在php中,heredoc语法为输出大量文本提供了一种非常便利的方式。
它不是使用双引号或单引号来界定字符串,而是采用了两个相同的首尾标识符。
来看下面的例子:
以上示例,有几个值得注意的地方:
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>php make page list</title>
<style type="text/CSS">
<!--
.page a:link {
color: #0000FF;
text-decoration: none;
}
.page a:visited {
text-decoration: none;
color: #0000FF;
}
.page a:hover {
text-decoration: none;
color: #0000FF;
}
.page a:active {
text-decoration: none;
color: #0000FF;
}
.page{color:#0000FF;}
-->
</style>
</head>
<body>
<table width="530" height="103" border="0" align="center" cellpadding="0" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<th width="30" height="38" bgcolor="#E3E3E3" scope="col">ID</th>
<th width="500" bgcolor="#E3E3E3" scope="col">文章标题</th>
</tr>
<?php
/*
* Created on 2010-4-17
* @link http://www.
* Order by Kove Wong
*/
$link=MySQL_connect('localhost','root','9922233344455');
mysql_select_db('pagelist');
mysql_query()('set names gbk');
$Page_size=10;
$result=mysql_query('select * from v_char');
$count = mysql_num_rows($result);
$page_count = ceil($count/$Page_size);
$init=1;
$page_len=7;
$max_p=$page_count;
$pages=$page_count;
//判断当前页码
if(empty($_GET['page'])||$_GET['page']<0){
$page=1;
}else {
$page=$_GET['page'];
}
$offset=$Page_size*($page-1);
$sql="select * from v_char limit $offset,$Page_size";
$result=mysql_query($sql,$link);
while ($row=mysql_fetch_array($result)) {
?>
<tr>
<td bgcolor="#E0EEE0" height="25px"><div align="center">
<?php echo $row['id']?>
</div></td>
<td bgcolor="#E0EEE"><div align="center">
<?php echo $row['name']?>
</div></td>
</tr>
<?php
}
$page_len = ($page_len%2)?$page_len:$pagelen+1;//页码个数
$pageoffset = ($page_len-1)/2;//页码个数左右偏移量
$key='<div >';
$key.="<span>$page/$pages</span> "; //第几页,共几页
if($page!=1){
$key.="<a href=/index.html"".$_SERVER['PHP_SELF']."?page=1\">第一页</a> "; //第一页
$key.="<a href=/index.html"".$_SERVER['PHP_SELF']."?page=".($page-1)."\">上一页</a>"; //上一页
}else {
$key.="第一页 ";//第一页
$key.="上一页"; //上一页
}
if($pages>$page_len){
//如果当前页小于等于左偏移
if($page<=$pageoffset){
$init=1;
$max_p = $page_len;
}else{//如果当前页大于左偏移
//如果当前页码右偏移超出最大分页数
if($page+$pageoffset>=$pages+1){
$init = $pages-$page_len+1;
}else{
//左右偏移都存在时的计算
$init = $page-$pageoffset;
$max_p = $page+$pageoffset;
}
}
}
for($i=$init;$i<=$max_p;$i++){
if($i==$page){
$key.=' <span>'.$i.'</span>';
} else {
$key.=" <a href=/index.html"".$_SERVER['PHP_SELF']."?page=".$i."\">".$i."</a>";
}
}
if($page!=$pages){
$key.=" <a href=/index.html"".$_SERVER['PHP_SELF']."?page=".($page+1)."\">下一页</a> ";//下一页
$key.="<a href=/index.html"".$_SERVER['PHP_SELF']."?page={$pages}\">最后一页</a>"; //最后一页
}else {
$key.="下一页 ";//下一页
$key.="最后一页"; //最后一页
}
$key.='</div>';
?>
<tr>
<td colspan="2" bgcolor="#E0EEE0"><div align="center"><?php echo $key?></div></td>
</tr>
</table>
</body>
</html>
新手试招-php分页示例代码,看标题就明白了,适合初学的朋友,不妨作个参考了。
/*
test数据库,一个test表,唯一字段Id,作为测试使用
@link http://www.
*/
$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1
else $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){ //v3.0
eval(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" >
<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 >
<td height="24"><div align="center"><?php echo $row['id'];?></div></td>
</tr>
<?php }while($row = mysql_fetch_assoc($result));?>
</table>
<table width="95%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr><form name="form1">
<td height="27"><div align="center">
<?php
echo "共计<font color="#ff0000">$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 >
<td height="24"><div align="center">没有任何记录</div></td>
</tr>
</table>
<?php }?>
</body>
</html>
<?php
mysql_free_result($result1);
mysql_free_result($result);
?>