php长文章分页原理与实现程序_PHP教程

$content1="内容要很长。。。。。。";

$current=$_REQUEST['page_t'];
$result=ff_page($content1,$current);
echo $result;

function ff_page($content,$page)
{
global $expert_id;

if (empty($page)) {
$page = 1 ;
} //给$page赋初始值

$PageLength = 2000; //每页字数
$CLength = strlen($content); //文章长度
$PageCount = floor(($CLength / $PageLength)) + 1; //计算页数
$PageArray=array();//断页位置数组
$Seperator = array("n","r","。","!","?",";",",","”","’",".","！","？","；"); //分隔符号

//echo "页数：".$PageCount."
";
//echo "长度：".$CLength."
";
//strpos() 函数返回字符串在另一个字符串中第一次出现的位置

if($CLength <= $PageLength)
{
echo $content;
}//如果只有一页，直接打印
else{
$PageArray[0]=0;
$Pos = 0;
$i=0;
//第一页，print_r($Seperator);
for( $j=0 ; $j < sizeof($Seperator); $j++)
{
$Pos=strpos($content,$Seperator[$j],$PageArray[$i]+1900);
while($Pos > 0 && $Pos<($i+1)*$PageLength && $Pos > $i*$PageLength )
{
$PageArray[$i] = $Pos ;
if ($Pos+$PageLength > $CLength)
{
$start_p = $CLength-1 ;
}
else{
$start_p = $Pos+$PageLength ;
}
//给一个找寻位置的起始点，防止超过位置总字符数
$Pos = strpos($content,$Seperator[$j],$start_p) ;
}
//如果已经找到分页点，跳出循环
if($PageArray[$i]>0)
{
$j = $j + sizeof($Seperator) + 1;
}
}

for( $i = 1; $i < $PageCount-1; $i++ )
{
for( $j = 0 ; $j < sizeof($Seperator); $j++)
{
$Pos=strpos($content,$Seperator[$j],$PageArray[$i-1]+1900);
while($Pos > 0 && $Pos < ($i+1)*$PageLength && $Pos > $i*$PageLength )
{
$PageArray[$i] = $Pos ;
if ($Pos+$PageLength > $CLength)
{
$start_p2 = $CLength-1 ;
}
else{
$start_p2 = $Pos+$PageLength ;
}
$Pos = strpos($content,$Seperator[$j],$start_p2) ;
}
if($PageArray[$i]>0)
{
$j = $j + sizeof($Seperator) + 1;
}
}
}
//--PHP长文章分页函数最后一页
$PageArray[$PageCount-1] = $CLength;
//$page=2;

if($page==1)
{
$output=substr($content,0,$PageArray[$page-1]+2);
}
if($page > 1 && $page <= $PageCount)
{
$output=substr($content,$PageArray[$page-2]+2,$PageArray[$page-1]-$PageArray[$page-2]);
$output=" （上接第".($page-1)."页）n".$output;
}

// echo str_replace("n","
",$output); //回车换行，根据需要调整
echo $output ;

if($PageCount > 1)
{
echo "

?>

class contentpage
{
private $content; //文章内容
private $pagesize; //每页最少字节数
private $breakflag; //分页符（可以自定义，默认为n）
private $pageurl; //url地址
private $pagevar; //分页参数
public $pagecount; //总页数
public $page; //当前页码
public $pagebreak; //每页起始位置

function __construct($content = "",$pagesize = 10,$breakflag ="n",$pageurl = '',$pagevar = 'p')
{
$this->content = $content;
$this->pagesize = $pagesize;
$this->breakflag = $breakflag;
$this->pageurl = $pageurl;
$this->pagevar = $pagevar;
$this->getpages();
}

//总页数，每页的起始位置和结束位置
public function getpages()
{
$contentlen = strlen($this->content); //文章总字节数
$this->pagebreak[0] = 0;
$i = 0;
$offset = $this->pagesize;

for ($k=0;$k<$contentlen/$this->pagesize;$k++)
{
if($offset > $contentlen)
{
$i++;
$this->pagebreak[$i] = $contentlen;
break;
}
//查找$this->pagevar出现的位置
$where = strpos($this->content,$this->breakflag,$offset);
if($where > $contentlen or intval($where) < 1)
{
$i++;
$this->pagebreak[$i] = $contentlen;
break;
}
else
{
$i++;
$this->pagebreak[$i] = $where;
$offset = $where + $this->pagesize;
}
}
$this->pagecount = $i;
if(isset($_get[$this->pagevar]) && $_get[$this->pagevar] >1 && $_get[$this->pagevar] <= $this->pagecount)
{
$this->page = $_get[$this->pagevar];
}
else
{
$this->page = 1;
}
}

//每页内容
function getpage()
{
//截取当前页码的数据
if($this->page > 1)
{
return substr($this->content,$this->pagebreak[$this->page-1]+1,$this->pagebreak[$this->page] - $this->pagebreak[$this->page-1]);
}
else
{
return substr($this->content,$this->pagebreak[$this->page-1],$this->pagebreak[$this->page] - $this->pagebreak[$this->page-1]);
}

}

//分页条
public function getpagenav()
{
if($this->page > 1)
{
$pagenav = "geturl()."=".($this->page-1)."' class='div'>上一页 ";
}

//输出数字页码
for($j=1;$j<=$this->pagecount;$j++)
{
if($j == $this->page)
{
$pagenav .= "".$j." ";
}
else
{
$pagenav .= "geturl()."=".$j."' class='div'>".$j." ";
}
}
//下一页
if($this->page < $this->pagecount && $this->pagecount >1)
{
$pagenav .= "geturl()."=".($this->page+1)."' class='div'>下一页 ";
}
return $pagenav;
}
//获取url地址
public function geturl()
{
$url = $_server['request_uri'];
$parse_url = parse_url($url);
$query_url = $parse_url['query'];

if($query_url)
{
$query_url = ereg_replace("(^|&)".$this->pagevar."=".$this->page,"",$query_url);
$url = str_replace($parse_url['query'],$query_url,$url);
if($query_url)
{
$url .= "&".$this->pagevar;
}
else
{
$url .= $this->pagevar;
}
}
else
{
$url .= "?".$this->pagevar;
}
return $url;
}
}

$content = "第一页：文章内容分页阿斯顿浪费空间阿斯顿来看福建省地方吉林省福建路口附近大手拉飞机上浪费的说浪费监理费
第二页：阿斯顿房间阿双方了解啊对萨拉开发记得谁来付款将令对方空间的来福建阿里是否
第三页：欧文炯诶哦生地拉开方面来看就继续超文章内容分页滤机蓝卡
第四页：欧文日据拉萨及发动四分啊就双方的将爱是发觉是文章内容分页否了。";
$model = new contentpage($content);
echo $model->getpage(); //输出分页内容
echo $model->getpagenav(); //输出页码
?>