PHP排序之二维数组的按照字母排序实现代码

<?php
/**
* sort an two-dimension array by some level two items use array_multisort() function.
*
* syssortarray($array,"key1","sort_asc","sort_retular","key2"……)
* @author chunsheng wang <wwccss@263.net>
* @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;
}
$argcount = func_num_args();
for($i = 1;$i < $argcount;$i ++)
{
$arg = func_get_arg($i);
if(!eregi("sort",$arg))
{
$keynamelist[] = $arg;
$sortrule[] = '$'.$arg;
}
else
{
$sortrule[] = $arg;
}
}
foreach($arraydata as $key => $info)
{
foreach($keynamelist as $keyname)
{
${$keyname}[$key] = $info[$keyname];
}
}
$evalstring = 'array_multisort('.join(",",$sortrule).',$arraydata);';
eval ($evalstring);
return $arraydata;
}
//################# 示例 #################
$arr = array(
array(
'name' => '学习',
'size' => '1235',
'type' => 'jpe',
'time' => '1921-11-13',
'class' => 'd',
),
array(
'name' => '中国功夫',
'size' => '153',
'type' => 'jpe',
'time' => '2005-11-13',
'class' => 'j',
),
array(
'name' => '编程',
'size' => '35',
'type' => 'gif',
'time' => '1997-11-13',
'class' => 'a',
),
array(
'name' => '中国功夫',
'size' => '65',
'type' => 'jpe',
'time' => '1925-02-13',
'class' => 'd',
),
array(
'name' => '中国功夫',
'size' => '5',
'type' => 'icon',
'time' => '1967-12-13',
'class' => 'c',
),
);
print_r($arr);
//注意：按照数字方式排序时 153 比 65 小
$temp = syssortarray($arr,"class","sort_asc","type","sort_desc","size","sort_asc","sort_string");
echo "<pre>";
print_r($temp);
?>