從陣列鍵php

Question

得到最大的麻煩我有這些數組，我需要做的是讓單獨的每個數組檢查[total]，然後得到bigest 5數字。我一直在嘗試，但我的頭即將爆炸，請幫助！

Array ( 
[0] => Array ([id] => 50 [faceid] => 1508653983 [fname] => Mario [lname] => Zelaya [email] => Email [handicap] => Handicap [province] => Province [country] => Country [gender] => male [hand] => [shot1] => Shot #1 [shot2] => Shot #2 [shot3] => Shot #3 [shot4] => Shot #4 [shot5] => Shot #5 [news] => 1 [total] => 0) 

[1] => Array ([id] => 49 [faceid] => 1665349411 [fname] => Yair [lname] => Villar [email] => servidorv@gmail.com [handicap] => lefthanded [province] => Buenos Aires [country] => Argentina [gender] => male [hand] => RH [shot1] => 200 [shot2] => 98 [shot3] => 98 [shot4] => 98 [shot5] => 98 [news] => 1 [total] => 592) 

[2] => Array ([id] => 48 [faceid] => 1665349411 [fname] => Yair [lname] => Villar [email] => servidorv@gmail.com [handicap] => lefthanded [province] => Buenos Aires [country] => Argentina [gender] => male [hand] => RH [shot1] => 500 [shot2] => 250 [shot3] => 80 [shot4] => 30 [shot5] => 20 [news] => 1 [total] => 88000) 

) 

我該怎麼做這些與PHP。請幫忙！！

Answer 1

function getTop5(array $data, $high2low = true) 
{ 
    $total = array(); 

    foreach ($data as $val) 
     $total[$val["id"]] = $val["total"]; 

    asort($total); 
    return $high2low ? array_reverse($total) : $total; 
} 

$data = array(
     array("id" => 1, "total" => 25), 
     array("id" => 2, "total" => 32), 
     array("id" => 3, "total" => 21), 
     array("id" => 4, "total" => 28) 
     ); 

print_r(getTop5($data)); 

Answer 2

嘗試使用PHP的usort函數來排序您的數組：

function cmp($a, $b) 
{ 
    if ($a['total'] == $b['total']) 
     return 0; 

    return ($a['total'] > $b['total']) ? -1 : 1; 
} 

usort($yourarray, "cmp"); 

if (count($yourarray) > 5) 
    $sortedArray = array_slice($yourarray, 0, 5); 
else 
    $sortedArray = $yourarray; 

你最終將與得分最高的5個元素的數組。如果輸入數組中的元素少於5個，則最終將獲得與輸入數組中元素數量相同的元素。