我怎么能按数组的值排序数组

Question

我在下面给出了数组，我希望按级别值1到4对该数组进行排序。

表格：

Array ( [20] => Array ( [sid] => 1020 [L] => 1027 [R] => 1033 [Level] => 1 ) 
    [27] => Array ( [sid] => 1027 [L] => 1030 [R] => 1073 [Level] => 2 )
    [30] => Array ( [sid] => 1030 [L] => 1074 [R] => [Level] => 3 ) 
    [74] => Array ( [sid] => 1074 [L] => [R] => [Level] => 4 ) 
    [73] => Array ( [sid] => 1073 [L] => [R] => [Level] => 3 ) 
    [33] => Array ( [sid] => 1033 [L] => [R] => [Level] => 2 ) )

要

Array ( [20] => Array ( [sid] => 1020 [L] => 1027 [R] => 1033 [Level] => 1 ) 
    [27] => Array ( [sid] => 1027 [L] => 1030 [R] => 1073 [Level] => 2 )
    [33] => Array ( [sid] => 1033 [L] => [R] => [Level] => 2 )
    [30] => Array ( [sid] => 1030 [L] => 1074 [R] => [Level] => 3 ) 
    [73] => Array ( [sid] => 1073 [L] => [R] => [Level] => 3 ) 
    [74] => Array ( [sid] => 1074 [L] => [R] => [Level] => 4 )      
    )

Answer 1

您可以使用array_multisort()

<?php
$array = array(
    array('Level'=>1),
    array('Level'=>2),
    array('Level'=>3),
    array('Level'=>4),
    array('Level'=>3),
    array('Level'=>2)
);

$tmp = array();
foreach($array as $r){
    $tmp[] = $r['Level'];
}

array_multisort($tmp,SORT_ASC,$array);

echo '<pre>',print_r($array),'</pre>';