


How to retrieve complex data and display it in pages_PHP tutorial
系统标题:复杂检索数据并分页显示的处理方法
系统功能:利用临时表检索数据库数据,然后分页显示的方法:
处理方法:采用临时表存放数据中间结果,根据中间结果显示数据
数据的显示采用隔行的方式处理
处理优点:对于复杂的查询,特别是涉及到多表的数据查询,如果直接使用查询条件,系统的
开销将很大,利用临时表把数据先保存,然后处理。这样对数据库的查询只要开销一次。
使用方法:只要把连接数据库的用户信息和数据表改变即可使用
//连接数据库
$dbh = mysql_connect('localhost:3306','root','');
mysql_select_db('test');
//把数据检索的结果保存到临时表中
$ls_sql = ' create temporary table temps ';
$ls_sql .= ' select lk_title,lk_link from lk_t_content ';
$ls_sql .= " where lk_title like '%".$searchcontent."%' ";
$res = mysql_query($ls_sql, $dbh);
//得到检索数据的总数
$ls_sql = 'select count(*) as rcnt_con from temps ';
$res = mysql_query($ls_sql, $dbh);
$rcon = $row["rcnt_con"];
$pages=ceil($rcon / 20); //$pages变量现在总的页数
if (empty($offset)) {
$offset=1;
$curline = 0;
} else
$curline = ($offset - 1) * 20;
//打印表头
print '
'; if ($offset <> 1) { //如果偏移量是0,不显示前一页的链接 $newoffset=$offset - 1; print "前一页"; } else { print "前一页"; print " "; } //显示所有的页数 for ($i=1; $i <= $pages; $i++) { $temps = "".$i.""; print $temps; print " "; } //检查是否是最后一页 if ($pages!=0 && $offset!=$pages) { $newoffset=$offset+1; print "下一页"; } else print "下一页"; print ' | '; '; print "当前页:".$offset." 共".$pages."页"; print ' | ';
//显示查询信息
print '
查询结果信息 | ';
'.$tempstr.' | ';
?>
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