PHP数组操作

Question

我有此数组：

Array 
    (
     0 => "3_some val", 
     1 => "1_some other val", 
     2 => "0_val",   
     3 => "2_value", 
     4 => "4_other value" 
    ) 

考虑上述阵列，有没有办法从一个这样的数组做什么？

Array 
    (
     0 => "val", 
     1 => "some other val", 
     2 => "value",   
     3 => "some val", 
     4 => "other value" 
    ) 

竟强制将先于强调(_)是新创建的阵列中的关键数字。感谢

Answer 1

这应做到：

$arr1 = array (
    0 => "3_some val", 
    1 => "1_some other val", 
    2 => "0_val",   
    3 => "2_value", 
    4 => "4_other value" 
); 

$result = array(); 

foreach($arr1 as $val) { 
    list($key, $value) = explode('_', $val, 2); 
    $result[$key] = $value; 
} 

// Sort by keys 
ksort($result); 

做print_r($result)会打印出：

Array 
(
    [0] => val 
    [1] => some other val 
    [2] => value 
    [3] => some val 
    [4] => other value 
)