php分页函数
2013-08-04 14:15 来源: 站长圈 点击:
<?php/*需求，建立一个test数据库，在里边建一个test表，里面就只要id字段，输入一下数据就可以啦。。由于水平有限，难免出错。。*/$conn = mysql_connect("localhost","root","");$maxnum = 2; //每页显示记录条数mysql_select_db("test", $conn);$query1 = "SELECT COUNT(*) AS totalrows FROM test ";$result1 = mysql_query($query1, $conn) or die(mysql_error());$row1 = mysql_fetch_assoc($result1);$totalRows1 = $row1['totalrows']; //数据集数据总条数$totalpages = ceil($totalRows1/$maxnum);//计算可分页总数，ceil()为上舍函数if(!isset($_GET['page']) || !intval($_GET['page']) || $_GET['page'] > $totalpages) $page = 1; //对3种出错进行默认处理//在url参数page不存在时，page不为10进制数时，page大于可分页数时，默认为1else $page = $_GET['page'];$startnum = ($page - 1)*$maxnum; //从数据集第$startnum条开始取，注意数据集是从0开始的$query = "SELECT * FROM test LIMIT $startnum,$maxnum";//选择出符合要求的数据 从$startnum条数据开始，选出$maxnum行$result = mysql_query($query, $conn) or die(mysql_error());$row = mysql_fetch_assoc($result);?><html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>分页示例</title><script language="JavaScript" type="text/JavaScript"><!--function MM_jumpMenu(targ,selObj,restore){ //v3.0eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");if (restore) selObj.selectedIndex=0;}//--></script><style type="text/css">a{text-decoration:none;}a:hover{text-decoration:underline}table{font-size:12px;}.tb{background-color:#73BB95}.tr{background-color:#FFFFFF}</style></head><body><table width="30%" border="0" align="center" cellpadding="0" cellspacing="1" class="tb"><tr><td height="24"><div align="left">分页示例</div></td></tr><?php if($totalRows1) {//记录集不为空显示do {?><tr class="tr"><td height="24"><div align="center"><?php echo $row['id'];?></div></td></tr><?php }while($row = mysql_fetch_assoc($result));?></table><table width="95%" border="0" align="center" cellpadding="0" cellspacing="0"><tr><form name="form1"><td height="27"><div align="center"><?phpecho "共计<font color=\"#ff0000\">$totalRows1</font>条记录";echo "<font color=\"#ff0000\">".$page."</font>"."/".$totalpages."页 ";//实现 << < 1 2 3 4 5> >> 分页链接$pre = $page - 1;//上一页$next = $page + 1;//下一页$maxpages = 4;//处理分页时 << < 1 2 3 4 > >>显示4页$pagepre = 1;//如果当前页面是4，还要显示前$pagepre页，如<< < 3 /4/ 5 6 > >> 把第3页显示出来if($page != 1) { echo "<a href='".$_SERVER['PHP_SELF']."'><<</a> ";echo "<a href='".$_SERVER['PHP_SELF'].'?page='.$pre."'><</a> ";}if($maxpages>=$totalpages) //如果总记录不足以显示4页{$pgstart = 1;$pgend = $totalpages;}//就不所以的页面打印处理elseif(($page-$pagepre-1+$maxpages)>$totalpages)//就好像总页数是6，当前是5，则要把之前的3 4 显示出来，而不仅仅是4{$pgstart = $totalpages - $maxpages + 1;$pgend = $totalpages;}else{$pgstart=(($page<=$pagepre)?1:($page-$pagepre));//当前页面是1时，只会是1 2 3 4 > >>而不会是 0 1 2 3 > >>$pgend=(($pgstart==1)?$maxpages:($pgstart+$maxpages-1));}for($pg=$pgstart;$pg<=$pgend;$pg++){ //跳转菜单if($pg == $page) echo "<a href=\"".$_SERVER['PHP_SELF']."?page=$pg\"><font color=\"#ff0000\">$pg</font></a> ";else echo "<a href=\"".$_SERVER['PHP_SELF']."?page=$pg\">$pg</a> ";}if($page != $totalpages){echo "<a href='".$_SERVER['PHP_SELF'].'?page='.$next."'>></a> ";echo "<a href='".$_SERVER['PHP_SELF'].'?page='.$totalpages."'>>></a> ";}?><select name="menu1" onChange="MM_jumpMenu('parent',this,0)"><option value="">选择</option><?php for($pg1=1;$pg1<=$totalpages;$pg1++) {echo "<option value=\"".$_SERVER['PHP_SELF']."?page=$pg1\">".$pg1."</option>";}?></select></td></form></tr></table><?php } else {//记录集为空时显示?><tr class="tr"><td height="24"><div align="center">没有任何记录</div></td></tr></table><?php }?></body></html><?phpmysql_free_result($result1);mysql_free_result($result);?>
