电脑技术学习

实现“上一页”和“下一页"按钮

dn001
<?php;;
//本例子摘自phpbuilder.com;;
//稍加翻译;;
//<sprming@netease.com>;;

$limit=20; // 每页显示的行数;;
$numresults=mysql_query("select * from TABLE where YOUR CONDITIONAL HERE order by WHATEVER");//换成你所需要的sql语句;;
$numrows=mysql_num_rows($numresults);;;

// next determine if offset has been passed to script, if not use 0;;
if (empty($offset)) {;;
$offset=1;;;
};;

// 得到查询结果;;
$result=mysql_query("select id,name,phone ".;;
"from TABLE where YOUR CONDITIONAL HERE ".;;
"order by WHATEVER limit $offset,$limit");;;

// 现在显示查询结果;;
while ($data=mysql_fetch_array($result)) {;;
// 在这里插入您要显示的结果以及样式;;
};;

// 显示按钮;;

if ($offset!=1) { // bypass PREV link if offset is 1;;
$prevoffset=$offset-20;;;
print "<a href="$PHP_SELF?offset=$prevoffset">上一页</a> &nbsp; n";;;
};;

// 计算页面数;;
$pages=intval($numrows/$limit);;;

// $pages now contains int of pages needed unless there is a remainder from division;;
if ($numrows%$limit) {;;
// has remainder so add one page;;
$pages++;;;
};;

for ($i=1;$i<=$pages;$i++) { // 显示页数;;
$newoffset=$limit*($i-1);;;
print "<a href="$PHP_SELF?offset=$newoffset">$i</a> &nbsp; n";;;
};;

// check to see if last page;;
if (!(($offset/$limit)==$pages) && $pages!=1) {;;
// not last page so give NEXT link;;
$newoffset=$offset+$limit;;;
print "<a href="$PHP_SELF?offset=$newoffset">下一页</a><p>n";;;
};;

?>;;


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