Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like FileHandler often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use FileHandler, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 9 | class FileHandler |
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| 10 | { |
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| 11 | |||
| 12 | /** |
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| 13 | * Changes path of target file, directory into absolute path |
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| 14 | * |
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| 15 | * @param string $source path to change into absolute path |
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| 16 | * @return string Absolute path |
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| 17 | */ |
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| 18 | function getRealPath($source) |
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| 19 | { |
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| 20 | if(strlen($source) >= 2 && substr_compare($source, './', 0, 2) === 0) |
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| 21 | { |
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| 22 | return _XE_PATH_ . substr($source, 2); |
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| 23 | } |
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| 24 | |||
| 25 | return $source; |
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| 26 | } |
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| 27 | |||
| 28 | /** |
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| 29 | * Copy a directory to target |
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| 30 | * |
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| 31 | * If target directory does not exist, this function creates it |
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| 32 | * |
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| 33 | * @param string $source_dir Path of source directory |
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| 34 | * @param string $target_dir Path of target dir |
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| 35 | * @param string $filter Regex to filter files. If file matches this regex, the file is not copied. |
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| 36 | * @param string $type If set as 'force'. Even if the file exists in target, the file is copied. |
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| 37 | * @return void |
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| 38 | */ |
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| 39 | function copyDir($source_dir, $target_dir, $filter = null, $type = null) |
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| 40 | { |
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| 41 | $source_dir = self::getRealPath($source_dir); |
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| 42 | $target_dir = self::getRealPath($target_dir); |
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| 43 | if(!is_dir($source_dir)) |
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| 44 | { |
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| 45 | return FALSE; |
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| 46 | } |
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| 47 | |||
| 48 | // generate when no target exists |
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| 49 | self::makeDir($target_dir); |
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| 50 | |||
| 51 | if(substr($source_dir, -1) != DIRECTORY_SEPARATOR) |
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| 52 | { |
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| 53 | $source_dir .= DIRECTORY_SEPARATOR; |
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| 54 | } |
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| 55 | |||
| 56 | if(substr($target_dir, -1) != DIRECTORY_SEPARATOR) |
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| 57 | { |
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| 58 | $target_dir .= DIRECTORY_SEPARATOR; |
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| 59 | } |
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| 60 | |||
| 61 | $oDir = dir($source_dir); |
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| 62 | while($file = $oDir->read()) |
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| 63 | { |
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| 64 | if($file{0} == '.') |
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| 65 | { |
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| 66 | continue; |
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| 67 | } |
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| 68 | |||
| 69 | if($filter && preg_match($filter, $file)) |
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| 70 | { |
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| 71 | continue; |
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| 72 | } |
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| 73 | |||
| 74 | if(is_dir($source_dir . $file)) |
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| 75 | { |
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| 76 | self::copyDir($source_dir . $file, $target_dir . $file, $type); |
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| 77 | } |
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| 78 | else |
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| 79 | { |
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| 80 | if($type == 'force') |
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| 81 | { |
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| 82 | @unlink($target_dir . $file); |
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| 83 | } |
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| 84 | else |
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| 85 | { |
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| 86 | if(!file_exists($target_dir . $file)) |
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| 87 | { |
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| 88 | @copy($source_dir . $file, $target_dir . $file); |
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| 89 | } |
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| 90 | } |
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| 91 | } |
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| 92 | } |
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| 93 | $oDir->close(); |
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| 94 | } |
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| 95 | |||
| 96 | /** |
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| 97 | * Copy a file to target |
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| 98 | * |
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| 99 | * @param string $source Path of source file |
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| 100 | * @param string $target Path of target file |
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| 101 | * @param string $force Y: overwrite |
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| 102 | * @return void |
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| 103 | */ |
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| 104 | function copyFile($source, $target, $force = 'Y') |
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| 105 | { |
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| 106 | setlocale(LC_CTYPE, 'en_US.UTF8', 'ko_KR.UTF8'); |
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| 107 | $source = self::getRealPath($source); |
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| 108 | $target_dir = self::getRealPath(dirname($target)); |
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| 109 | $target = basename($target); |
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| 110 | |||
| 111 | self::makeDir($target_dir); |
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| 112 | |||
| 113 | if($force == 'Y') |
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| 114 | { |
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| 115 | @unlink($target_dir . DIRECTORY_SEPARATOR . $target); |
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| 116 | } |
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| 117 | |||
| 118 | @copy($source, $target_dir . DIRECTORY_SEPARATOR . $target); |
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| 119 | } |
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| 120 | |||
| 121 | /** |
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| 122 | * Returns the content of the file |
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| 123 | * |
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| 124 | * @param string $filename Path of target file |
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| 125 | * @return string The content of the file. If target file does not exist, this function returns nothing. |
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| 126 | */ |
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| 127 | function readFile($filename) |
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| 128 | { |
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| 129 | if(($filename = self::exists($filename)) === FALSE || filesize($filename) < 1) |
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| 130 | { |
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| 131 | return; |
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| 132 | } |
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| 133 | |||
| 134 | return @file_get_contents($filename); |
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| 135 | } |
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| 136 | |||
| 137 | /** |
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| 138 | * Write $buff into the specified file |
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| 139 | * |
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| 140 | * @param string $filename Path of target file |
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| 141 | * @param string $buff Content to be written |
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| 142 | * @param string $mode a(append) / w(write) |
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| 143 | * @return void |
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| 144 | */ |
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| 145 | function writeFile($filename, $buff, $mode = "w") |
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| 146 | { |
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| 147 | $filename = self::getRealPath($filename); |
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| 148 | $pathinfo = pathinfo($filename); |
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| 149 | self::makeDir($pathinfo['dirname']); |
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| 150 | |||
| 151 | $flags = 0; |
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| 152 | if(strtolower($mode) == 'a') |
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| 153 | { |
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| 154 | $flags = FILE_APPEND; |
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| 155 | } |
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| 156 | |||
| 157 | @file_put_contents($filename, $buff, $flags|LOCK_EX); |
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| 158 | @chmod($filename, 0644); |
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| 159 | } |
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| 160 | |||
| 161 | /** |
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| 162 | * Remove a file |
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| 163 | * |
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| 164 | * @param string $filename path of target file |
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| 165 | * @return bool Returns TRUE on success or FALSE on failure. |
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| 166 | */ |
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| 167 | function removeFile($filename) |
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| 168 | { |
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| 169 | return (($filename = self::exists($filename)) !== FALSE) && @unlink($filename); |
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| 170 | } |
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| 171 | |||
| 172 | /** |
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| 173 | * Rename a file |
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| 174 | * |
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| 175 | * In order to move a file, use this function. |
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| 176 | * |
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| 177 | * @param string $source Path of source file |
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| 178 | * @param string $target Path of target file |
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| 179 | * @return bool Returns TRUE on success or FALSE on failure. |
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| 180 | */ |
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| 181 | function rename($source, $target) |
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| 182 | { |
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| 183 | return @rename(self::getRealPath($source), self::getRealPath($target)); |
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| 184 | } |
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| 185 | |||
| 186 | /** |
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| 187 | * Move a file |
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| 188 | * |
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| 189 | * @param string $source Path of source file |
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| 190 | * @param string $target Path of target file |
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| 191 | * @return bool Returns TRUE on success or FALSE on failure. |
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| 192 | */ |
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| 193 | function moveFile($source, $target) |
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| 194 | { |
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| 195 | if(($source = self::exists($source)) !== FALSE) |
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| 196 | { |
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| 197 | self::removeFile($target); |
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| 198 | return self::rename($source, $target); |
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| 199 | } |
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| 200 | return FALSE; |
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| 201 | } |
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| 202 | |||
| 203 | /** |
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| 204 | * Move a directory |
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| 205 | * |
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| 206 | * This function just wraps rename function. |
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| 207 | * |
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| 208 | * @param string $source_dir Path of source directory |
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| 209 | * @param string $target_dir Path of target directory |
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| 210 | * @return void |
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| 211 | */ |
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| 212 | function moveDir($source_dir, $target_dir) |
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| 213 | { |
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| 214 | self::rename($source_dir, $target_dir); |
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| 215 | } |
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| 216 | |||
| 217 | /** |
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| 218 | * Return list of the files in the path |
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| 219 | * |
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| 220 | * The array does not contain files, such as '.', '..', and files starting with '.' |
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| 221 | * |
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| 222 | * @param string $path Path of target directory |
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| 223 | * @param string $filter If specified, return only files matching with the filter |
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| 224 | * @param bool $to_lower If TRUE, file names will be changed into lower case. |
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| 225 | * @param bool $concat_prefix If TRUE, return file name as absolute path |
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| 226 | * @return string[] Array of the filenames in the path |
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| 227 | */ |
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| 228 | function readDir($path, $filter = '', $to_lower = FALSE, $concat_prefix = FALSE) |
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| 229 | { |
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| 230 | $path = self::getRealPath($path); |
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| 231 | $output = array(); |
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| 232 | |||
| 233 | if(substr($path, -1) != '/') |
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| 234 | { |
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| 235 | $path .= '/'; |
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| 236 | } |
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| 237 | |||
| 238 | if(!is_dir($path)) |
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| 239 | { |
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| 240 | return $output; |
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| 241 | } |
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| 242 | |||
| 243 | $files = scandir($path); |
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| 244 | foreach($files as $file) |
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| 245 | { |
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| 246 | if($file{0} == '.' || ($filter && !preg_match($filter, $file))) |
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| 247 | { |
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| 248 | continue; |
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| 249 | } |
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| 250 | |||
| 251 | if($to_lower) |
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| 252 | { |
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| 253 | $file = strtolower($file); |
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| 254 | } |
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| 255 | |||
| 256 | if($filter) |
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| 257 | { |
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| 258 | $file = preg_replace($filter, '$1', $file); |
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| 259 | } |
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| 260 | |||
| 261 | if($concat_prefix) |
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| 262 | { |
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| 263 | $file = sprintf('%s%s', str_replace(_XE_PATH_, '', $path), $file); |
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| 264 | } |
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| 265 | |||
| 266 | $output[] = str_replace(array('/\\', '//'), '/', $file); |
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| 267 | } |
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| 268 | |||
| 269 | return $output; |
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| 270 | } |
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| 271 | |||
| 272 | /** |
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| 273 | * Creates a directory |
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| 274 | * |
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| 275 | * This function creates directories recursively, which means that if ancestors of the target directory does not exist, they will be created too. |
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| 276 | * |
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| 277 | * @param string $path_string Path of target directory |
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| 278 | * @return bool TRUE if success. It might return nothing when ftp is used and connection to the ftp address failed. |
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| 279 | */ |
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| 280 | function makeDir($path_string) |
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| 281 | { |
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| 282 | if(self::exists($path_string) !== FALSE) |
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| 283 | { |
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| 284 | return TRUE; |
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| 285 | } |
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| 286 | |||
| 287 | if(!ini_get('safe_mode')) |
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| 288 | { |
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| 289 | @mkdir($path_string, 0755, TRUE); |
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| 290 | @chmod($path_string, 0755); |
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| 291 | } |
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| 292 | // if safe_mode is on, use FTP |
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| 293 | else |
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| 294 | { |
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| 295 | static $oFtp = NULL; |
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| 296 | |||
| 297 | $ftp_info = Context::getFTPInfo(); |
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| 298 | if($oFtp == NULL) |
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| 299 | { |
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| 300 | if(!Context::isFTPRegisted()) |
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| 301 | { |
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| 302 | return; |
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| 303 | } |
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| 304 | |||
| 305 | require_once(_XE_PATH_ . 'libs/ftp.class.php'); |
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| 306 | $oFtp = new ftp(); |
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| 307 | if(!$ftp_info->ftp_host) |
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| 308 | { |
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| 309 | $ftp_info->ftp_host = "127.0.0.1"; |
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| 310 | } |
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| 311 | if(!$ftp_info->ftp_port) |
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| 312 | { |
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| 313 | $ftp_info->ftp_port = 21; |
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| 314 | } |
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| 315 | if(!$oFtp->ftp_connect($ftp_info->ftp_host, $ftp_info->ftp_port)) |
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| 316 | { |
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| 317 | return; |
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| 318 | } |
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| 319 | if(!$oFtp->ftp_login($ftp_info->ftp_user, $ftp_info->ftp_password)) |
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| 320 | { |
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| 321 | $oFtp->ftp_quit(); |
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| 322 | return; |
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| 323 | } |
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| 324 | } |
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| 325 | |||
| 326 | if(!($ftp_path = $ftp_info->ftp_root_path)) |
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| 327 | { |
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| 328 | $ftp_path = DIRECTORY_SEPARATOR; |
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| 329 | } |
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| 330 | |||
| 331 | $path_string = str_replace(_XE_PATH_, '', $path_string); |
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| 332 | $path_list = explode(DIRECTORY_SEPARATOR, $path_string); |
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| 333 | |||
| 334 | $path = _XE_PATH_; |
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| 335 | for($i = 0, $c = count($path_list); $i < $c; $i++) |
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| 336 | { |
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| 337 | if(!$path_list[$i]) |
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| 338 | { |
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| 339 | continue; |
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| 340 | } |
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| 341 | |||
| 342 | $path .= $path_list[$i] . DIRECTORY_SEPARATOR; |
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| 343 | $ftp_path .= $path_list[$i] . DIRECTORY_SEPARATOR; |
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| 344 | if(!is_dir($path)) |
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| 345 | { |
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| 346 | $oFtp->ftp_mkdir($ftp_path); |
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| 347 | $oFtp->ftp_site("CHMOD 777 " . $ftp_path); |
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| 348 | } |
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| 349 | } |
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| 350 | } |
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| 351 | |||
| 352 | return is_dir($path_string); |
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| 353 | } |
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| 354 | |||
| 355 | /** |
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| 356 | * Remove all files under the path |
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| 357 | * |
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| 358 | * @param string $path Path of the target directory |
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| 359 | * @return void |
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| 360 | */ |
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| 361 | View Code Duplication | function removeDir($path) |
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| 362 | { |
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| 363 | if(($path = self::isDir($path)) === FALSE) |
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| 364 | { |
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| 365 | return; |
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| 366 | } |
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| 367 | |||
| 368 | if(self::isDir($path)) |
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| 369 | { |
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| 370 | $files = array_diff(scandir($path), array('..', '.')); |
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| 371 | |||
| 372 | foreach($files as $file) |
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| 373 | { |
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| 374 | if(($target = self::getRealPath($path . DIRECTORY_SEPARATOR . $file)) === FALSE) |
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| 375 | { |
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| 376 | continue; |
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| 377 | } |
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| 378 | |||
| 379 | if(is_dir($target)) |
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| 380 | { |
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| 381 | self::removeDir($target); |
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| 382 | } |
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| 383 | else |
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| 384 | { |
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| 385 | unlink($target); |
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| 386 | } |
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| 387 | } |
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| 388 | rmdir($path); |
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| 389 | } |
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| 390 | else |
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| 391 | { |
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| 392 | unlink($path); |
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| 393 | } |
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| 394 | } |
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| 395 | |||
| 396 | /** |
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| 397 | * Remove a directory only if it is empty |
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| 398 | * |
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| 399 | * @param string $path Path of the target directory |
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| 400 | * @return void |
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| 401 | */ |
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| 402 | function removeBlankDir($path) |
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| 403 | { |
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| 404 | if(($path = self::isDir($path)) === FALSE) |
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| 405 | { |
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| 406 | return; |
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| 407 | } |
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| 408 | |||
| 409 | $files = array_diff(scandir($path), array('..', '.')); |
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| 410 | |||
| 411 | if(count($files) < 1) |
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| 412 | { |
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| 413 | rmdir($path); |
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| 414 | return; |
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| 415 | } |
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| 416 | |||
| 417 | foreach($files as $file) |
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| 418 | { |
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| 419 | if(($target = self::isDir($path . DIRECTORY_SEPARATOR . $file)) === FALSE) |
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| 420 | { |
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| 421 | continue; |
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| 422 | } |
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| 423 | |||
| 424 | self::removeBlankDir($target); |
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| 425 | } |
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| 426 | } |
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| 427 | |||
| 428 | /** |
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| 429 | * Remove files in the target directory |
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| 430 | * |
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| 431 | * This function keeps the directory structure. |
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| 432 | * |
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| 433 | * @param string $path Path of the target directory |
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| 434 | * @return void |
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| 435 | */ |
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| 436 | View Code Duplication | function removeFilesInDir($path) |
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| 437 | { |
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| 438 | if(($path = self::getRealPath($path)) === FALSE) |
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| 439 | { |
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| 440 | return; |
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| 441 | } |
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| 442 | |||
| 443 | if(is_dir($path)) |
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| 444 | { |
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| 445 | $files = array_diff(scandir($path), array('..', '.')); |
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| 446 | |||
| 447 | foreach($files as $file) |
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| 448 | { |
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| 449 | if(($target = self::getRealPath($path . DIRECTORY_SEPARATOR . $file)) === FALSE) |
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| 450 | { |
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| 451 | continue; |
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| 452 | } |
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| 453 | |||
| 454 | if(is_dir($target)) |
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| 455 | { |
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| 456 | self::removeFilesInDir($target); |
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| 457 | } |
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| 458 | else |
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| 459 | { |
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| 460 | unlink($target); |
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| 461 | } |
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| 462 | } |
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| 463 | } |
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| 464 | else |
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| 465 | { |
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| 466 | if(self::exists($path)) unlink($path); |
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| 467 | } |
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| 468 | |||
| 469 | } |
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| 470 | |||
| 471 | /** |
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| 472 | * Makes file size byte into KB, MB according to the size |
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| 473 | * |
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| 474 | * @see self::returnBytes() |
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| 475 | * @param int $size Number of the size |
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| 476 | * @return string File size string |
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| 477 | */ |
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| 478 | function filesize($size) |
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| 479 | { |
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| 480 | if(!$size) |
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| 481 | { |
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| 482 | return '0Byte'; |
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| 483 | } |
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| 484 | |||
| 485 | if($size === 1) |
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| 486 | { |
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| 487 | return '1Byte'; |
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| 488 | } |
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| 489 | |||
| 490 | if($size < 1024) |
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| 491 | { |
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| 492 | return $size . 'Bytes'; |
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| 493 | } |
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| 494 | |||
| 495 | if($size >= 1024 && $size < 1024 * 1024) |
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| 496 | { |
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| 497 | return sprintf("%0.1fKB", $size / 1024); |
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| 498 | } |
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| 499 | |||
| 500 | return sprintf("%0.2fMB", $size / (1024 * 1024)); |
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| 501 | } |
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| 502 | |||
| 503 | /** |
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| 504 | * Return remote file's content via HTTP |
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| 505 | * |
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| 506 | * If the target is moved (when return code is 300~399), this function follows the location specified response header. |
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| 507 | * |
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| 508 | * @param string $url The address of the target file |
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| 509 | * @param string $body HTTP request body |
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| 510 | * @param int $timeout Connection timeout |
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| 511 | * @param string $method GET/POST |
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| 512 | * @param string $content_type Content type header of HTTP request |
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| 513 | * @param string[] $headers Headers key value array. |
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| 514 | * @param string[] $cookies Cookies key value array. |
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| 515 | * @param string $post_data Request arguments array for POST method |
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| 516 | * @return string If success, the content of the target file. Otherwise: none |
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| 517 | */ |
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| 518 | function getRemoteResource($url, $body = null, $timeout = 3, $method = 'GET', $content_type = null, $headers = array(), $cookies = array(), $post_data = array(), $request_config = array()) |
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| 615 | |||
| 616 | /** |
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| 617 | * Retrieves remote file, then stores it into target path. |
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| 618 | * |
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| 619 | * @param string $url The address of the target file |
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| 620 | * @param string $target_filename The location to store |
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| 621 | * @param string $body HTTP request body |
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| 622 | * @param string $timeout Connection timeout |
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| 623 | * @param string $method GET/POST |
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| 624 | * @param string $content_type Content type header of HTTP request |
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| 625 | * @param string[] $headers Headers key value array. |
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| 626 | * @return bool TRUE: success, FALSE: failed |
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| 627 | */ |
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| 628 | function getRemoteFile($url, $target_filename, $body = null, $timeout = 3, $method = 'GET', $content_type = null, $headers = array(), $cookies = array(), $post_data = array(), $request_config = array()) |
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| 629 | { |
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| 630 | if(!($body = self::getRemoteResource($url, $body, $timeout, $method, $content_type, $headers,$cookies,$post_data,$request_config))) |
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| 638 | |||
| 639 | /** |
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| 640 | * Convert size in string into numeric value |
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| 641 | * |
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| 642 | * @see self::filesize() |
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| 643 | * @param $val Size in string (ex., 10, 10K, 10M, 10G ) |
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| 644 | * @return int converted size |
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| 645 | */ |
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| 646 | function returnBytes($val) |
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| 660 | |||
| 661 | /** |
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| 662 | * Check available memory to load image file |
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| 663 | * |
||
| 664 | * @param array $imageInfo Image info retrieved by getimagesize function |
||
| 665 | * @return bool TRUE: it's ok, FALSE: otherwise |
||
| 666 | */ |
||
| 667 | function checkMemoryLoadImage(&$imageInfo) |
||
| 684 | |||
| 685 | /** |
||
| 686 | * Moves an image file (resizing is possible) |
||
| 687 | * |
||
| 688 | * @param string $source_file Path of the source file |
||
| 689 | * @param string $target_file Path of the target file |
||
| 690 | * @param int $resize_width Width to resize |
||
| 691 | * @param int $resize_height Height to resize |
||
| 692 | * @param string $target_type If $target_type is set (gif, jpg, png, bmp), result image will be saved as target type |
||
| 693 | * @param string $thumbnail_type Thumbnail type(crop, ratio) |
||
| 694 | * @return bool TRUE: success, FALSE: failed |
||
| 695 | */ |
||
| 696 | function createImageFile($source_file, $target_file, $resize_width = 0, $resize_height = 0, $target_type = '', $thumbnail_type = 'crop') |
||
| 891 | |||
| 892 | /** |
||
| 893 | * Reads ini file, and puts result into array |
||
| 894 | * |
||
| 895 | * @see self::writeIniFile() |
||
| 896 | * @param string $filename Path of the ini file |
||
| 897 | * @return array ini array (if the target file does not exist, it returns FALSE) |
||
| 898 | */ |
||
| 899 | function readIniFile($filename) |
||
| 915 | |||
| 916 | /** |
||
| 917 | * Write array into ini file |
||
| 918 | * |
||
| 919 | * $ini['key1'] = 'value1';<br/> |
||
| 920 | * $ini['key2'] = 'value2';<br/> |
||
| 921 | * $ini['section']['key1_in_section'] = 'value1_in_section';<br/> |
||
| 922 | * $ini['section']['key2_in_section'] = 'value2_in_section';<br/> |
||
| 923 | * self::writeIniFile('exmple.ini', $ini); |
||
| 924 | * |
||
| 925 | * @see self::readIniFile() |
||
| 926 | * @param string $filename Target ini file name |
||
| 927 | * @param array $arr Array |
||
| 928 | * @return bool if array contains nothing it returns FALSE, otherwise TRUE |
||
| 929 | */ |
||
| 930 | function writeIniFile($filename, $arr) |
||
| 939 | |||
| 940 | /** |
||
| 941 | * Make array to ini string |
||
| 942 | * |
||
| 943 | * @param array $arr Array |
||
| 944 | * @return string |
||
| 945 | */ |
||
| 946 | function _makeIniBuff($arr) |
||
| 973 | |||
| 974 | /** |
||
| 975 | * Returns a file object |
||
| 976 | * |
||
| 977 | * If the directory of the file does not exist, create it. |
||
| 978 | * |
||
| 979 | * @param string $filename Target file name |
||
| 980 | * @param string $mode File mode for fopen |
||
| 981 | * @return FileObject File object |
||
| 982 | */ |
||
| 983 | function openFile($filename, $mode) |
||
| 991 | |||
| 992 | /** |
||
| 993 | * Check whether the given file has the content. |
||
| 994 | * |
||
| 995 | * @param string $filename Target file name |
||
| 996 | * @return bool Returns TRUE if the file exists and contains something. |
||
| 997 | */ |
||
| 998 | function hasContent($filename) |
||
| 1002 | |||
| 1003 | /** |
||
| 1004 | * Check file exists. |
||
| 1005 | * |
||
| 1006 | * @param string $filename Target file name |
||
| 1007 | * @return bool Returns FALSE if the file does not exists, or Returns full path file(string). |
||
| 1008 | */ |
||
| 1009 | function exists($filename) |
||
| 1014 | |||
| 1015 | /** |
||
| 1016 | * Check it is dir |
||
| 1017 | * |
||
| 1018 | * @param string $dir Target dir path |
||
| 1019 | * @return bool Returns FALSE if the dir is not dir, or Returns full path of dir(string). |
||
| 1020 | */ |
||
| 1021 | function isDir($path) |
||
| 1026 | |||
| 1027 | /** |
||
| 1028 | * Check is writable dir |
||
| 1029 | * |
||
| 1030 | * @param string $path Target dir path |
||
| 1031 | * @return bool |
||
| 1032 | */ |
||
| 1033 | function isWritableDir($path) |
||
| 1053 | } |
||
| 1054 | |||
| 1057 |
In PHP, under loose comparison (like
==, or!=, orswitchconditions), values of different types might be equal.For
stringvalues, the empty string''is a special case, in particular the following results might be unexpected: