PHP range() 从 A 到 ZZ？答案

【问题标题】：PHP range() from A to ZZ?PHP range() 从 A 到 ZZ？
【发布时间】：2013-01-11 12:52:53
【问题描述】：

是否可以使用 PHP 获得从 A 到 ZZ* 的范围？

a b c ... aa ... zx zy zz

对我来说这不起作用：

range('A', 'ZZ');

它适用于 PHPExcel，当它给出 BE 作为最高字段时，我会遍历所有列。在这种情况下，我只得到 A，B：

range ('A', 'BE')

【问题讨论】：

phpspreadsheet.readthedocs.io/en/latest

标签： php range

【解决方案1】：

利用 PHP 的“perl 风格”递增字符的能力

$letters = array();
$letter = 'A';
while ($letter !== 'AAA') {
    $letters[] = $letter++;
}

但您也可以使用简单的整数值，并利用 PHPExcel 的内置 PHPExcel_Cell::stringFromColumnIndex() 方法

编辑

从 PHP 5.5 开始，您还可以使用生成器来避免实际在内存中构建数组

function excelColumnRange($lower, $upper) {
    ++$upper;
    for ($i = $lower; $i !== $upper; ++$i) {
        yield $i;
    }
}

foreach (excelColumnRange('A', 'ZZ') as $value) {
    echo $value, PHP_EOL;
}

【讨论】：

有趣的方法！我从来不知道你可以做一些奇怪的事情，比如增加字符串，但这似乎工作得很好:)
循环中结束条件的主要问题是“不要使用 > 或
@MarkBaker 你知道我们不能使用递减运算符的原因吗？为什么“不要在循环中使用 > 或
Decrementor 根本没有为 alpha 编码，但不知道为什么它从来没有。为什么不 > 或
想一想，我怀疑减量运算符没有为字符实现，因为当你减 'A' 或 'a' 时会发生什么......它不能简单地处理作为数字减量器

【解决方案2】：

试试这个-（测试工作正常）

function createColumnsArray($end_column, $first_letters = '')
{
  $columns = array();
  $length = strlen($end_column);
  $letters = range('A', 'Z');

  // Iterate over 26 letters.
  foreach ($letters as $letter) {
      // Paste the $first_letters before the next.
      $column = $first_letters . $letter;

      // Add the column to the final array.
      $columns[] = $column;

      // If it was the end column that was added, return the columns.
      if ($column == $end_column)
          return $columns;
  }

  // Add the column children.
  foreach ($columns as $column) {
      // Don't itterate if the $end_column was already set in a previous itteration.
      // Stop iterating if you've reached the maximum character length.
      if (!in_array($end_column, $columns) && strlen($column) < $length) {
          $new_columns = createColumnsArray($end_column, $column);
          // Merge the new columns which were created with the final columns array.
          $columns = array_merge($columns, $new_columns);
      }
  }

  return $columns;
}
echo "<pre>";
print_r( createColumnsArray('BZ'));

复制自http://php.net/range

【讨论】：

【解决方案3】：

for ($i = 'A'; $i !== 'AC'; $i++){
    echo $i.', '; //A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, AA, AB,
}

它正在工作

【讨论】：

【解决方案4】：

您可以组合两个 foreach 循环来生成类似的内容。

// Single letters
foreach(range('A', 'Z') as $letter) {
    echo $letter;
}

// AA-ZZ combinations
foreach(range('A', 'Z') as $letter1) {
    foreach(range('A', 'Z') as $letter2) {
        echo $letter1 . $letter2;
    }
}

【讨论】：

【解决方案5】：

使用内置的range 是不可能的：

添加了对字符序列和递减数组的支持 4.1.0。字符序列值的长度限制为 1。如果输入的长度大于 1，则仅使用第一个字符。

但是，本质上，您在这里所做的是从使用 26 位 a 的数字系统中的 1 向上计数到 z。因此，您可以通过计数、转换为基数 26（使用数字 0 到 9 和 a 到 p）然后将数字“转换”到范围 a 到z.

【讨论】：

【解决方案6】：

更好的选择（效果很好）

for ($i = 'a'; $i < 'zz'; $i++) 
    echo $i."<br>";

【讨论】：

它不会给出OP提到的'zz'完成值，你如何修改才能给出？
使用是危险的

【解决方案7】：

您当然可以编写自己的函数来执行此操作，因为 php 中的 range() 函数似乎不支持此功能。这应该很容易，因为您可以将 range 函数嵌套在另一个循环中。像这样的：

foreach(range('a', 'z') as $outer) {
  foreach(range('a', 'z') as $inner) {
    print($outer.$inner);
  }
}

【讨论】：

【解决方案8】：

请检查这个简单的增加字符的解决方案。

How to list from A to Z in PHP, and then on to AA, AB, AC, etc

使用此递归函数获得从 A 到 ZZ 的确切范围

function myRange($end_column = '', $first_letters = '') {
    $columns = array();
    $length = strlen($end_column);
    $letters = range('A', 'Z');

    // Iterate over 26 letters.
    foreach ($letters as $letter) {
      // Paste the $first_letters before the next.
      $column = $first_letters . $letter; 
      // Add the column to the final array.
      $columns[] = $column;
      // If it was the end column that was added, return the columns.
      if ($column == $end_column)
          return $columns;
    }

    // Add the column children.
    foreach ($columns as $column) {
      // Don't itterate if the $end_column was already set in a previous itteration.
      // Stop iterating if you've reached the maximum character length.
      if (!in_array($end_column, $columns) && strlen($column) < $length) {
          $new_columns = myRange($end_column, $column);
          // Merge the new columns which were created with the final columns array.
          $columns = array_merge($columns, $new_columns);
      }
    }

    return $columns;
}

调用函数like.

print_r(myRange('ZZ'));

会给你结果

一个乙 C . . . 中兴 ZY ZZ

【讨论】：

【解决方案9】：

这是一个简化的解决方案，您可以在其中定义要生成的行数和列数。这样您将分配更少的内存。

// Get cell names for excel
function generate_excel_cell_names($row_cnt, $col_cnt){
    $excel_cells = [];

    // Note: Row and col indexes are starting from 1
    for ($excel_row=1; $excel_row <= $row_cnt; $excel_row++) { 
        $excel_col = 'A';
        for ($col_index = 1; $col_index <= $col_cnt; $col_index++)
        {
            $excel_cells[$excel_row][$col_index] = $excel_col.$excel_row;
            $excel_col++;
        }
    }
    return $excel_cells;
}

【讨论】：

【解决方案10】：

这对我很有效。

function create_columns_range($start = 'A', $end = 'ZZ'){
    $return_range = [];
    for ($i = $start; $i !== $end; $i++){
        $return_range[] = $i;
    }
    return $return_range;
}

要使用它，只需调用：

$range = create_columns_range('A', 'ZZ');
print_r(range);

【讨论】：

【解决方案11】：

这是我能帮到你的（生成从 A 到 Z 的数组）。

$a = range(65, 90);
array_walk($a, 'chr');

查看chr 和array_walk

【讨论】：

OP 需要在 Z 之后进入 'AA', 'AB' , ...。此外，您的代码严格等同于 $a = range('A', 'Z')。哪个更简单，更清晰。

【解决方案12】：

我使用 alpha2num() 将 alpha 转换为数字，然后在循环中使用它。有了这个，我可以使用任何值作为开始和结束来获取范围。

// to convert alpha to number
function alpha2num($a) {
    $l = strlen($a);
    $n = 0;
    for($i = 0; $i < $l; $i++)
        $n = $n*26 + ord($a[$i]) - 0x40;

    return $n-1;
}

// to convert number back to alpha
function num2alpha($n)
{
    for($r = ""; $n >= 0; $n = intval($n / 26) - 1)
    $r = chr($n%26 + 0x41) . $r;
    return $r;
}

function get_range($start_column, $end_column)
{
    $s = alpha2num($start_column); // get start number
    $e = alpha2num($end_column); // get end num

    $columns = array();

    // loop from start to end and change back the number to alpha to be stored in array
    for($i=$s; $i<=$e; $i++)
        $columns[] = num2alpha($i);

    return $columns;
}

// usage
$columns = get_range('Z', 'BA'));

【讨论】：

【解决方案13】：

$atoz = range('A', 'Z');
$target = range('A', 'Z');

$result = $atoz;
foreach ($target as $val) {
    $step = array_map(function ($elem) use ($val) {
            return $val. $elem;
        }, $atoz);

    $result = array_merge($result, $step);
}

【讨论】：

这个答案缺少教育解释。

【解决方案14】：

$abc = [];
foreach(range('A', 'Z') as $first) {
    array_push($abc, $first);
}

foreach(range('A', 'Z') as $second) {
  foreach(range('A', 'Z') as $third) {      
      array_push($abc, $second.$third);
  }
}

$headers = ['CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO', 'CAMPO'];

foreach($headers as $key => $value) {
  echo $abc[$key] . ' - ' . $value . PHP_EOL;
}

【讨论】：

这与this existing answer基本相同。

【解决方案15】：

$alfabet=["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","AA","AB","AC","AD","AE","AF","AG","AH","AI","AJ","AK","AL","AM","AN","AO","AP","AQ","AR","AS","AT","AU","AV","AW","AX","AY","AZ","BA","BB","BC","BD","BE","BF","BG","BH","BI","BJ","BK","BL","BM","BN","BO","BP","BQ","BR","BS","BT","BU","BV","BW","BX","BY","BZ","CA","CB","CC","CD","CE","CF","CG","CH","CI","CJ","CK","CL","CM","CN","CO","CP","CQ","CR","CS","CT","CU","CV","CW","CX","CY","CZ","DA","DB","DD","DD","DE","DF","DG","DH","DI","DJ","DK","DL","DM","DN","DO","DP","DQ","DR","DS","DT","DU","DV","DW","DX","DY","DZ"];

 $active_row_value_fulladdress = "AA - AM";
 //$active_row_value_fulladdress = "A - F";
 $taken_full = strtoupper($active_row_value_fulladdress);

$taken_full_ar = explode("-", $taken_full);
$start = trim($taken_full_ar[0]);
$end   = trim($taken_full_ar[1]);

$alfabet_key = array_flip($alfabet);
$start1 = $alfabet_key[$start];
$end1   = $alfabet_key[$end];

for($i=$start1;$i<=$end1;$i++)
{
    $taken_full_array[]=$alfabet[$i];
}

foreach ($taken_full_array as $key => $value) 
{
    $full_add[]=array_search($value,$alfabet);
}

echo "<pre>";
print_r($taken_full_array);
print_r($full_add);

【讨论】：