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两款php 截取字符串函数

提供两款php 截取字符串函数，他们能自动识别中文哦，如果你是截取文章这个很不错啊，喜欢就进来看看吧。
 代码如下 复制代码

<?php
header ( "content-type:text/html; charset=utf-8" );

    function strcut($string, $length, $dot = '...',$charset='utf-8')
        {

      $strlen = strlen($string);

      if($strlen <= $length) return $string;

      $strcut = '';

      if(strtolower($charset) == 'utf-8')

      {

      $n = $tn = $noc = 0;

      while($n < $strlen)

      {

      $t = ord($string[$n]);

      if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {

      $tn = 1; $n++; $noc++;

      } elseif(194 <= $t && $t <= 223) {

      $tn = 2; $n += 2; $noc += 2;

      } elseif(224 <= $t && $t <= 239) {

      $tn = 3; $n += 3; $noc += 3;

      } elseif(240 <= $t && $t <= 247) {

      $tn = 4; $n += 4; $noc += 4;

      } elseif(248 <= $t && $t <= 251) {

      $tn = 5; $n += 5; $noc += 5;
      } elseif($t == 252 || $t == 253)
      {
        $tn = 6; $n += 6; $noc += 6;
      }
      else
      {

      $n++;

      }
      if($noc >= $length) break;
      }
      if($noc > $length) $n -= $tn;
      $strcut = substr($string, 0, $n);

      }
      else
      {
        $dotlen = strlen($dot);
        $maxi = $length - $dotlen - 1;

        for($i = 0; $i < $maxi; $i++)
        {
          $strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
        }
      }
      var_dump($strcut);
      return $strcut;
        }
        echo "jjjkkklll";
        echo strcut("向kk向向向kk向向向kk向向kkklllllllllllmmmmmmmmmmmmmmm向东阳",12)


字符截取函数二

 代码如下 复制代码
function splitstr($str,$len){
    if($len<=0){
  return false;
    }
    else{
  $slen=strlen($str);
  if($len>=$slen)
      return $str;
  else{
      for($i=0;$i<($len-1);$i++){
    if(ord(substr($str,$i,1))>0xa0)
  $i++;
      }
      if($i>=$len)
    return substr($str,0,$len);
elseif(ord(substr($str,$i,1))>0xa0)
    return substr($str,0,$len-1);
      else
    return substr($str,0,$len);
  }
    }
}



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