PHP 长文章分页函数 带使用方法，不会分割段落,翻页在底部

<?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：".$PageCount."<br>"; 
//echo "长度：".$CLength."<br><br><br>"; 
//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,$Seperator[$j],$PageArray[$i-1]+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; 
} 
} 
} 
//--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","<br>   ",$output); 
//if($page==$PageCount) 
//return $output=substr($content,$PageArray[$page-2]+2,$PageArray[$page-1]-$PageArray[$page-2]); 

if($PageCount>1) 
{ 
echo "<br><br><br><center>"; 
echo "<font color='ff0000'>".$page."</font>/".$PageCount." 页  "; 
if($page>1) 
echo "<a href=$PHP_SELF?expert_id=$expert_id&page_t=".($page-1).">上一页</a> "; 
else 
echo "上一页 "; 

for($i=1;$i<=$PageCount;$i++) 
{ 

echo "<a href=$PHP_SELF?expert_id=$expert_id&page_t=".$i.">[".$i."]</a> "; 
} 

if($page<$PageCount) 
echo " <a href=$PHP_SELF?expert_id=$expert_id&page_t=".($page+1).">下一页</a> "; 
else 
echo " 下一页 "; 

echo "</center>"; 
} 
} 

}?>

<?php 
$content1=''测试文字，尽量长一些，www.jb51.net"; 
$current=$_REQUEST['page_t']; 
$result=ff_page($content1,$current); 
echo $result; 
?>