php一维数组排序与多维数组排序
先看一维数据排序的实例asort()函数和ksort()函数,实例代码如下:
<?php //asort()函数以数组的值升序为准 $mix = array ( "Clalei" =>10, "Bill" =>50, "Aala" =>100); asort( $mix ); print_r( $mix ); //ksort()函数以数组的关键字升序为准 $mix = array ( "Clalei" =>100, "Bill" =>50, "Aala" =>10); ksort( $mix ); print_r( $mix ); ?>一维数据排序二,sort()函数,可将数组按字母或是数字的升序(从低到高)来进行排序,实例代码如下:
<?php $name = array ( "Clalei" , "Bill" , "Aala" ); //开源代码phpfensi测试数据 sort( $name ); for ( $i =0; $i <3; $i ++){ echo $name [ $i ]; } echo "<br />" ; $price = array (100,50,10); sort( $price ); for ( $i =0; $i <3; $i ++){ echo $price [ $i ]. " | " ; } ?>好了现在来看看二维数据库排序实例代码:
$data [] = array ( 'volume' => 67, 'edition' => 2); $data [] = array ( 'volume' => 86, 'edition' => 1); $data [] = array ( 'volume' => 85, 'edition' => 6); $data [] = array ( 'volume' => 98, 'edition' => 2); $data [] = array ( 'volume' => 86, 'edition' => 6); $data [] = array ( 'volume' => 67, 'edition' => 7);本例中将把 volume 降序排列,把 edition 升序排列,现在有了包含有行的数组,但是 array_multisort() 需要一个包含列的数组,因此用以下代码来取得列,然后排序,实例代码如下:
// 取得列的列表 foreach ( $data as $key => $row ) { $volume [ $key ] = $row [ 'volume' ]; $edition [ $key ] = $row [ 'edition' ]; } // 将数据根据 volume 降序排列，根据 edition 升序排列 // 把 $data 作为最后一个参数，以通用键排序 array_multisort ( $volume , SORT_DESC, $edition , SORT_ASC, $data );数据集合现在排好序了,结果如下:
volume | edition -------+-------- 98 | 2 86 | 1 86 | 6 85 | 6 67 | 2 67 | 7二维数组排序三
array_multisort() 对二维数组进行排序,数组$roughData,我们打算按照accurancy排序,代码如下:
Array( [0] => Array ( [username] => 10yl [accuracy] => 0.00 ) [1] => Array ( [username] => 11yl [accuracy] => 1.00 ) [2] => Array ( [username] => 12yl [accuracy] => 0.00 ) [3] => Array ( [username] => 13yl [accuracy] => 1.00 ))方法:
(1):提取accuracy列数组
foreach ($roughData as $key => $row) {
$usernames[$key] = $row['username'];
$accuracy[$key] = $row['accuracy'];
}
(2):进行排序
array_multisort($accuracy, SORT_ASC,$roughData);
当print_r($roughData);后我们将得到一个按accuracy升序排序的二维数组,再来看个简单实例用二维数组排序方法,实例代码如下:
<?php $array [] = array ( "age" =>20, "name" => "li" ); $array [] = array ( "age" =>21, "name" => "ai" ); $array [] = array ( "age" =>20, "name" => "ci" ); $array [] = array ( "age" =>22, "name" => "di" ); foreach ( $array as $key => $value ){ $age [ $key ] = $value [ 'age' ]; $name [ $key ] = $value [ 'name' ]; } array_multisort ( $age ,SORT_NUMERIC,SORT_DESC, $name ,SORT_STRING,SORT_ASC, $array ); print_r( $array ); ?>查看更多关于php一维数组排序与多维数组排序 - php数组的详细内容...
声明：本文来自网络，不代表【好得很程序员自学网】立场，转载请注明出处：http://haodehen.cn/did31244