按特定值排序多維數組（使用asort和rasort）

Question

我意識到還有其他幾個與此有關的問題 - 但它們對我來說都沒有意義，或者根本無法工作。

我有一個數組，通過使用asort()和arsort()，可以按字母順序排列第一個值。我多維數組的一個例子可能是：

[{"Name":"Amber","date":"","dealType":"B-Braun Medical, Inc.","id":"***@***.com","registered":0},{"Name":"Bob","date":"","dealType":"B-Braun Medical, Inc.","id":"***@***.com","registered":0},{"Name":"Hans","date":"","dealType":"B-Braun Medical, Inc.","id":"***@***.com","registered":0},{"Name":"Jeff","date":"","dealType":"B-Braun Medical, Inc.","id":"***@***.com","registered":0},{"Name":"Michael","date":"","dealType":"B-Braun Medical, Inc.","id":"***@***.com","registered":0}] 

隨着使用asort()和arsort()它是由"Name"字母順序排序或反向字母。現在我需要相同的功能，僅基於"dealType"。

我已經嘗試了幾個已經發布在Stackoverflow上的例子，但我必須誤解他們，因爲他們不工作。我該如何做到這一點？

編輯 喬納森給出的字母排序正確的答案，有輕微的修改：

//the custom function to do our sort 
function cmp($a,$b){ 
    //get which string is less or 0 if both are the same 
    $cmp = strcasecmp($a->dealType, $b->dealType); 
    //if the strings are the same, check name 
    return $cmp; 
} 
//sort using a custom function 
usort($obj, 'cmp'); 

和下面這段代碼反向字母排序：

//the custom function to do our sort 
function cmp($a,$b){ 
    //get which string is less or 0 if both are the same 
    $cmp = strcasecmp($b->dealType, $a->dealType); 
    //if the strings are the same, check name 
    return $cmp; 
} 
//sort using a custom function 
usort($obj, 'cmp'); 

Answer 1

您應該使用usort這將允許您使用自定義功能進行比較，以確定排序時價值是第一位的。

類似：

<?php 
//the data you supplied. normally just an array 
$data = array (0 => array ('Name' => 'Amber', 'date' => '', 'dealType' => 'deal1', 'id' => '***@***.com', 'registered' => 0,), 1 => array ('Name' => 'Bob', 'date' => '', 'dealType' => 'deal5', 'id' => '***@***.com', 'registered' => 0,), 2 => array ('Name' => 'Hans', 'date' => '', 'dealType' => 'deal3', 'id' => '***@***.com', 'registered' => 0,), 3 => array ('Name' => 'Jeff', 'date' => '', 'dealType' => 'deal2', 'id' => '***@***.com', 'registered' => 0,), 4 => array ('Name' => 'Michael', 'date' => '', 'dealType' => 'deal1', 'id' => '***@***.com', 'registered' => 0,),); 

//show what we got going into sort 
echo '<pre>'.print_r($data, 1).'</pre>'; 

function cmp($a,$b){ 
    //get which string is less or 0 if both are the same 
    $cmp = strcasecmp($a['dealType'], $b['dealType']); 
    //if the strings are the same, check name 
    if($cmp == 0){ 
     //compare the name 
     $cmp = strcasecmp($a['Name'], $b['Name']); 
    } 
    return $cmp; 
} 
//sort using a custom function 
usort($data, 'cmp'); 

//show what we got after sort 
echo '<pre>'.print_r($data, 1).'</pre>'; 
?> 

將在dealType第一，然後Name秒排序如果dealType是一樣的。如果您想要反向排序，則可以在調用strcasecmp()時調換$a和$b的順序。

編輯：這個數據可能是從數據庫中提取的。如果是這樣，那麼只需ORDER BY的列。你可以這樣做：SELECT * FROM table ORDER BY dealType ASC,Name ASC

Edit2：更新了代碼，不使用匿名函數。你也可以查看代碼在ideone

Answer 2

我相信你正在尋找對於array_multisort()：http://php.net/manual/en/function.array-multisort.php

例如：

<?php 
$ar = array(
     array("10", 11, 100, 100, "a"), 
     array( 1, 2, "2", 3, 1) 
    ); 
array_multisort($ar[0], SORT_ASC, SORT_STRING, 
       $ar[1], SORT_NUMERIC, SORT_DESC); 
var_dump($ar); 
?> 

來源：http://php.net/manual/en/function.array-multisort.php#example-4558

Answer 3

工作如果我正確理解你的問題，你有陣列（說）陣列（比如BS），並且希望通過他們一定的參考價值燒烤排序。如果這是正確的，我以前有同樣的問題，並制定了自定義函數稱爲line_sort。 如果你願意，你可以通過例如使用它：

$array=json_decode('[{"Name":"Amber","date":"","dealType":"B-Braun Medical, Inc.","id":"***@***.com","registered":0},{"Name":"Bob","date":"","dealType":"B-Braun Medical, Inc.","id":"***@***.com","registered":0},{"Name":"Hans","date":"","dealType":"B-Braun Medical, Inc.","id":"***@***.com","registered":0},{"Name":"Jeff","date":"","dealType":"B-Braun Medical, Inc.","id":"***@***.com","registered":0},{"Name":"Michael","date":"","dealType":"B-Braun Medical, Inc.","id":"***@***.com","registered":0}]'); 
$array=line_sort("dealType",$array); 

第一個值是要排序鍵，第二個是數組進行，這裏整理的功能代碼（對不起它不是英文） ：

function line_sort($klic,$hodnoty) 
{ 
    if (!is_array($hodnoty)) 
    { 
    trigger_error("Second parameter has to be multidimensional array", E_USER_WARNING); 
    return; 
    } 
    for ($x=0;$x<count($hodnoty)-1;$x++) 
    { 
    for ($y=count($hodnoty)-1;$y>=$x;$y--) 
    { 
     $radek1=$hodnoty[$y]; 
     $radek2=$hodnoty[$y+1]; 
     if ((isset($radek1[$klic]) && isset($radek2[$klic])) && (intval($radek1[$klic]) > intval($radek2[$klic])) || (isset($radek2[$klic]) && !isset($radek1[$klic]))) 
     { 
     $hodnoty[$y]=$radek2; 
     $hodnoty[$y+1]=$radek1; 
     continue; 
     } 
     else if((isset($radek1[$klic]) && isset($radek2[$klic])) && (intval($radek1[$klic]) == intval($radek2[$klic]))) 
     { 
     if (strcmp($radek1[$klic],$radek2[$klic])>0) 
     { 
      $hodnoty[$y]=$radek2; 
      $hodnoty[$y+1]=$radek1; 
     } 
     } 
    } 
    } 
    return $hodnoty; 
} 

如果你想看到的輸出示例的此功能，看看這個：http://test.hanzlsoft.eu/