排序數據

Question

我有一個這樣的數組：

$B = array(
    array("firstnam" =>"A", "lastname"=>"D", "grade" => "k1", "score" => 50), 
    array("firstnam" =>"B", "lastname"=>"C", "grade" => "k4", "score" => 20), 
    array("firstnam" =>"C", "lastname"=>"B", "grade" => "k3", "score" => 10), 
    array("firstnam" =>"D", "lastname"=>"A", "grade" => "k2", "score" => 80) 
); 

Answer 1

如果你想通過H4排序H1-3，試試這個：

array_multisort($h4, SORT_NUMERIC, SORT_ASC, $h3, SORT_NUMERIC, SORT_ASC, $h2, SORT_NUMERIC, SORT_ASC, $h1, SORT_NUMERIC, SORT_ASC); 

如果不是你在找什麼，試着改說你的問題。

Answer 2

public function sortByHeader($columns, $sortOrder=1/* or -1 for desc */) { 
    $this->sort_columns = $columns; 
    $this->sort_order = $sortOrder; 
    uasort($this->data, array($this, "cmp")); 
} 

public function cmp($a, $b) { 
    foreach ($this->sort_columns as $column) { 
     // It's also important to check datatypes if you have string and it in diff columns 
     if ($a[$column] > $b[$column]) { 
      return $this->sort_order; 
     } 
     if ($a[$column] < $b[$column]) { 
      return -$this->sort_order; 
     } 
    } 
    return 0; 
} 

uasort允許使用自定義回調對數據進行排序。看PHP男子作參考