先看一维数据排序的实例asort()函数和ksort()函数
<?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:
<?php $name = array(“Clalei”,”Bill”,”Aala”); sort($name); for($i=0;$i<3;$i++){ echo $name[$i]; } echo “ ”; $price = array(100,50,10); sort($price); for($i=0;$i<3;$i++){ echo="">
好了现在来看看二维数据库教程排序实例代码
$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); $data[] = array(‘volume’ => 67, ‘edition’ => 7);
本例中将把 volume 降序排列,把 edition 升序排列。
现在有了包含有行的数组,但是 array_multisort() 需要一个包含列的数组,因此用以下代码来取得列,然后排序。
// 取得列的列表 foreach ($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。
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
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); ?>