PHP - 關聯數組

Question

上multisort考慮以下關聯數組：

$arrEmployees['marco polo'] = array(age => 40, service => 5); 
$arrEmployees['jane austen'] = array(age => 30, service => 9); 
$arrEmployees['carl marx'] = array(age => 30, service => 7); 

怎麼用在array_multisort按年齡遞減和服務ASC訂購？例3中php.net似乎只與數字索引工作...

Answer 1

$arrEmployees['marco polo'] = array(age => 40, service => 5); 
$arrEmployees['jane austen'] = array(age => 30, service => 9); 
$arrEmployees['carl marx'] = array(age => 30, service => 7); 

foreach ($arrEmployees as $key => $row) { 
    $age[$key] = $row['age']; 
    $service[$key] = $row['service']; 
} 

array_multisort($age, SORT_DESC, $service, SORT_ASC, $arrEmployees); 

var_dump($arrEmployees); 

給

array(3) { 
    ["marco polo"]=> 
    array(2) { 
    ["age"]=> 
    int(40) 
    ["service"]=> 
    int(5) 
    } 
    ["carl marx"]=> 
    array(2) { 
    ["age"]=> 
    int(30) 
    ["service"]=> 
    int(7) 
    } 
    ["jane austen"]=> 
    array(2) { 
    ["age"]=> 
    int(30) 
    ["service"]=> 
    int(9) 
    } 
} 

這是正確的，並且所有關聯指標仍然完好​​無損