search
Homephp教程php手册php中长文章分页显示实现代码

php中长文章分页显示实现代码

Jun 13, 2016 am 11:57 AM
includephpcomminicatecodePaginationcopyaccomplisharticleshow

欢迎交流!实现代码如下:

复制代码 代码如下:



/**
*Author:乌鸟heart
*实现长文章分页的代码
*原理:
*利用一个数组来记录文章每一页(用p0、p1、p2...做手动标记)的起始字节数,然后通过利用php函数操作这个数组去显示分页后的文章。分页显示,传递ptag(与tag的值一样)值。
*利用到的php函数:
*1、strlen("字符串") - Returns the length of the given string. - 返回字符串的字节总数。
*2、strpos("字符串","匹配字符") - Returns the numeric position of the first occurrence of needle in the haystack string. - 返回字符串中出现的第一个相匹配的字符所在的字节序数。
*3、substr("字符串","起始位置","终止位置") - substr() returns the portion of string specified by the start and length parameters. - 返回字符串中指定起止位置的若干字符。
*/
$sql = "select * from article where id = 41";//定义sql语句,返回id为41的内容
$result = mysql_query($sql);//执行sql语句,返回结果集
$row = mysql_fetch_array($result);//以数组的形式从记录集返回
$content = $row['content'];//把文章赋给变量$content
$articleCounts = strlen($content);//返回$content(文章)的总字节数
$isTrue = true;//循环标记
$tag = 0;//分页标记、数组下标
echo "字节总数:".$articleCounts."
";//测试信息
//寻找标记“ptag”,并把其位置(所在的字节数)赋给数组array[]------------------------------------------
while($isTrue){
$startAt = strpos($content,"p".$tag);//得到相应ptag的字节序数
if($startAt != false){ //如果有标记(返回值不是false),则记录位置
$array[$tag++] = $startAt;
}else{ //如果没有标记,则将数组array[0]赋值'\0'
$array[$tag] = '\0';
$isTrue = false;
}
}
//循环输出标记位置-------------------------------------------------------------测试信息
for($i = 0; $i echo $array[$i]."
";
}
echo "------------------------------
";
//输出内容---------------------------------------------------------------------
if($array[0] == '\0'){ //判断是否有标记
echo $content; //没有标记的情况,单页显示
}else{ //有标记的情况,分页显示
//输出分页内容
if( isset($_GET['ptag']) ){ //判断是否有ptag值传递,有则显示第 ptag+1 页,否则显示第一页(ptag=0)
$ptag = $_GET['ptag']; //把ptag的值赋给变量$ptag
if($ptag echo "有值传递,显示第".($ptag+1)."页
"; //测试信息
echo "值为:".$ptag."
"; //测试信息
echo substr($content,$array[$ptag - 1] + 2,$array[$ptag] - $array[$ptag - 1] - 2);//显示ptag+1页的内容
}else{echo "参数有误";}
}
else{ //没有ptag值传递的情况,显示第一页(ptag=0)
echo "无值传递,显示第1页
"; //测试信息
echo substr($content,0,$array[0] - 1);//显示第一页的内容
}
}
//循环显示页数链接-------------------------------------------------------------
if($array[0] != '\0'){ //在有手动标记的情况下才显示页数链接
for($i = 0;$i if($ptag == $i){ //如果是本页,则粗体显示
$pager .= " ".($i+1)." ";
}else{ //不是本页
$pager .= " ".($i+1)." ";
}
}
echo "
跳转至第".$pager."页"; //输出链接
}
?>

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.