PHP 长文章分页函数 带使用方法，不会分割段落,翻页在底部

<div class="codetitle"><a style="CURSOR: pointer" data="57864" class="copybut" id="copybut57864" onclick="doCopy('code57864')"> 代码如下:<div class="codebody" id="code57864">
<?php function ff_page($content,$page)
{
global $expert_id;
$PageLength = 2000; //每页字数
$CLength = strlen($content);
$PageCount = floor(($CLength / $PageLength)) + 1; //计算页数
$PageArray=array();
$Seperator = array("n","r","。","！","？","；","，","”","'"); //分隔符号 //echo "页数：".$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; }else{ $PageArray[0]=0;
$Pos = 0;
$i=0;
//第一页
for($j=0;$j<sizeof($Seperator);$j++)
{
//echo $Seperator[$j];
$Pos=strpos($content,$Seperator[$j],$PageArray[$i]+1900);
while($Pos > 0 && $Pos < ($i+1)$PageLength && $Pos > $i$PageLength )
{
$PageArray[$i] = $Pos ;
$Pos = strpos($Pos+$PageLength,$content,$Seperator[$j]) ;
}
if($PageArray[$i]>0)
{
$j = $j + sizeof($Seperator) + 1;
}
} //---
for($i=1;$i<$PageCount-1;$i++){ for($j=0;$j<sizeof($Seperator);$j++)
{
//echo $Seperator[$j];
$Pos=strpos($content,$PageArray[$i-1]+1900);
while($Pos > 0 && $Pos < ($i+1)$PageLength && $Pos > $i$PageLength )
{
$PageArray[$i] = $Pos ;
$Pos = strpos($Pos+$PageLength,$Seperator[$j]) ;
}
if($PageArray[$i]>0)
{
$j = $j + sizeof($Seperator) + 1;
}
}
}
//--最后一页
$PageArray[$PageCount-1]=$CLength; //$page=2;
if($page==1)
{
$output=substr($content,$PageArray[$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);
//if($page==$PageCount)
//return $output=substr($content,$PageArray[$page-1]-$PageArray[$page-2]); if($PageCount>1)
{
echo "