PHP+MySQL下分页显示的实现
mysql|分页|显示
最近,论坛里有很我人都在问如何实现查询结果的分页显示。我希望下面的这段代码对你改进自己的程序能有所帮助。这些代码是用于MYSQL的,但很容易移植到其它SQL上。
由于每个程序的特殊性,所以我在MYSQL的查询里使用了一些很通用的语句。用你的表名替换TABLE;用你的条件语句代替YOUR_CONDITION_HERE;用你希望按其排序的字段名代替WHATEVER(当然如果要排倒序,别忘了加上DESC子句)。
$qh=mysql_query("SELECT COUNT(*) AS rcnt FROM TABLE WHERE YOUR_CONDITION_HERE ORDER BY WHATEVER");
$data=mysql_fetch_array($qh);
$nr=$data["rcnt"];
//判断偏移量参数是否传递给了脚本,如果没有就使用默认值0
if (empty($offset))
{
$offset=0;
}
//查询结果(这里是每页20条,但你自己完全可以改变它)
$result=mysql_query("SELECT id,name,phone FROM TABLE WHERE YOUR_CONDITION_HERE ORDER BY WHATEVER LIMIT $offset, 20");
//显示返回的20条记录
while ($data=mysql_fetch_array($result))
{
//换成你用于显示返回记录的代码
}
//下一步,要写出到其它页面的链接
if(!$offset) //如果偏移量是0,不显示前一页的链接
{
$preoffset=$offset-20;
print "前一页 \n";
}
//计算总共需要的页数
$pages=ceil($nr/20); //$pages变量现在包含所需的页数
for ($i=1; $i
{
$newoffset=20*$i;
print "$i \n";
}
//检查是否是最后一页
if ($pages!=0 && ($newoffset/20)!=$pages)
{
print "下一页 \n";
}
?>
这只是向你大概地介绍了实现将查询结果分页显示的方法,其他的功能你自己完成。
注意两点:$PHP_SELF只有偏移量一个参数,你可以根据需要加入自己的东西;这种办法对包含百万条记录以上的表的查询效率不高。

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