如何使用array_multisort（）爲特定鍵排序多維數組？

我有僱員數據存儲在一個多維數組。現在我想通過array_multisort()函數對數據進行排序，但我希望通過排序獲得不同的結果。我想根據名稱或日期或數值進行排序。下面是其中有多維數組的代碼：如何使用array_multisort（）爲特定鍵排序多維數組？

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>ABC Company</title> 
<style> 
a 
{ 
    text-decoration:none; color:#000; 
} 
</style> 
</head> 

<body> 
    <div style="width:900px; height:500px; margin:auto; border:1px solid; text-align:center;"> 
     <h1><strong>ABC-Company</strong></h1> 
     <h2>Employees:</h2> 
     <table width="100%" border="7"> 
      <tr style="font-size:20px; font-weight:bold;"> 
       <td> 
       <a href="#">Name</a> 
       </td> 
       <td> 
       <a href="#">Gender</a> 
       </td> 
       <td> 
       <a href="#">DOB</a> 
       </td> 
       <td> 
       <a href="#">Position</a> 
       </td> 
       <td> 
       <a href="#">Start Date</a> 
       </td> 
       <td> 
       <a href="#">Gross Salary</a> 
       </td> 
       <td> 
       <a href="#">Tax</a> 
       </td> 
       <td> 
       <a href="#">Pension</a> 
       </td> 
       <td> 
       <a href="#">Net Salary</a> 
       </td> 
      </tr> 
      <?php 
      /*****GROSS SALARY***** 
      Creates an array containing the gross salary data for all the employees*/ 
      $salaries =array(635000.00, 420000.00, 260000.00, 350000.00, 250000.00, 90000.00); 

      /*****TAXATION***** 
      /* Creates if statements that runs trough the salaries and deducts tax rate accordingly for each employee*/ 

      /* Aron and taxes*/ 
      if ($salaries[0] >= 500000) 
      {$tax1=0.45;} 
      if ($salaries[0] >= 300000 and $salaries[0] < 500000) 
      {$tax1=0.35;} 
      if ($salaries[0] >= 200000 and $salaries[0] < 300000) 
      {$tax1=0.2;} 
      if ($salaries[0] >= 100000 and $salaries[0] < 200000) 
      {$tax1=0.1;} 
      if ($salaries[0] < 100000) 
      {$tax1=0;} 

      /* Britney and taxes*/ 
      if ($salaries[1] >= 500000) 
      {$tax2=0.45;} 
      if ($salaries[1] >= 300000 and $salaries[1] < 500000) 
      {$tax2=0.35;} 
      if ($salaries[1] >= 200000 and $salaries[1] < 300000) 
      {$tax2=0.2;} 
      if ($salaries[1] >= 100000 and $salaries[1] < 200000) 
      {$tax2=0.1;} 
      if ($salaries[1] < 100000) 
      {$tax2=0;} 

      /* Daniel and taxes*/ 
      if ($salaries[2] >= 500000) 
      {$tax3=0.45;} 
      if ($salaries[2] >= 300000 and $salaries[2] < 500000) 
      {$tax3=0.35;} 
      if ($salaries[2] >= 200000 and $salaries[2] < 300000) 
      {$tax3=0.2;} 
      if ($salaries[2] >= 100000 and $salaries[2] < 200000) 
      {$tax3=0.1;} 
      if ($salaries[2] < 100000) 
      {$tax3=0;} 

      /* Jessica and taxes*/ 
      if ($salaries[3] >= 500000) 
      {$tax4=0.45;} 
      if ($salaries[3] >= 300000 and $salaries[3] < 500000) 
      {$tax4=0.35;} 
      if ($salaries[3] >= 200000 and $salaries[3] < 300000) 
      {$tax4=0.2;} 
      if ($salaries[3] >= 100000 and $salaries[3] < 200000) 
      {$tax4=0.1;} 
      if ($salaries[3] < 100000) 
      {$tax4=0;} 

      /* Peter and taxes*/ 
      if ($salaries[4] >= 500000) 
      {$tax5=0.45; } 
      if ($salaries[4] >= 300000 and $salaries[4] < 500000) 
      {$tax5=0.35; } 
      if ($salaries[4] >= 200000 and $salaries[4] < 300000) 
      {$tax5=0.2; } 
      if ($salaries[4] >= 100000 and $salaries[4] < 200000) 
      {$tax5=0.1; } 
      if ($salaries[4] < 100000) 
      {$tax5=0; } 

      /* Keith and taxes*/ 
      if ($salaries[5] >= 500000) 
      {$tax6=0.45;} 
      if ($salaries[5] >= 300000 and $salaries[5] < 500000) 
      {$tax6=0.35;} 
      if ($salaries[5] >= 200000 and $salaries[5] < 300000) 
      {$tax6=0.2;} 
      if ($salaries[5] >= 100000 and $salaries[5] < 200000) 
      {$tax6=0.1;} 
      if ($salaries[5] < 100000) 
      {$tax6=0;} 

      /*****PENSION***** 
      Creates the variabel to deduct pension*/ 
      $pension = 0.025; 

      /*****ABC ARRAY***** 
      /*Sorts all the employees in a multiarray with their information. 
      It also does the tax-pension-salary*/ 

      $abc = array(
       'e_1'=>array('Aron','M','1930/01/25','Manager','1998/01/01',number_format($salaries[0],2,".",","),number_format($salaries[0]*$tax1,2,".",","),number_format($salaries[0]*$pension,2,".",","),number_format($salaries[0]-$salaries[0]*$pension-$salaries[0]*$tax1,2,".",",")), 
       'e_2'=>array('Britney','F','2001/05/06','Researcher','2001/03/15',number_format($salaries[1],2,".",","),number_format($salaries[1]*$tax2,2,".",","),number_format($salaries[1]*$pension,2,".",","),number_format($salaries[1]-$salaries[1]*$pension-$salaries[1]*$tax2,2,".",",")), 
       'e_3'=>array('Daniel','M','2003/01/15','Officer','2003/12/06',number_format($salaries[2],2,".",","),number_format($salaries[2]*$tax3,2,".",","),number_format($salaries[2]*$pension,2,".",","),number_format($salaries[2]-$salaries[2]*$pension-$salaries[2]*$tax3,2,".",",")), 
       'e_4'=>array('Jessica','F','2002/11/21','Officer','2007/02/20',number_format($salaries[3],2,".",","),number_format($salaries[3]*$tax4,2,".",","),number_format($salaries[3]*$pension,2,".",","),number_format($salaries[3]-$salaries[3]*$pension-$salaries[3]*$tax4,2,".",",")), 
       'e_5'=>array('Peter','M','1998/01/07','Assisant','2009/09/06',number_format($salaries[4],2,".",","),number_format($salaries[4]*$tax5,2,".",","),number_format($salaries[4]*$pension,2,".",","),number_format($salaries[4]-$salaries[4]*$pension-$salaries[4]*$tax5,2,".",",")), 
       'e_6'=>array('Keith','M','2003/07/25','Intern','2012/06/27',number_format($salaries[5],2,".",","),number_format($salaries[5]*$tax6,2,".",","),number_format($salaries[5]*$pension,2,".",","),number_format($salaries[5]-$salaries[5]*$pension-$salaries[5]*$tax6,2,".",","))); 

      foreach($abc as &$abct) 
      { 
      ?> 
      <tr> 
       <td align="left"> 
       <?php echo ($abct[0]);?> 
       </td> 
       <td> 
       <?php echo ($abct[1]);?> 
       </td> 
       <td> 
       <?php echo ($abct[2]);?> 
       </td> 
       <td align="left"> 
       <?php echo ($abct[3]);?> 
       </td> 
       <td> 
       <?php echo ($abct[4]);?> 
       </td> 
       <td align="right"> 
       <?php echo ($abct[5]);?> 
       </td> 
       <td align="right"> 
       <?php echo ($abct[6]);?> 
       </td> 
       <td align="right"> 
       <?php echo ($abct[7]);?> 
       </td> 
       <td align="right"> 
       <?php echo ($abct[8]);?> 
       </td> 
      </tr> 
      <?php 
       } 
      ?> 
     </table> 
    </div> 
</body> 
</html>

來源

2013-10-04 Akmal

http://php.net/usort查看這些示例。如果你可以清楚地說明你的排序要求，你可以使用usort（） –

這將是更好的，如果你會給我的陣列示例更好 @MikeB – Akmal

@Akmal爲什麼你不看手冊，併爲自己嘗試 –

你不妨改變你的$ ABC陣列，使每個子陣列也是一個關聯數組，使得可用於密鑰排序被指定爲字符串這是更容易有意義的數字索引，如在該簡單的數據實例如下：

$abc = array( 'rec_1' => array('fn'=>'Aron','ln'=>'Michaelson'), 
       'rec_2' => array('fn'=>'Abbey','ln'=>'Drake'), 
       'rec_3' => array('fn'=>'Alice','ln'=>'Peterson'));

$ ABC因此一個關聯數組，其子陣列有鍵，很容易允許數據是按姓氏（'fn'）或姓氏（'ln'）排序。

一種優雅的方式進行排序，例如，通過名字，是使用一個封閉件，具體如下：

function build_sorter($key) { 
    return function ($a, $b) use ($key) { 
     return strnatcmp($a[$key], $b[$key]); 
    }; 
} 

usort($abc, build_sorter('ln'));

build_sorter需要一個密鑰作爲參數，並且參數將是爲封閉件的約束變量那該函數返回。 usort將使用那個閉包，它表示一個比較函數，它的返回值是一個整數，指示被比較的值是相同還是一個大於另一個。

foreach ($abc as $item) { 
    echo strtoupper($item['ln']) . ', ' . $item['fn'] . "\n"; 
} 

// output: 

DRAKE, Abbey 
MICHAELSON, Aron 
PETERSON, Alice

如果由於某種原因，你想用的功能與名稱，你也可以實現使用這種代碼相同的結果：

的結果可以通過下面的代碼來獲得

function SortByLname($a,$b) { 
    return strnatcmp($a['ln'], $b['ln']); 
} 
usort($abc, "SortByLname"); 


foreach ($abc as $item) { 
    echo strtoupper($item['ln']) . ', ' . $item['fn'] . "\n"; 
}

注意：strnatcmp有助於處理可能包含數值字符串的數據，並且這種比較將更符合我們對人類訂購這些值的方式的自然期望。您可以在http://3v4l.org/fng8h以及http://3v4l.org/QYt9S

來源

2014-12-24 11:10:05 slevy1

如何使用array_multisort（）爲特定鍵排序多維數組？

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