php 对数组进行排序并保留键的值
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Sort array and keep values of keys
提问by acrmuui
I have an array that looks like this:
我有一个看起来像这样的数组：
Array
(
[team1] => Array
(
[points] => 10
[players] => Array
(
...
)
)
[team2] => Array
(
[points] => 23
[players] => Array
(
...
)
)
... many more teams
)
and I would like to sort the teams by the number of points each team has. I have tried this:
我想按照每支球队的得分对球队进行排序。我试过这个：
function sort_by_points($a,$b)
{
if ($a['points']==$b['points']) return 0;
return ($a['points']<$b['points'])?1:-1;
}
usort($this->wordswithdata, "sortbycount");
But that approach overrides the keys containing the teamnames and returns:
但是这种方法会覆盖包含团队名称的键并返回：
Array
(
[0] => Array
(
[points] => 23
[players] => Array
(
...
)
)
[1] => Array
(
[points] => 10
[players] => Array
(
...
)
)
etc...
)
Is there any way to sort the array without overwriting the teamnames as the array keys?
有没有办法在不覆盖团队名称作为数组键的情况下对数组进行排序？
采纳答案by complex857
回答by Shoe
You can use uasort:
您可以使用uasort：
uasort($array, function($a, $b) {
return $a['points'] - $b['points'];
});
This function sorts an array such that array indices maintain their correlationwith the array elements they are associated with, using a user-defined comparison function.
此函数使用用户定义的比较函数对数组进行排序，以便数组索引保持与其关联的数组元素的相关性。
回答by Aylian Craspa
U can sort an Associative array by its value like this
你可以像这样按其值对关联数组进行排序
$age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
function Ascending($a, $b) {
if ($a == $b) {
return 0;
}
return ($a < $b) ? -1 : 1;
}
function Descending($a, $b) {
if ($a == $b) {
return 0;
}
return ($a > $b) ? -1 : 1;
}
echo "Ascending order" ;
uasort($age,"Ascending");
print_r($age);
echo "</br>Descending order" ;
uasort($age,"Descending");
print_r($age);
回答by Satyendra Singh
its working fine i giving example
that array need sort
$sumarray=array [▼
484 => 54.7875
486 => 53.5375
487 => 52.9125
488 => 52.2875
493 => 54.7875
]
$original=$sumarray;
$svalue=array_values($sumarray);
rsort($svalue);
$sorted=array();
foreach ($svalue as $key => $value) {
$kk=array_search($value,$sumarray);
$sorted[$kk]=$value;
unset($sumarray[$kk]);
}
print_r($original);
print_r($svalue);
print_r($sorted);
//out put
array:5 [▼
484 => 54.7875
486 => 53.5375
487 => 52.9125
488 => 52.2875
493 => 54.7875
]
array:5 [▼
0 => 54.7875
1 => 54.7875
2 => 53.5375
3 => 52.9125
4 => 52.2875
]
array:5 [▼
484 => 54.7875
493 => 54.7875
486 => 53.5375
487 => 52.9125
488 => 52.2875
]
回答by Praveen kalal
Try this code hope it will work.
试试这个代码希望它会起作用。
function aasort (&$array, $key) {
$sorter=array();
$ret=array();
reset($array);
foreach ($array as $ii => $va) {
$sorter[$ii]=$va[$key];
}
asort($sorter);
foreach ($sorter as $ii => $va) {
$ret[$ii]=$array[$ii];
}
$array=$ret;
}
aasort($your_array,"points");
