假设:
$this->objPHPExcelReader = PHPExcel_IOFactory::createReaderForFile($this->config['file']);
$this->objPHPExcelReader->setLoadSheetsOnly(array($this->config['worksheet']));
$this->objPHPExcelReader->setReadDataOnly(true);
$this->objPHPExcel = $this->objPHPExcelReader->load($this->config['file']);
我可以遍历这样的行,但它非常慢,即在一个3MB的Excel文件中,工作表上有“EL”列,它需要每行1秒:
foreach ($this->objPHPExcel->setActiveSheetIndex(0)->getRowIterator() as $row)
{
$dataset = array();
$cellIterator = $row->getCellIterator();
$cellIterator->setIterateOnlyExistingCells(false);
foreach ($cellIterator as $cell)
{
if (!is_null($cell))
{
$dataset[] = $cell->getCalculatedValue();
}
}
$this->datasets[] = $dataset;
}
当我像这样迭代时,它显着更快(在30秒内大约2000行),但我将不得不转换字母,例如“EL”到一个数字:
$highestColumm = $this->objPHPExcel->setActiveSheetIndex(0)->getHighestColumn(); // e.g. "EL"
$highestRow = $this->objPHPExcel->setActiveSheetIndex(0)->getHighestRow();
$number_of_columns = 150; // TODO: figure out how to get the number of cols as int
for ($row = 1; $row < $highestRow + 1; $row++) {
$dataset = array();
for ($column = 0; $column < $number_of_columns; $column++) {
$dataset[] = $this->objPHPExcel->setActiveSheetIndex(0)->getCellByColumnAndRow($column, $row)->getValue();
}
$this->datasets[] = $dataset;
}
有没有办法将最高列作为整数(例如“28”)而不是Excel样式的字母(例如“AB”)?
答案 0 :(得分:72)
$colNumber = PHPExcel_Cell::columnIndexFromString($colString);
从'A'的$ colString返回1,从'Z'返回26,从'AA'返回27,等等。
和(几乎)反向
$colString = PHPExcel_Cell::stringFromColumnIndex($colNumber);
从$ colNumber返回'A',从25返回'Z',从26返回'AA'等。
修改强>
一些有用的技巧:
工作表类有一个toArray()方法:
$this->datasets = $this->objPHPExcel->setActiveSheetIndex(0)->toArray();
接受以下参数:
* @param mixed $nullValue Value returned in the array entry if a cell doesn't exist
* @param boolean $calculateFormulas Should formulas be calculated?
* @param boolean $formatData Should formatting be applied to cell values?
* @param boolean $returnCellRef False - Return a simple array of rows and columns indexed by number counting from zero
* True - Return rows and columns indexed by their actual row and column IDs
虽然它确实使用了迭代器,但是会稍慢一些
OR
利用PHP的increment character strings Perl Style
功能$highestColumm = $this->objPHPExcel->setActiveSheetIndex(0)->getHighestColumn(); // e.g. "EL"
$highestRow = $this->objPHPExcel->setActiveSheetIndex(0)->getHighestRow();
$highestColumm++;
for ($row = 1; $row < $highestRow + 1; $row++) {
$dataset = array();
for ($column = 'A'; $column != $highestColumm; $column++) {
$dataset[] = $this->objPHPExcel->setActiveSheetIndex(0)->getCell($column . $row)->getValue();
}
$this->datasets[] = $dataset;
}
如果你正在处理大量的行,你可能会注意到++ $ row在$ row ++上的性能提升
答案 1 :(得分:1)
不确定您的类是否具有内置方法,但您始终可以在列索引字符串的每个字母上使用ord()函数。您当然必须减去'A'的基值,并从字符串最右侧的每个位置乘以26 ^ x。类似的东西:
$input_string = 'BC';
$base_value = 64;
$decimal_value = 26;
$column_index = 0;
for ($i = 0; $i < strlen($input_string); $i++) {
$char_value = ord($input_string[$i]);
$char_value -= $base_value;
$char_value *= pow($decimal_value, (strlen($input_string) - ($i + 1)));
$column_index += $char_value;
}
echo $column_index;
基本上这会使'BC'相等(2 * 26 ^ 1)+(3 * 26 ^ 0)= 55。
$ input_string是列索引字符串,$ base_value是'A'的ord()值减1,$ decimal_value是A0的值。应该可以处理任何数字列。经过测试。希望这会有所帮助。
答案 2 :(得分:1)
这是dqhendricks答案的简化版本。我已添加到副本,一个函数假设您输入完整的Excel单元格引用(即“AB12”),另一个函数假设您只输入列引用(即“AB”)。它们都返回基于零的索引。
输入完整单元格参考
function getIndex ($cell) {
// Strip cell reference down to just letters
$let = preg_replace('/[^A-Z]/', '', $cell);
// Iterate through each letter, starting at the back to increment the value
for ($num = 0, $i = 0; $let != ''; $let = substr($let, 0, -1), $i++)
$num += (ord(substr($let, -1)) - 65) * pow(26, $i);
return $num;
}
仅输入列参考
function getIndex ($let) {
// Iterate through each letter, starting at the back to increment the value
for ($num = 0, $i = 0; $let != ''; $let = substr($let, 0, -1), $i++)
$num += (ord(substr($let, -1)) - 65) * pow(26, $i);
return $num;
}
该函数从字符串的后面到前面以增加列的值。它使用ord()
函数来获取字符的数值,然后减去字母值以给出本地列值。最后它乘以26的当前功率。
答案 3 :(得分:1)
最简单的解决方案是 $ getColumnIndexFromString = PHPExcel_Cell :: columnIndexFromString($ highestColumn);
答案 4 :(得分:1)
我建议将excel转换为数组,从空元素中清除它,然后计算列数:
protected function getColumnsCheck($file, $col_number) {
if (strstr($file, ".xls") != false && strstr($file, ".xlsx") != false) {
$fileType = PHPExcel_IOFactory::identify($file);
$objReader = PHPExcel_IOFactory::createReader($fileType);
$objPHPExcel = $objReader->load($file);
$columns_empty = $objPHPExcel->getActiveSheet(0)->toArray()[0];
$columns = array_filter($columns_empty);
return ($col_number==count($columns));
}
return false;
}
答案 5 :(得分:0)
function getNameFromNumber($num) {//(Example 0 = A, 1 = B)
$numeric = $num % 26;
$letter = chr(65 + $numeric);
$num2 = intval($num / 26);
if ($num2 > 0) {
return getNameFromNumber($num2 - 1) . $letter;
} else {
return $letter;
}
}
getNameFromNumber(0)//返回A
答案 6 :(得分:0)
由于这个问题已经有 10 年的历史了,这里引用的包不再是最新的了:
以下是使用 phpspreadsheet 的方法:
$colNumber = \PhpOffice\PhpSpreadsheet\Cell\Coordinate::columnIndexFromString($colString); // e.g. 5
来源: https://phpspreadsheet.readthedocs.io/en/latest/topics/accessing-cells/
答案 7 :(得分:-2)
/**
*
*/
function number_to_alphabet($number) {
$number = intval($number);
if ($number <= 0) {
return '';
}
$alphabet = '';
while($number != 0) {
$p = ($number - 1) % 26;
$number = intval(($number - $p) / 26);
$alphabet = chr(65 + $p) . $alphabet;
}
return $alphabet;
}
/**
* Required PHP 5.6.
* @see: http://php.net/manual/en/language.operators.arithmetic.php
*/
function alphabet_to_number($string) {
$string = strtoupper($string);
$length = strlen($string);
$number = 0;
$level = 1;
while ($length >= $level ) {
$char = $string[$length - $level];
$c = ord($char) - 64;
$number += $c * (26 ** ($level-1));
$level++;
}
return $number;
}
测试:
for ($x=1; $x<=1000; $x++) {
echo 'number_to_alphabet('.$x.') = ',$y = number_to_alphabet($x),'; ';
echo 'alphabet_to_number('.$y.') = '.alphabet_to_number($y).'; ';
echo PHP_EOL;
}