Php 排序一个";“内部”;仅按特定键值进行数组-使用uasort()?
PHP非常适合对数组进行排序,但我不知道在出现此问题时使用什么。。看看上面的数组 我想按Php 排序一个";“内部”;仅按特定键值进行数组-使用uasort()?,php,arrays,sorting,Php,Arrays,Sorting,PHP非常适合对数组进行排序,但我不知道在出现此问题时使用什么。。看看上面的数组 我想按perc-键从低到高对innersubcats[]数组进行排序 我希望结果是: Array opareas ( [0] => Array ( [name] = => array('opname1') [subcats] => Array ( [0] => Array ( [amount] => 98
perc
-键从低到高对innersubcats[]
数组进行排序
我希望结果是:
Array opareas
(
[0] => Array
(
[name] = => array('opname1')
[subcats] => Array
(
[0] => Array
(
[amount] => 9883
[perc] => 112.61394712853236
)
[1] => Array
(
[amount] => 1
[perc] => 0.011394712853236098
)
[2] => Array
(
[amount] => 3679
[perc] => 41.921148587055605
)
)
)
[1] => Array
(
[name] = => array('opname2')
[subcats] => Array
(
[0] => Array
(
[amount] => 12166
[perc] => 56.8584380987989
)
[1] => Array
(
[amount] => 1473
[perc] => 6.884142636818245
)
[2] => Array
(
[amount] => 955
[perc] => 4.463242510632331
)
[3] => Array
(
[amount] => 6802
[perc] => 31.789503201383372
)
)
)
我已经试过了:
Array opareas
(
[0] => Array
(
[name] = => array('opname1')
[subcats] => Array
(
[0] => Array
(
[amount] => 1
[perc] => 0.011394712853236098 //Lowest percentage value
)
[1] => Array
(
[amount] => 3679
[perc] => 41.921148587055605
)
[2] => Array
(
[amount] => 9883
[perc] => 112.61394712853236 //Highest percentage value
)
)
)
[1] => Array
(
[name] = => array('opname2');
[subcats] => Array
(
[0] => Array
(
[amount] => 955
[perc] => 4.463242510632331 //Lowest percentage value
)
[1] => Array
(
[amount] => 1473
[perc] => 6.884142636818245
)
[2] => Array
(
[amount] => 12166
[perc] => 56.8584380987989
)
[3] => Array
(
[amount] => 6802
[perc] => 31.789503201383372 //Highest percentage value
)
)
)
class什么意思{
私有函数排序子类perc($a,$b){
如果($a['subcats']['perc']=$b['subcats']['perc']){返回0;}
回报($a['subcats']['perc']<$b['subcats']['perc'])?-1:1;
}
公共功能showthing(){
$opareas=array();//如上所示
//根据perc键将子类别数组从低到高排序
uasort($opareas,array($this,'sort_subcats_perc'));
}
);
}
我不希望实际的opareas[0]
和operas[1]
在数组中切换位置(使用我尝试过的函数时会发生这种情况),我只希望内部数组子类[]根据perc字段/键更改其顺序。使用uasort
是否可以这样做?还是其他内置的PHP优秀排序函数
class whateverArray {
private function sort_subcats_perc($a, $b) {
if ($a['subcats']['perc'] == $b['subcats']['perc'] ) {return 0;}
return ( $a['subcats']['perc'] < $b['subcats']['perc'] ) ? -1 : 1;
}
public function showStuff() {
$opareas = array(); //Given above
//Sort subcat array from low to high based on perc-key
uasort( $opareas, array( $this, 'sort_subcats_perc') );
}
);
}
这可能是解决办法
可以在这里解决。如果要对子数组进行排序,比较函数需要稍微不同。然后,您可以通过引用在外部数组上循环,以便将
子类别
排序到位
$opareas = array(); //Given above
foreach($opareas as &$oparea){
//Sort subcat array from low to high based on perc-key
uasort( $oparea, array( $this, 'sort_subcats_perc') );
}
foreach($opareas as&$value){
usort($value['subcats'),函数($a,$b){
如果($a['perc']>$b['perc'])返回1;
如果($a['perc']<$b['perc'])返回-1;
返回0;
});
}
未设置($value);//循环后取消设置引用
您可以使用
usort
。如果您关心子类别中键的顺序,则只需使用uasort
,如果您要对子数组进行排序,则比较函数需要稍有不同。然后,您可以通过引用在外部数组上循环,以便将子类别
排序到位
$opareas = array(); //Given above
foreach($opareas as &$oparea){
//Sort subcat array from low to high based on perc-key
uasort( $oparea, array( $this, 'sort_subcats_perc') );
}
foreach($opareas as&$value){
usort($value['subcats'),函数($a,$b){
如果($a['perc']>$b['perc'])返回1;
如果($a['perc']<$b['perc'])返回-1;
返回0;
});
}
未设置($value);//循环后取消设置引用
您可以使用usort
。如果您关心子类别中键的顺序,则只需使用uasort
,我无法自行实现此功能。我得到了非法的stringset子类作为警告。这是因为这将uasort
与您的sort\u subcats\u perc
函数一起应用到第二级数组(使用键“name”和“subcats”)而不是最里面的数组。我无法让它单独工作。我得到了非法的stringset子类作为警告。这是因为这将uasort
与您的sort\u subcats\u perc
函数一起应用到第二级数组(使用键“name”和“subcats”)而不是最里面的数组。谢谢!工作得很有魅力!非常感谢。工作得很有魅力!