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<?php |
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namespace Ellumilel\Helpers; |
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/** |
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* Class PHPExcelHelper |
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* @package Ellumilel\Helpers |
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*/ |
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class ExcelHelper |
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{ |
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/** |
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* @link http://office.microsoft.com/en-us/excel-help/excel-specifications-and-limits-HP010073849.aspx |
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* XFE1048577 |
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*/ |
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const EXCEL_MAX_ROW = 1048576; |
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const EXCEL_MAX_RANGE = 2147483647; |
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const EXCEL_MAX_COL = 16384; |
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/** |
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* @param string $dateInput |
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* |
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* @return mixed |
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*/ |
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public static function convertDateTime($dateInput) |
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{ |
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$epoch = 1900; |
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$norm = 300; |
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$year = $month = $day = $offset = $seconds = 0; |
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$dateTime = $dateInput; |
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if (preg_match("/(\d{4})\-(\d{2})\-(\d{2})/", $dateTime, $matches)) { |
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$year = $matches[1]; |
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$month = $matches[2]; |
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$day = $matches[3]; |
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} |
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if (preg_match("/(\d{2}):(\d{2}):(\d{2})/", $dateTime, $matches)) { |
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$seconds = ($matches[1] * 60 * 60 + $matches[2] * 60 + $matches[3]) / 86400; |
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} |
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if ("$year-$month-$day" == '1899-12-31' || "$year-$month-$day" == '1900-01-00') { |
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return $seconds; |
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} |
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if ("$year-$month-$day" == '1900-02-29') { |
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return 60 + $seconds; |
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} |
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$range = $year - $epoch; |
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// check leapDay |
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$leap = (new \DateTime($dateInput))->format('L'); |
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$mDays = [31, ($leap ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]; |
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if (self::checkEpoch($year, $month, $day, $mDays[$month - 1])) { |
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return 0; |
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} |
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$days = $day + ($range * 365) + array_sum(array_slice($mDays, 0, $month - 1)); |
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$days += intval(($range) / 4) - intval(($range + $offset) / 100); |
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$days += intval(($range + $offset + $norm) / 400) - intval($leap); |
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if ($days > 59) { |
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$days++; |
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} |
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return $days + $seconds; |
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} |
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/** |
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* @param $year |
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* @param $month |
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* @param $day |
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* @param $dayCheck |
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* |
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* @return bool |
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*/ |
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private function checkEpoch($year, $month, $day, $dayCheck) |
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{ |
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if (($year < 1900 || $year > 9999) || ($month < 1 || $month > 12) || $day < 1 || $day > $dayCheck) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @param $val |
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* |
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* @return mixed |
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*/ |
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public static function xmlspecialchars($val) |
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{ |
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return str_replace("'", "'", htmlspecialchars($val)); |
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} |
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/** |
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* @param int $rowNumber |
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* @param int $columnNumber |
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* |
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* @return string Cell label/coordinates (A1, C3, AA42) |
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*/ |
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public static function xlsCell($rowNumber, $columnNumber) |
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{ |
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$n = $columnNumber; |
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for ($r = ""; $n >= 0; $n = intval($n / 26) - 1) { |
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$r = chr($n % 26 + 0x41).$r; |
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} |
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return $r.($rowNumber + 1); |
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} |
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/** |
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* @link https://msdn.microsoft.com/ru-RU/library/aa365247%28VS.85%29.aspx |
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* |
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* @param string $filename |
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* |
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* @return mixed |
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*/ |
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public static function checkFilename($filename) |
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{ |
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$invalidCharacter = array_merge( |
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array_map('chr', range(0, 31)), |
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['<', '>', '?', '"', ':', '|', '\\', '/', '*', '&'] |
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); |
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return str_replace($invalidCharacter, '', $filename); |
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} |
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/** |
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* @todo check escaping |
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* |
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* @param string $cellFormat |
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* |
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* @return string |
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*/ |
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public static function escapeCellFormat($cellFormat) |
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{ |
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$ignoreUntil = ''; |
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$escaped = ''; |
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for ($i = 0, $ix = strlen($cellFormat); $i < $ix; $i++) { |
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$c = $cellFormat[$i]; |
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if ($ignoreUntil == '' && $c == '[') { |
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$ignoreUntil = ']'; |
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} else { |
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if ($ignoreUntil == '' && $c == '"') { |
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$ignoreUntil = '"'; |
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} else { |
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if ($ignoreUntil == $c) { |
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$ignoreUntil = ''; |
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} |
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} |
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} |
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if ($ignoreUntil == '' && |
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($c == ' ' || $c == '-' || $c == '(' || $c == ')') && |
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($i == 0 || $cellFormat[$i - 1] != '_') |
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) { |
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$escaped .= "\\".$c; |
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} else { |
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$escaped .= $c; |
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} |
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} |
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return $escaped; |
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} |
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} |
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ellumilel /
php-excel-writer
