[英]Sorting PHP array using subkey-values
I have an array that looks something like this:我有一个看起来像这样的数组:
Array ( [Erik] => Array ( [count] => 10 [changes] => 1 ) [Morten] => Array ( [count] => 8 [changes] => 1 ) )
Now, the keys in the array are names of technicians in our Helpdesk-system.现在,数组中的键是我们帮助台系统中技术人员的姓名。 I'm trying to sort this based on number of
[count]
plus [changes]
and then show them.我正在尝试根据
[count]
加上[changes]
的数量对其进行排序,然后显示它们。 I've tried to use usort , but then the array keys are replaced by index numbers.我尝试使用usort ,但随后数组键被索引号替换。 How can I sort this and keep the array keys?
如何对此进行排序并保留数组键?
Try using uasort():尝试使用 uasort():
<?
function cmp($a, $b)
{
return ($b['count'] + $b['changes']) - ($a['count'] + $a['changes']);
}
$arr = array(
'John' => array('count' => 10, 'changes' => 1),
'Martin' => array('count' => 5, 'changes' => 5),
'Bob' => array('count' => 15, 'changes' => 5),
);
uasort($arr, "cmp");
print_r($arr);
?>
prints:印刷:
Array
(
[Bob] => Array
(
[count] => 15
[changes] => 5
)
[John] => Array
(
[count] => 10
[changes] => 1
)
[Martin] => Array
(
[count] => 5
[changes] => 5
)
)
You should use uasort
for this.您应该为此使用
uasort
。
bool uasort ( array &$array, callback $cmp_function )
bool uasort ( 数组 &$array, 回调 $cmp_function )
This function sorts an array such that array indices maintain their correlation with the array elements they are associated with, using a user-defined comparison function.
此 function 使用用户定义的比较 function 对数组进行排序,以便数组索引与其关联的数组元素保持相关性。 This is used mainly when sorting associative arrays where the actual element order is significant.
这主要用于对实际元素顺序很重要的关联 arrays 进行排序时使用。
This should do what you need:这应该做你需要的:
uasort($array, create_function('$a, $b', 'return (array_sum($a) - array_sum($b));'));
That sorts an array using the array_sum()
function, and maintaining keys.使用
array_sum()
function 对数组进行排序,并维护键。
Use this.i thin it works使用这个。我觉得它有效
function cmp($a, $b)
{
if ($a['count'] == $b['count']) {
return 0;
}
return ($a['count'] > $b['count']) ? +1 : -1;
}
usort ( $array, 'cmp' );
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