SELECT * FROM table WHERE id IN(5,7,1,10,3,8) ORDER BY FIND_IN_SET(id,'5,7,1,10,3,8');

------解决方案--------------------

//我的测试结果显示PHP排序速度优于MySQL排序速度,刷新了NN次只有1次是PHP慢过MySQL的,请大家也测试一下吧

<?php
//date_default_timezone_set('Asia/Shanghai');? 
$link = mysql_connect('localhost','root');
mysql_select_db('test');

$timeS1 = microtime();
$sql = "SELECT * FROM `lean` WHERE id IN(5,7,1,10,3,8) ORDER BY FIND_IN_SET(id,'5,7,1,10,3,8')";
//for($i = 1, $i <= 100, $++){
	$result = mysql_query($sql);
	while($row = mysql_fetch_array($result))
	{
		
	}
//}
$timeE1 = microtime();
echo '由数据库自行处理的起止时差为: '.($timeE1 - $timeS1).'<br/>';

//释放译一下php的内存先,免得因为前面的变量影响了效率
unset($timeS1);
unset($timeS2);
unset($link);   //已经自动设定了活动数据库了,当前调试不用传递这个,所以把它也释放了吧
unset($sql);
unset($result);
unset($row);



//////////////////////
$timeS2 = microtime();
$sql = "SELECT * FROM `lean` WHERE id IN(5,7,1,10,3,8)";
$result = mysql_query($sql);
$data = array();
$i = 0;
while($row = mysql_fetch_array($result))
{
	$data[$row['id']] = $row;
	$i++;
}

$r = sortdata($data, array(5,7,1,10,3,8));

$timeE2 = microtime();
echo '由PHP处理的起止时差为: '.($timeE2 - $timeS2);

echo '<pre>排序结果<br/>';
print_r($r);
echo '</pre>';

//排序函数
function sortdata($arr,$order){
	$r = array();
	$i = 0;
	foreach($arr as $key => $value){
		$r[$order[$i]] = $value;
		$i++;
	}
	return $r;
}