PHP二维数组排序问题详解(数组键值排序)
根据某个键值对二维数组进行排序是个常见问题,这里总结一个函数,可同时对两个键值分别排序,当然想要更多的话就自行解决吧.
但是如果需要排序的数组是一个二维数组,需要按照数组的键值排序,如下面这个二维数组,需要按照sort键名来排序,那么array_multisort() 就无法直接实现了.
实例一,代码如下:
$arr = array (
array (
'sort' => 3,
'a' => 'a' ,
'b' => 'b'
),
array (
'sort' => 5,
'a' => 'a' ,
'b' => 'b'
),
array (
'sort' => 1,
'a' => 'a' ,
'b' => 'b'
)
);这样array_multisort()不不能生效了,我们可以对函数进行升级一下,根据指定键值进行排序,代码如下:
function array_sort( $arr , $key1 , $sort1 = 'asc' , $key2 = '' , $sort2 = 'asc' ){
if (! is_array ( $arr )){
return $arr ;
}
foreach ( $arr AS $key => $row ){
$temp [ $key ] = $row [ $key1 ];
}
$sort1 = $sort1 == 'asc' ? SORT_ASC : SORT_DESC;
if (! $key2 ){
array_multisort ( $temp , $sort1 , $arr );
} else {
foreach ( $arr AS $key => $row ){
$temp2 [ $key ] = $row [ $key2 ];
}
$sort2 = $sort2 == 'asc' ? SORT_ASC : SORT_DESC;
array_multisort ( $temp , $sort1 , $temp2 , $sort2 , $arr );
}
return $arr ;
}实例二,代码如下:
function array_sort( $arr , $keys , $type = 'asc' ){
$keysvalue = $new_array = array ();
foreach ( $arr as $k => $v ){
$keysvalue [ $k ] = $v [ $keys ];
}
if ( $type == 'asc' ){
asort( $keysvalue );
} else {
arsort( $keysvalue );
}
reset( $keysvalue );
foreach ( $keysvalue as $k => $v ){
$new_array [ $k ] = $arr [ $k ];
}
return $new_array ;
}
$array = array (
array ( 'name' => '手机' , 'brand' => '诺基亚' , 'price' =>1050),
array ( 'name' => '笔记本电脑' , 'brand' => 'lenovo' , 'price' =>4300),
array ( 'name' => '剃须刀' , 'brand' => '飞利浦' , 'price' =>3100),
array ( 'name' => '跑步机' , 'brand' => '三和松石' , 'price' =>4900),
array ( 'name' => '手表' , 'brand' => '卡西欧' , 'price' =>960),
array ( 'name' => '液晶电视' , 'brand' => '索尼' , 'price' =>6299),
array ( 'name' => '激光打印机' , 'brand' => '惠普' , 'price' =>1200)
);
$ShoppingList = array_sort( $array , 'price' );
print_r( $ShoppingList );面是对$array这个二维数组按照'price'从低到高的排序.
