按特定值排序多维数组（使用asort和rasort）

Question

我意识到还有其他几个与此有关的问题 - 但它们对我来说都没有意义，或者根本无法工作。

我有一个数组，通过使用asort()和arsort()，可以按字母顺序排列第一个值。我多维数组的一个例子可能是：

[{"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}] 

随着使用asort()和arsort()它是由"Name"字母顺序排序或反向字母。现在我需要相同的功能，仅基于"dealType"。

我已经尝试了几个已经发布在Stackoverflow上的例子，但我必须误解他们，因为他们不工作。我该如何做到这一点？

编辑 乔纳森给出的字母排序正确的答案，有轻微的修改：

//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'); 

和下面这段代码反向字母排序：

//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

您应该使用usort这将允许您使用自定义功能进行比较，以确定排序时价值是第一位的。

类似：

<?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>'; 
?> 

将在dealType第一，然后Name秒排序如果dealType是一样的。如果您想要反向排序，则可以在调用strcasecmp()时调换$a和$b的顺序。

编辑：这个数据可能是从数据库中提取的。如果是这样，那么只需ORDER BY的列。你可以这样做：SELECT * FROM table ORDER BY dealType ASC,Name ASC

Edit2：更新了代码，不使用匿名函数。你也可以查看代码在ideone

Answer 2

我相信你正在寻找对于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); 
?> 

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

Answer 3

工作如果我正确理解你的问题，你有阵列（说）阵列（比如BS），并且希望通过他们一定的参考价值烧烤排序。如果这是正确的，我以前有同样的问题，并制定了自定义函数称为line_sort。 如果你愿意，你可以通过例如使用它：

$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); 

第一个值是要排序键，第二个是数组进行，这里整理的功能代码（对不起它不是英文） ：

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; 
} 

如果你想看到的输出示例的此功能，看看这个：http://test.hanzlsoft.eu/