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php中截取字符串支持utf-8_PHP教程

Jul 21, 2016 pm 03:57 PM

4月 e php string utf-8 字符串截取支持

截取字符串
$string="2006年4月我又长大了一岁！";
echo substr($string,1)."...";
//截取字符串
function SubstrGB($in,$num)
{
$pos=0;
$out="";
while($pos {
  $c=substr($in,$pos,1);
  if($c=="\n") break;
  if(ord($c)>128)
  {
   $out.=$c;
   $pos++;
   $c=substr($in,$pos,1);
   $out.=$c;
  }
  else
  {
   $out.=$c;
  }
  $pos++;
  if($pos>=$num) break;
}
        return $out;
}
  echo SubstrGB($string,8) ;
?>
/***************************************************************************
*            cut_string.php
*        ------------------------------
*    Date        : Jul 16, 2005
*    Copyright    : none
*    Mail        :
*
*    作用:截取中文字符.
*
*
***************************************************************************/
function cut_str($string, $sublen, $start = 0, $code = 'UTF-8')
{
    if($code == 'UTF-8')
    {
        $pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/";
        preg_match_all($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; $i        {
            if($i>=$start && $i            {
            if(ord(substr($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)        return $tmpstr;
    }
}
    echo "
".cut_str($string,8,$start=0,$code='sdf') ;
?>