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<?php |
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namespace Palmtree\Csv; |
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/** |
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* Writes an array to a CSV file. |
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*/ |
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class Writer extends AbstractCsv |
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{ |
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/** @var string */ |
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protected $fopenMode = 'w+'; |
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/** @var string */ |
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protected $lineEnding = "\r\n"; |
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/** @var int */ |
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protected $bytesWritten = 0; |
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public static function write($file, $data) |
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{ |
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$writer = new static($file); |
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$writer->setData($data); |
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$writer->closeFileHandle(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function closeFileHandle() |
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{ |
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$this->trimTrailingLineEnding(); |
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parent::closeFileHandle(); |
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} |
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/** |
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* Sets headers and all rows on the CSV file and |
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* then closes the file handle. |
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* |
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* @param $data |
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*/ |
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public function setData($data) |
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{ |
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if ($this->hasHeaders()) { |
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$this->setHeaders(array_keys(reset($data))); |
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} |
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$this->addRows($data); |
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} |
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/** |
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* @param array $headers |
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*/ |
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public function setHeaders(array $headers) |
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{ |
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// We're setting headers so start again with a new file handle. |
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$this->createFileHandle(); |
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$this->addRow($headers); |
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} |
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/** |
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* Adds multiple rows of data to the CSV file. |
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* |
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* @param array $rows |
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*/ |
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public function addRows($rows) |
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{ |
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foreach ($rows as $row) { |
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$this->addRow($row); |
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} |
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} |
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/** |
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* Adds a row of data to the CSV file. |
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* |
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* @param array $row Row of data to add to the file. |
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* |
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* @return bool Whether the row was written to the file. |
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*/ |
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public function addRow($row) |
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{ |
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if (!$this->getFileHandle()) { |
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$this->createFileHandle(); |
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} |
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$result = fwrite($this->getFileHandle(), $this->getCsvString($row)); |
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if ($result === false) { |
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// @todo: handle error |
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return false; |
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} |
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$this->bytesWritten += $result; |
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return true; |
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} |
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/** |
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* Returns the line ending delimiter used to separate rows |
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* in the CSV file. |
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* |
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* @return string |
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*/ |
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public function getLineEnding() |
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{ |
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return $this->lineEnding; |
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} |
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/** |
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* Sets the line ending delimiter used to separate rows |
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* in the CSV file. |
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* |
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* @param string $lineEnding |
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* |
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* @return Writer |
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*/ |
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public function setLineEnding($lineEnding) |
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{ |
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$this->lineEnding = $lineEnding; |
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return $this; |
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} |
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/** |
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* Returns a string representation of a row to be written |
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* as a line in a CSV file. |
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* |
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* @param array $row |
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* |
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* @return string |
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*/ |
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protected function getCsvString($row) |
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{ |
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$result = $this->getEnclosure(); |
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$glue = $this->getEnclosure() . $this->getDelimiter() . $this->getEnclosure(); |
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$result .= implode($glue, $this->escapeEnclosure($row)); |
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$result .= $this->getEnclosure(); |
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$result .= $this->getLineEnding(); |
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return $result; |
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} |
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/** |
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* Trims the line ending delimiter from the end of the CSV file. |
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* RFC-4180 states CSV files should not contain a trailing new line. |
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*/ |
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protected function trimTrailingLineEnding() |
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{ |
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if ($this->bytesWritten > 0 && $this->getFileHandle()) { |
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// Only trim the file if it ends with the line ending delimiter. |
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$length = mb_strlen($this->getLineEnding()); |
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fseek($this->getFileHandle(), -$length, SEEK_END); |
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$chunk = fread($this->getFileHandle(), $length); |
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if ($chunk === $this->getLineEnding()) { |
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ftruncate($this->getFileHandle(), $this->bytesWritten - $length); |
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} |
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} |
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1 |
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} |
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/** |
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* Escapes the enclosure character recursively. |
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* RFC-4180 states the enclosure character (usually double quotes) should be |
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* escaped by itself, so " becomes "". |
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* |
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* @param mixed $data Array or string of data to escape. |
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* |
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* @return mixed Escaped data |
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*/ |
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protected function escapeEnclosure($data) |
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{ |
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if (is_array($data)) { |
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foreach ($data as $key => $value) { |
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$data[$key] = $this->escapeEnclosure($value); |
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} |
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} else { |
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$data = str_replace($this->getEnclosure(), str_repeat($this->getEnclosure(), 2), $data); |
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} |
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return $data; |
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} |
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} |
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palmtreephp /
csv
