关于简介的截取，里面有HTM

Question

建议先用 strip_tags() 把 html 过滤掉再做截取

Answer 1

function slen($str,$count) {
if (isset($str) && !empty($str)){
$str = substr($str, 0, $count).chr(0);
return $str;
}else{
return "";
}
}

Answer 2

function mysubstr($str, $start, $len) {
        $tmpstr = "";
        $strlen = $start + $len;
        for($i = 0; $i < $strlen; $i++) {
                  if(ord(substr($str, $i, 1)) > 0xa0) {
                            $tmpstr .= substr($str, $i, 2);
                            $i++;
                  } else
                            $tmpstr .= substr($str, $i, 1);
        }
        return $tmpstr;
}

Answer 3

function utf8Substr($str, $from, $len)
{
        return preg_replace('#^(?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$from.'}'.
                                                      '((?:[\x00-\x7F]|[\xC0-\xFF][\x80-\xBF]+){0,'.$len.'}).*#s',
                                                      '$1',$str);
}

Answer 4

function cut_str($string, $sublen, $start = 0, $code = 'UTF-8') 
{ 
        if($code == 'UTF-8') 
        { 
$pa="/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|";
$pa.="\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/"; 
                  preg_match_all($pa, $string, $t_string); 
   
                  if(count($t_string[0]) - $start > $sublen) return join('', array_slice($t_string[0], $start, $sublen))."..."; 
                  return join('', array_slice($t_string[0], $start, $sublen)); 
        } 
        else 
        { 
                  $start = $start*2; 
                  $sublen = $sublen*2; 
                  $strlen = strlen($string); 
                  $tmpstr = ''; 
   
                  for($i=0; $i<$strlen; $i++) 
                  { 
                            if($i>=$start && $i<($start+$sublen)) 
                            { 
                                      if(ord(substr($string, $i, 1))>129) 
                                      { 
                                                $tmpstr.= substr($string, $i, 2); 
                                      } 
                                      else 
                                      { 
                                                $tmpstr.= substr($string, $i, 1); 
                                      } 
                            } 
                            if(ord(substr($string, $i, 1))>129) $i++; 
                  } 
                  if(strlen($tmpstr)<$strlen ) $tmpstr.= "..."; 
                  return $tmpstr; 
        } 
} 
   
$str = "abcd需要截取的字符串"; 
echo cut_str($str, 8, 0, 'gb2312'); 

Answer 5

/** 
   * @package           BugFree 
   * @version           $Id: FunctionsMain.inc.php,v 1.32 2005/09/24 11:38:37 wwccss Exp $ 
   * 
   * 
   * Return part of a string(Enhance the function substr()) 
   * 
   * @author                                             Chunsheng Wang <[email protected]> 
   * @param string     $String     the string to cut. 
   * @param int              $Length     the length of returned string. 
   * @param booble     $Append     whether append "...": false|true 
   * @return string                             the cutted string. 
   */ 
function sysSubStr($String,$Length,$Append = false) 
{ 
        if (strlen($String) <= $Length ) 
        { 
                  return $String; 
        } 
        else 
        { 
                  $I = 0; 
                  while ($I < $Length) 
                  { 
                            $StringTMP = substr($String,$I,1); 
                            if ( ord($StringTMP) >=224 ) 
                            { 
                                      $StringTMP = substr($String,$I,3); 
                                      $I = $I + 3; 
                            } 
                            elseif( ord($StringTMP) >=192 ) 
                            { 
                                      $StringTMP = substr($String,$I,2); 
                                      $I = $I + 2; 
                            } 
                            else 
                            { 
                                      $I = $I + 1; 
                            } 
                            $StringLast[] = $StringTMP; 
                  } 
                  $StringLast = implode("",$StringLast); 
                  if($Append) 
                  { 
                            $StringLast .= "..."; 
                  } 
                  return $StringLast; 
        } 
} 
   
$String = "CodeBit.cn -- 简单、精彩、通用"; 
$Length = "18"; 
$Append = false; 
echo sysSubStr($String,$Length,$Append); 

Answer 6

yzxlyd
刘懿东大猪头大哥，你随便COPY些代码来干吗啊？那些代码你知道是什么意思吗？ 我晕，拿这里当百度贴吧了，以为随便复制点东西就能拿分。shagoo 
我是想写一个BLOG程序，但是把HTM或者UBB过滤了，就显示不出贴图了。
我的意思是一个正则 <*> 或者 [*]， 把这些内容显示出来，并且不算进字符串的统计里。

Answer 7

试试这个8
O.ohttp://www.hua2r.com/blog/20c3dfecb972ccb0421cd0402bfa1106.html

Answer 8

看错，还以为是字符串截取
http://hi.baidu.com/phps/blog/item/d0f4b61b0fab9f1b8718bf80.html
http://blog.csdn.net/wydin/archive/2007/07/18/1696490.aspx