Complex classes like CsvFormat 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 CsvFormat, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 19 | class CsvFormat implements CsvFormatInterface |
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| 20 | { |
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| 21 | use GetOptionTrait; |
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| 22 | |||
| 23 | const DEFAULT_DELIMITER = ','; |
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| 24 | const DEFAULT_NULL = '\\N'; |
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| 25 | const DEFAULT_HEADER_ROW = -1; |
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| 26 | const DEFAULT_DATA_START = 1; |
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| 27 | const DEFAULT_QUOTE = '"'; |
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| 28 | const DEFAULT_ESCAPE = '\\'; |
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| 29 | const DEFAULT_LIMIT = -1; |
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| 30 | const DEFAULT_DOUBLE_QUOTE = false; |
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| 31 | const DEFAULT_ENCODING = 'UTF-8'; |
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| 32 | const DEFAULT_NEW_LINE = "\n"; |
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| 33 | const DEFAULT_BOM = null; |
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| 34 | |||
| 35 | const OPTION_DELIMITER = 'delimiter'; |
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| 36 | const OPTION_NULL = 'null'; |
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| 37 | const OPTION_HEADER_ROW = 'headerRow'; |
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| 38 | const OPTION_DATA_START = 'dataStart'; |
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| 39 | const OPTION_NEW_LINE = 'newLine'; |
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| 40 | const OPTION_QUOTE = 'quote'; |
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| 41 | const OPTION_ESCAPE = 'escape'; |
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| 42 | const OPTION_LIMIT = 'limit'; |
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| 43 | const OPTION_DOUBLE_QUOTE = 'doubleQuote'; |
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| 44 | const OPTION_BOM = 'bom'; |
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| 45 | const OPTION_ENCODING = 'encoding'; |
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| 46 | |||
| 47 | /** @var string */ |
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| 48 | protected $delimiter; |
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| 49 | /** @var string */ |
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| 50 | protected $quote; |
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| 51 | /** @var string */ |
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| 52 | protected $nullValue; |
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| 53 | /** @var int */ |
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| 54 | protected $headerRow; |
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| 55 | /** @var string[] */ |
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| 56 | protected $newLines; |
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| 57 | /** @var string */ |
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| 58 | protected $escape; |
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| 59 | /** @var int */ |
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| 60 | protected $limit; |
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| 61 | /** @var bool */ |
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| 62 | protected $doubleQuote; |
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| 63 | /** @var int */ |
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| 64 | protected $dataStart; |
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| 65 | /** @var string[]|string|null */ |
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| 66 | protected $boms; |
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| 67 | /** @var string */ |
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| 68 | protected $encoding; |
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| 69 | |||
| 70 | /** |
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| 71 | * @param array $options -delimiter <string> (Default: ,) Character to use between fields |
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| 72 | * -quoteCharacter <string> (Default: ") |
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| 73 | * -nullOutput <string> (Default: \N) |
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| 74 | * -headerRow <int> (Default: -1) -1 for no header row. (1 is the first line of the file) |
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| 75 | * -dataStart <int> (Default: 1) The line where the data starts (1 is the first list of the |
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| 76 | * file) |
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| 77 | * -lineTerminator <array> (Default: ["\n","\r","\r\n"]) |
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| 78 | * -escape <string> (Default: \\) Character to use for escaping |
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| 79 | * -limit <int> Total number of data rows to return |
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| 80 | * -doubleQuote <bool> instances of quote in fields are indicated by a double quote |
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| 81 | * -bom <array> (Default: BOM_ALL) Specify a ByteOrderMark for this file (see Bom::BOM_*) |
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| 82 | * -encoding <string> (Default: UTF-8) Specify the encoding of the csv file |
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| 83 | */ |
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| 84 | 16 | public function __construct(array $options = []) |
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| 99 | |||
| 100 | /** |
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| 101 | * @return string |
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| 102 | */ |
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| 103 | 27 | public function getDelimiter() |
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| 107 | |||
| 108 | /** |
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| 109 | * @param string $delimiter |
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| 110 | * |
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| 111 | * @return static |
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| 112 | */ |
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| 113 | 2 | public function setDelimiter($delimiter) |
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| 118 | |||
| 119 | /** |
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| 120 | * @return string |
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| 121 | */ |
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| 122 | 26 | public function getQuote() |
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| 126 | |||
| 127 | /** |
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| 128 | * @return bool |
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| 129 | */ |
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| 130 | 20 | public function hasQuote() |
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| 134 | |||
| 135 | /** |
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| 136 | * @param string $quote |
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| 137 | * |
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| 138 | * @return static |
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| 139 | */ |
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| 140 | 1 | public function setQuote($quote) |
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| 145 | |||
| 146 | /** |
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| 147 | * @return string |
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| 148 | */ |
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| 149 | 16 | public function getNullValue() |
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| 153 | |||
| 154 | /** |
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| 155 | * @param string $nullValue |
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| 156 | * |
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| 157 | * @return static |
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| 158 | */ |
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| 159 | 1 | public function setNullValue($nullValue) |
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| 164 | |||
| 165 | /** |
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| 166 | * @return bool |
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| 167 | */ |
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| 168 | 13 | public function hasHeaderRow() |
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| 172 | |||
| 173 | /** |
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| 174 | * @param int $headerRow |
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| 175 | * |
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| 176 | * @return static |
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| 177 | */ |
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| 178 | 2 | public function setHeaderRow($headerRow) |
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| 183 | |||
| 184 | /** |
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| 185 | * @return int |
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| 186 | */ |
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| 187 | 7 | public function getHeaderRow() |
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| 191 | |||
| 192 | /** |
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| 193 | * @return int |
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| 194 | */ |
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| 195 | 13 | public function getDataStart() |
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| 202 | |||
| 203 | /** |
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| 204 | * @param int $row |
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| 205 | * |
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| 206 | * @return static |
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| 207 | */ |
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| 208 | 2 | public function setDataStart($row) |
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| 213 | |||
| 214 | /** |
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| 215 | * Type type of file format (defined in FileFormatType::) |
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| 216 | * |
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| 217 | * @return string |
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| 218 | */ |
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| 219 | 7 | public function getType() |
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| 223 | |||
| 224 | /** |
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| 225 | * @return string |
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| 226 | */ |
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| 227 | 29 | public function getEscape() |
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| 231 | |||
| 232 | /** |
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| 233 | * @param string $escape |
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| 234 | * |
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| 235 | * @return static |
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| 236 | */ |
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| 237 | 1 | public function setEscape($escape) |
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| 242 | |||
| 243 | /** |
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| 244 | * @return bool |
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| 245 | */ |
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| 246 | 3 | public function hasEscape() |
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| 250 | |||
| 251 | /** |
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| 252 | * Get the limit that should be returned (-1 for no limit) |
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| 253 | * |
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| 254 | * @return int |
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| 255 | */ |
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| 256 | 12 | public function getLimit() |
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| 260 | |||
| 261 | /** |
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| 262 | * Set the limit of the number of items to be returned (-1 for not limit) |
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| 263 | * |
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| 264 | * @param int $limit |
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| 265 | * |
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| 266 | * @return static |
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| 267 | */ |
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| 268 | 1 | public function setLimit($limit) |
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| 273 | |||
| 274 | /** |
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| 275 | * @return bool |
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| 276 | */ |
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| 277 | 24 | public function useDoubleQuotes() |
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| 281 | |||
| 282 | /** |
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| 283 | * @param bool $doubleQuote |
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| 284 | * |
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| 285 | * @return static |
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| 286 | */ |
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| 287 | 1 | public function setDoubleQuote($doubleQuote) |
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| 292 | |||
| 293 | /** |
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| 294 | * @return string |
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| 295 | */ |
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| 296 | 24 | public function getEncoding() |
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| 304 | |||
| 305 | /** |
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| 306 | * @param string $encoding |
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| 307 | * |
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| 308 | * @return static |
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| 309 | */ |
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| 310 | 1 | public function setEncoding($encoding) |
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| 315 | |||
| 316 | /** |
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| 317 | * @return string[] |
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| 318 | */ |
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| 319 | 12 | public function getNewLines() |
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| 323 | |||
| 324 | /** |
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| 325 | * @param string|string[] $newLine |
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| 326 | * |
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| 327 | * @return static |
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| 328 | */ |
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| 329 | 16 | public function setNewLine($newLine) |
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| 334 | |||
| 335 | /** |
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| 336 | * Get a new line for writing |
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| 337 | * |
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| 338 | * @return string |
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| 339 | */ |
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| 340 | 7 | public function getNewLine() |
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| 344 | |||
| 345 | /** |
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| 346 | * @param null|string[]|string $bom |
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| 347 | * |
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| 348 | * @return static |
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| 349 | */ |
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| 350 | 16 | public function setBom($bom) |
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| 359 | |||
| 360 | /** |
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| 361 | * @return string[] |
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| 362 | */ |
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| 363 | 12 | public function getBoms() |
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| 373 | |||
| 374 | /** |
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| 375 | * Get a ByteOrderMark for writing if applicable |
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| 376 | * |
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| 377 | * @return string|null |
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| 378 | */ |
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| 379 | 20 | public function getBom() |
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| 383 | |||
| 384 | /** |
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| 385 | * @return string[] |
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| 386 | */ |
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| 387 | 10 | private function getDefaultBoms() |
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| 391 | } |
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| 392 |