[20116] | 1 | <?php |
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| 2 | // +----------------------------------------------------------------------+ |
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| 3 | // | PHP Version 4 | |
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| 4 | // +----------------------------------------------------------------------+ |
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| 5 | // | Copyright (c) 1997-2004 The PHP Group | |
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| 6 | // +----------------------------------------------------------------------+ |
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| 7 | // | This source file is subject to version 3.0 of the PHP license, | |
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| 8 | // | that is bundled with this package in the file LICENSE, and is | |
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| 9 | // | available at through the world-wide-web at | |
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| 10 | // | http://www.php.net/license/3_0.txt. | |
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| 11 | // | If you did not receive a copy of the PHP license and are unable to | |
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| 12 | // | obtain it through the world-wide-web, please send a note to | |
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| 13 | // | license@php.net so we can mail you a copy immediately. | |
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| 14 | // +----------------------------------------------------------------------+ |
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| 15 | // | Authors: Philippe Jausions <Philippe.Jausions@11abacus.com> | |
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| 16 | // | Aidan Lister <aidan@php.net> | |
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| 17 | // +----------------------------------------------------------------------+ |
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| 18 | // |
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[20119] | 19 | // $Id: version_compare.php,v 1.13 2005/08/01 12:21:14 aidan Exp $ |
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[20116] | 20 | |
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| 21 | |
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| 22 | /** |
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| 23 | * Replace version_compare() |
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| 24 | * |
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| 25 | * @category PHP |
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| 26 | * @package PHP_Compat |
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| 27 | * @link http://php.net/function.version_compare |
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| 28 | * @author Philippe Jausions <Philippe.Jausions@11abacus.com> |
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| 29 | * @author Aidan Lister <aidan@php.net> |
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| 30 | * @version $Revision: 1.13 $ |
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| 31 | * @since PHP 4.1.0 |
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| 32 | * @require PHP 4.0.5 (user_error) |
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| 33 | */ |
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| 34 | if (!function_exists('version_compare')) { |
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| 35 | function version_compare($version1, $version2, $operator = '<') |
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| 36 | { |
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| 37 | // Check input |
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| 38 | if (!is_scalar($version1)) { |
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| 39 | user_error('version_compare() expects parameter 1 to be string, ' . |
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| 40 | gettype($version1) . ' given', E_USER_WARNING); |
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| 41 | return; |
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| 42 | } |
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| 43 | |
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| 44 | if (!is_scalar($version2)) { |
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| 45 | user_error('version_compare() expects parameter 2 to be string, ' . |
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| 46 | gettype($version2) . ' given', E_USER_WARNING); |
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| 47 | return; |
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| 48 | } |
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| 49 | |
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| 50 | if (!is_scalar($operator)) { |
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| 51 | user_error('version_compare() expects parameter 3 to be string, ' . |
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| 52 | gettype($operator) . ' given', E_USER_WARNING); |
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| 53 | return; |
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| 54 | } |
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| 55 | |
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| 56 | // Standardise versions |
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| 57 | $v1 = explode('.', |
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| 58 | str_replace('..', '.', |
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| 59 | preg_replace('/([^0-9\.]+)/', '.$1.', |
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| 60 | str_replace(array('-', '_', '+'), '.', |
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| 61 | trim($version1))))); |
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| 62 | |
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| 63 | $v2 = explode('.', |
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| 64 | str_replace('..', '.', |
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| 65 | preg_replace('/([^0-9\.]+)/', '.$1.', |
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| 66 | str_replace(array('-', '_', '+'), '.', |
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| 67 | trim($version2))))); |
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| 68 | |
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| 69 | // Replace empty entries at the start of the array |
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| 70 | while (empty($v1[0]) && array_shift($v1)) {} |
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| 71 | while (empty($v2[0]) && array_shift($v2)) {} |
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| 72 | |
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| 73 | // Release state order |
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| 74 | // '#' stands for any number |
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| 75 | $versions = array( |
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| 76 | 'dev' => 0, |
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| 77 | 'alpha' => 1, |
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| 78 | 'a' => 1, |
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| 79 | 'beta' => 2, |
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| 80 | 'b' => 2, |
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| 81 | 'RC' => 3, |
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| 82 | '#' => 4, |
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| 83 | 'p' => 5, |
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| 84 | 'pl' => 5); |
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| 85 | |
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| 86 | // Loop through each segment in the version string |
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| 87 | $compare = 0; |
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| 88 | for ($i = 0, $x = min(count($v1), count($v2)); $i < $x; $i++) { |
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| 89 | if ($v1[$i] == $v2[$i]) { |
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| 90 | continue; |
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| 91 | } |
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| 92 | $i1 = $v1[$i]; |
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| 93 | $i2 = $v2[$i]; |
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| 94 | if (is_numeric($i1) && is_numeric($i2)) { |
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| 95 | $compare = ($i1 < $i2) ? -1 : 1; |
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| 96 | break; |
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| 97 | } |
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| 98 | |
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| 99 | // We use the position of '#' in the versions list |
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| 100 | // for numbers... (so take care of # in original string) |
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| 101 | if ($i1 == '#') { |
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| 102 | $i1 = ''; |
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| 103 | } elseif (is_numeric($i1)) { |
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| 104 | $i1 = '#'; |
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| 105 | } |
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| 106 | |
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| 107 | if ($i2 == '#') { |
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| 108 | $i2 = ''; |
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| 109 | } elseif (is_numeric($i2)) { |
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| 110 | $i2 = '#'; |
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| 111 | } |
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| 112 | |
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| 113 | if (isset($versions[$i1]) && isset($versions[$i2])) { |
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| 114 | $compare = ($versions[$i1] < $versions[$i2]) ? -1 : 1; |
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| 115 | } elseif (isset($versions[$i1])) { |
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| 116 | $compare = 1; |
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| 117 | } elseif (isset($versions[$i2])) { |
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| 118 | $compare = -1; |
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| 119 | } else { |
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| 120 | $compare = 0; |
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| 121 | } |
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| 122 | |
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| 123 | break; |
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| 124 | } |
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| 125 | |
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| 126 | // If previous loop didn't find anything, compare the "extra" segments |
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| 127 | if ($compare == 0) { |
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| 128 | if (count($v2) > count($v1)) { |
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| 129 | if (isset($versions[$v2[$i]])) { |
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| 130 | $compare = ($versions[$v2[$i]] < 4) ? 1 : -1; |
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| 131 | } else { |
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| 132 | $compare = -1; |
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| 133 | } |
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| 134 | } elseif (count($v2) < count($v1)) { |
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| 135 | if (isset($versions[$v1[$i]])) { |
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| 136 | $compare = ($versions[$v1[$i]] < 4) ? -1 : 1; |
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| 137 | } else { |
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| 138 | $compare = 1; |
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| 139 | } |
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| 140 | } |
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| 141 | } |
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| 142 | |
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| 143 | // Compare the versions |
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| 144 | if (func_num_args() > 2) { |
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| 145 | switch ($operator) { |
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| 146 | case '>': |
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| 147 | case 'gt': |
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| 148 | return (bool) ($compare > 0); |
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| 149 | break; |
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| 150 | case '>=': |
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| 151 | case 'ge': |
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| 152 | return (bool) ($compare >= 0); |
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| 153 | break; |
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| 154 | case '<=': |
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| 155 | case 'le': |
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| 156 | return (bool) ($compare <= 0); |
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| 157 | break; |
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| 158 | case '==': |
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| 159 | case '=': |
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| 160 | case 'eq': |
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| 161 | return (bool) ($compare == 0); |
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| 162 | break; |
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| 163 | case '<>': |
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| 164 | case '!=': |
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| 165 | case 'ne': |
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| 166 | return (bool) ($compare != 0); |
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| 167 | break; |
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| 168 | case '': |
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| 169 | case '<': |
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| 170 | case 'lt': |
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| 171 | return (bool) ($compare < 0); |
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| 172 | break; |
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| 173 | default: |
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| 174 | return; |
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| 175 | } |
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| 176 | } |
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| 177 | |
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| 178 | return $compare; |
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| 179 | } |
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| 180 | } |
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| 181 | |
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[19792] | 182 | ?> |
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