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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19 | // $Id: version_compare.php,v 1.13 2005/08/01 12:21:14 aidan Exp $ |
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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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182 | ?> |
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