复制代码 代码如下:

$arr=array (
\'1\' => array ( \'date\' => \'2011-08-18\', \'num\' => 5 ) ,
\'2\' => array ( \'date\' => \'2011-08-20\', \'num\' => 3 ) ,
\'3\' => array ( \'date\' => \'2011-08-17\', \'num\' => 10 )
 )  ; $result = sysSortArray($arr,\'num\');这样运行之后的效果为：
$arr=array (
\'1\' => array ( \'date\' => \'2011-08-18\', \'num\' => 3 ) ,
\'2\' => array ( \'date\' => \'2011-08-20\', \'num\' => 5 ) ,
\'3\' => array ( \'date\' => \'2011-08-17\', \'num\' => 10 )
 )  ;用到的函数：
/**
 * Sort an two-dimension array by some level two items use array_multisort() function.
 *
 * sysSortArray($Array,\"Key1\",\"SORT_ASC\",\"SORT_RETULAR\",\"Key2\";……)
 * @author                      lamp100
 * @param  array   $ArrayData   the array to sort.
 * @param  string  $KeyName1    the first item to sort by.
 * @param  string  $SortOrder1  the order to sort by(\"SORT_ASC\"|\"SORT_DESC\")
 * @param  string  $SortType1   the sort type(\"SORT_REGULAR\"|\"SORT_NUMERIC\"|\"SORT_STRING\")
 * @return array                sorted array.
 */
function sysSortArray($ArrayData,$KeyName1,$SortOrder1 = \"SORT_ASC\",$SortType1 = \"SORT_REGULAR\")
{
    if(!is_array($ArrayData))
    {
        return $ArrayData;
    }
    // Get args number.
    $ArgCount = func_num_args();
    // Get keys to sort by and put them to SortRule array.
    for($I = 1;$I < $ArgCount;$I ++)
    {
        $Arg = func_get_arg($I);
        if(!eregi(\"SORT\",$Arg))
        {
            $KeyNameList[] = $Arg;
            $SortRule[]    = \'$\'.$Arg;
        }
        else
        {
            $SortRule[]    = $Arg;
        }
    }
    // Get the values according to the keys and put them to array.
    foreach($ArrayData AS $Key => $Info)
    {
        foreach($KeyNameList AS $KeyName)
        {
            ${$KeyName}[$Key] = $Info[$KeyName];
        }
    }
    // Create the eval string and eval it.
    $EvalString = \'array_multisort(\'.join(\",\",$SortRule).\',$ArrayData);\';
    eval ($EvalString);
    return $ArrayData;
}

复制代码 代码如下:

<?php

 $arr = \'\';

 echo \'二维数组如下：\'.\'<br / >\';
 for($i=0; $i<=5; $i++)
 {
  $arr[$i][\'val\'] = mt_rand(1, 100);
  $arr[$i][\'num\'] = mt_rand(1, 100);
 }

 echo \'<pre>\';
 print_r($arr);
 echo \'</pre>\';

 echo \'从二维数组中抽出键为val，单独成另一个数组：\'.\'<br / >\';
 foreach ($arr as $key => $row)
 {
     $vals[$key] = $row[\'val\'];
        $nums[$key] = $row[\'num\'];
 }

 echo \'<pre>\';
 print_r($vals);
 echo \'</pre>\';

 echo \'对其进行排序：\'.\'<br / >\';
 array_multisort($vals, SORT_ASC, $arr);

 echo \'<pre>\';
 print_r($vals);
 echo \'</pre>\';

?>