'alnum' : $pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; |
| 96 | break; |
| 97 | case 'numeric' : $pool = '0123456789'; |
| 98 | break; |
| 99 | case 'nozero' : $pool = '123456789'; |
| 100 | break; |
| 101 | } |
| 102 | |
| 103 | $str = ''; |
admin | e334c47 | 2006-10-21 19:44:22 +0000 | [diff] [blame^] | 104 | for ($i=0; $i < $len; $i++) |
| 105 | { |
| 106 | $str .= substr($pool, mt_rand(0, strlen($pool) -1), 1); |
admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 107 | } |
admin | e334c47 | 2006-10-21 19:44:22 +0000 | [diff] [blame^] | 108 | return $str; |
admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 109 | break; |
admin | e334c47 | 2006-10-21 19:44:22 +0000 | [diff] [blame^] | 110 | case 'unique' : return md5(uniqid(mt_rand())); |
| 111 | break; |
| 112 | } |
admin | b0dd10f | 2006-08-25 17:25:49 +0000 | [diff] [blame] | 113 | } |
| 114 | // ------------------------------------------------------------------------ |
| 115 | |
| 116 | /** |
| 117 | * Alternator |
| 118 | * |
| 119 | * Allows strings to be alternated. See docs... |
| 120 | * |
| 121 | * @access public |
| 122 | * @param string (as many parameters as needed) |
| 123 | * @return string |
| 124 | */ |
| 125 | function alternator() |
| 126 | { |
| 127 | static $i; |
| 128 | |
| 129 | if (func_num_args() == 0) |
| 130 | { |
| 131 | $i = 0; |
| 132 | return ''; |
| 133 | } |
| 134 | $args = func_get_args(); |
| 135 | return $args[($i++ % count($args))]; |
| 136 | } |
| 137 | |
| 138 | // ------------------------------------------------------------------------ |
| 139 | |
| 140 | /** |
| 141 | * Repeater function |
| 142 | * |
| 143 | * @access public |
| 144 | * @param string |
| 145 | * @param integer number of repeats |
| 146 | * @return string |
| 147 | */ |
| 148 | function repeater($data, $num = 1) |
| 149 | { |
| 150 | return str_repeat($data, $num); |
| 151 | } |
| 152 | |
| 153 | |
| 154 | ?> |