php 二维数组排序
用到二维数组排序，到手册里面查了下，有这样一个很不错的函数，和数据库里面的order by功能是一样的，把二位数组当成一个数据库的表。数组的key就相当于标的列，数组的value相当于标的行：
$XML_deed_temp=array(
array(’deed_id’=>1,’total’=>’b101′),
array(’deed_id’=>2,’total’=>’3′),
array(’deed_id’=>2,’total’=>’4′),
array(’deed_id’=>5,’total’=>’a5′),
array(’deed_id’=>8,’total’=>’a8′),
array(’deed_id’=>12,’total’=>’a12′),
array(’deed_id’=>11,’total’=>’a11′),
array(’deed_id’=>6,’total’=>’a6′)
);
上面的数组可以看成如下一个数据库表:
deed_id total
—————————-
1 b101
2 3
2 4
5 a5
8 a8
12 a12
11 a11
6 a6
——————————-
排序的时候先要取出其中的一列，然后就可以这样：
array_multisort($sortdeed,, SORT_ASC, $XML_deed_temp);
$XML_deed_temp就是要排序的数组，$sortdeed,就是要排序的列的数组(这个数组要先foreach $XML_deed_temp然后将deed_id那一列取出放到$sortdeed数组里面)，如果要实现order by col1,col2这样的，可以把多个列取出进行排序，排序先按col1排，再按col2排
$XML_deed_temp=array(
array(‘deed_id‘=>1,‘total‘=>‘b101‘),
array(‘deed_id‘=>2,‘total‘=>‘3‘),
array(‘deed_id‘=>2,‘total‘=>‘4‘),
array(‘deed_id‘=>5,‘total‘=>‘a5‘),
array(‘deed_id‘=>8,‘total‘=>‘a8‘),
array(‘deed_id‘=>12,‘total‘=>‘a12‘),
array(‘deed_id‘=>11,‘total‘=>‘a11‘),
array(‘deed_id‘=>6,‘total‘=>‘a6‘)
);
foreach($XML_deed_temp as $t_k=>$t_v){
$deed_id[]=$t_v['deed_id'];
$total[]=$t_v['total'];
//print_r($t_v);
}
array_multisort($deed_id, SORT_ASC, $total, SORT_ASC, $XML_deed_temp);
print_r($XML_deed_temp);
array(‘deed_id‘=>1,‘total‘=>‘b101‘),
array(‘deed_id‘=>2,‘total‘=>‘3‘),
array(‘deed_id‘=>2,‘total‘=>‘4‘),
array(‘deed_id‘=>5,‘total‘=>‘a5‘),
array(‘deed_id‘=>8,‘total‘=>‘a8‘),
array(‘deed_id‘=>12,‘total‘=>‘a12‘),
array(‘deed_id‘=>11,‘total‘=>‘a11‘),
array(‘deed_id‘=>6,‘total‘=>‘a6‘)
);
foreach($XML_deed_temp as $t_k=>$t_v){
$deed_id[]=$t_v['deed_id'];
$total[]=$t_v['total'];
//print_r($t_v);
}
array_multisort($deed_id, SORT_ASC, $total, SORT_ASC, $XML_deed_temp);
print_r($XML_deed_temp);
本文URL:http://blog.diybeta.com/?p=148
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