如何按子数组对数组进行分组并重新分配PHP中的键

Question

我查看了所有类似的问题和示例（有很多），但仍无法使其工作（尽管我认为我很接近） 。

我有一个文本文件拉到员工安排的数组...

自定：

 

    123,Joe,20120208,0845,1645 
    123,Joe,20120209,0800,1600 
    456,Sue,20120208,0900,1700 
    456,Sue,20120209,0700,1500 
    ... 

我的代码来生成数组：

 

    $schedule = file_get_contents('./schedule.txt'); 
    $s = explode("\n", $schedule); 
    for ($i = 0; $i < count($s); $i++) { 
     $s[$i] = explode(",", $s[$i]); 
    } 
    print_r($s); 

输出是：

 

    Array 
    (
     [0] => Array 
      (
       [0] => 123 
       [1] => Joe 
       [2] => 20120208 
       [3] => 0845 
       [4] => 1645 
      ) 

     [1] => Array 
      (
       [0] => 123 
       [1] => Joe 
       [2] => 20120209 
       [3] => 0800 
       [4] => 1600 
      ) 

     [2] => Array 
      (
       [0] => 456 
       [1] => Sue 
       [2] => 20120208 
       [3] => 0900 
       [4] => 1700 
      ) 

     [3] => Array 
      (
       [0] => 456 
       [1] => Sue 
       [2] => 20120209 
       [3] => 0700 
       [4] => 1500 
      ) 
    ) 

我不是设法集团员工凭身份证在一个新的多维阵列的输出是这样的：

 

    Array 
    (
     [123] => Array 
      (
       [0] => Array 
        (
         [0] => Joe 
         [1] => 20120208 
         [2] => 0845 
         [3] => 1645 
        ) 

       [1] => Array 
        (
         [0] => Joe 
         [1] => 20120209 
         [2] => 0800 
         [3] => 1600 
        ) 
      ) 

     [456] => Array 
      (
       [0] => Array 
        (
         [0] => Sue 
         [1] => 20120208 
         [2] => 0900 
         [3] => 1700 
        ) 

       [1] => Array 
        (
         [0] => Sue 
         [1] => 20120209 
         [2] => 0700 
         [3] => 1500 
        ) 
      ) 
    ) 

我不能为我的生命换我围绕着如何改变我现有的阵列到这个新头（不同的）输出... 我想这一点，但还是一无所获：

 

    $newArr = array(); 

    foreach($s as $k => $v) { 
     if(!isset($newArr[$v[0]])) { 
      $newArr[$v[0]] = array(); 
     } 

     $newArr[$v[0]][] = array($v[0]); 
    } 

虽然我的输出现在是：

 

    Array 
    (
     [123] => Array 
      (
       [0] => Array 
        (
         [0] => 123 
        ) 

       [1] => Array 
        (
         [0] => 123 
        ) 
      ) 

     [456] => Array 
      (
       [0] => Array 
        (
         [0] => 456 
        ) 

       [1] => Array 
        (
         [0] => 456 
        ) 
      ) 
    ) 

有什么想法？我知道我失去了一些东西在我的周围行代码：

 

    $newArr[$v[0]][] = array($v[0]); 

我试图将其更改为：

 

    $newArr[$v[0]][] = array(0 => $v[1], 1 => $v[2], 2 => $v[3], 3 => $v[4]); 

这给我正确的输出，但我现在得到了一个未定义的偏移误差。另外，如果钥匙在子阵列更改的数量，这个代码现在仅限于4我明确地进入...

Answer 1

这应该是足够了，如果我理解你的权利:)

$lines = file('./schedule.txt'); 

$employees = array(); 
foreach ($lines as $line) 
{ 
    $chunks = explode(',', $line); 
    $employees[$chunks[0]][] = array_slice($chunks, 1); 
} 

print_r($employees); 

Answer 2

<?php 
//read the file into an array with each line being an entry 
$schedule = file('./schedule.txt'); 
//empty array 
$s = array(); 
//loop through file lines 
foreach($schedule as $row){ 
    //explode on comma 
    $row = explode(",", trim($row)); 
    //if the id doesn't exist yet... 
    if(!isset($s[$row[0]])){ 
     //...make it an empty array 
     $s[$row[0]] = array(); 
    } 
    //add the row under the id 
    $s[$row[0]][] = $row; 
} 
print_r($s); 
?> 

Answer 3

您可以使用fscanf：

$handle = fopen('./schedule.txt', 'r'); 
$employees = array(); 
while ($line = fscanf($handle, '%d,%s')) { 
    $employees[$line[0]][] = explode(',', $line[1]); 
} 
fclose($handle); 

print_r($employees); 

Answer 4

有一个叫fgetcsv轻松地抓取逗号分隔值的功能。不需要自己做。

此代码还可以解决你的问题，妥善处理空行：

if (($handle = fopen("schedules.csv", "r")) !== FALSE) { 

    $schedules = array(); 
    while (($data = fgetcsv($handle)) !== FALSE) { 
     if ($data[0] !== null) { //blank lines return an array containing null 
      $schedules[$data[0]][] = array_slice($data, 1); 
     } 
    } 
    fclose($handle); 

    //do what you need to 

} else { 
    // file failed to open 
} 

注意，我指定的文件.csv而不是.txt。我建议您将以逗号分隔的值保存为.csv文件。也许甚至可以定义文件中的每一列。