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php截取中文字符串函数实例_PHP

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Release: 2016-05-31 13:16:53
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本文实例讲述了php截取中文字符串函数。分享给大家供大家参考。具体实现方法如下:

代码如下:

//中文字符串截取
function substr_zh($string,$sublen,$start=0,$code='UTF-8'){
 if($code=='UTF-8'){
  $pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
  preg_match_all($pa,$string,$t_string);
  if(count($t_string[0])-$start > $sublen){
   return join('',array_slice($t_string[0],$start,$sublen))."...";
   //array_slice()在数组中根据条件取出一段值,参数(数组,开始位置,[长度])
  }else{
   return join('',array_slice($t_string[0],$start,$sublen));
  }
 }else{
  $start = $start*2;
  $sublen = $sublen*2;
  $strlen = strlen($string);
  $tmpstr = '';
  for($i=0;$i    if($i>$start && $i     if(ord(substr($string,$i,1))>129){
    //ord():返回字符串第一个字符的ASCII值
    //substr():返回字符串的一部分
     $tmpstr .= substr($string,$i,2);
    }else{
     $tmpstr .= substr($string,$i,1);
    }
   }
   if(ord(substr($string,$i,1))>129){
    $i++;
   }
   if(strlen($tmpstr)     $tmpstr .= "...";
   }
  }
  return $tmpstr;
 }
}
$string ="顶置车顶起困境檲上盯协押畏奇才趄肯困楞右脚可爱有";
echo substr_zh($string,10,0,'gb2312');
?>

希望本文所述对大家的php程序设计有所帮助。

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