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<?php |
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namespace Issei\StreamedCsvResponse; |
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/** |
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* Writes the csv row to stdout. |
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* |
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* {@internal Don't use this in user-land code }} |
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* |
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* @author Issei Murasawa <[email protected]> |
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*/ |
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class CsvWriter |
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{ |
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/** |
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* @var resource |
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*/ |
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private $out; |
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/** |
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* @var string|null |
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*/ |
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private $encodeTo; |
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/** |
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* @var string[] |
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*/ |
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private $charsNeedingEnclosing; |
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public function __construct($encodeTo = null) |
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{ |
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$this->out = fopen('php://output', 'wt'); |
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if (null !== $encodeTo && 'UTF-8' !== strtoupper($encodeTo)) { |
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$this->encodeTo = $encodeTo; |
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} |
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$this->charsNeedingEnclosing = array( |
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',', // separator |
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'"', // enclosure & escaper |
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"\n", |
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"\r", |
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); |
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} |
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public function __destruct() |
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{ |
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fclose($this->out); |
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} |
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/** |
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* Writes the csv to stdout. |
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* |
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* @param array|\Traversable $row |
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*/ |
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public function writeRow($row) |
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{ |
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Assert::isIterable($row, 'Every value of $rows should be an array or an instance of \Traversable.'); |
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$separator = ''; |
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foreach ($row as $cell) { |
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fwrite($this->out, $separator . $this->formatCell($cell)); |
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if ('' === $separator) { |
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$separator = ','; |
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} |
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} |
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fwrite($this->out, "\r\n"); |
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} |
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/** |
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* Returns the formatted cell. |
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* |
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* @param string $cell |
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* |
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* @return string |
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*/ |
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private function formatCell($cell) |
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{ |
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if ('' === $cell) { |
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return $cell; |
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} |
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// auto encoding |
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if (null !== $this->encodeTo) { |
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$cell = mb_convert_encoding($cell, $this->encodeTo, 'UTF-8'); |
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} |
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foreach ($this->charsNeedingEnclosing as $charNeedingEnclosing) { |
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if (false !== strpos($cell, $charNeedingEnclosing)) { |
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// enclosing |
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return '"' . str_replace('"', '""', $cell) . '"'; |
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} |
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} |
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return $cell; |
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} |
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} |
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issei-m /
StreamedCsvResponse
