中文截取无乱码（2种方法）//$str 待截取的字符串//$len 截取的字符个数//$chars 已经截取的字符数//$res 保存的字符串//$chars 保存已经截取的字符串个数//$offset 截取的偏移量//$length 字符串的字节数//若$len>$str的字符个数，造成无谓的while循环，($offsetfunction utf8sub($str,$len){if($len return ;}$res="";$offset=0;$chars=0;$length=strlen($str);while($chars$hign=decbin(ord(substr($str,$offset,1)));if(strlen($hign) $count=1;}elseif(substr($hign,0,3)=="110"){$count=2;}elseif(substr($hign,0,4)=="1110"){$count=3;}elseif(substr($hign,0,5)=="11110"){$count=4;}elseif(substr($hign,0,6)=="111110"){$count=5;}elseif(substr($hign,0,7)=="1111110"){$count=6;}$res.=substr($str,$offset,$count);$offset+=$count;$chars+=1;}return $res;}function utf8sub1($str,$len){$chars=0;$res="";$offset=0;$length=strlen($str);while($chars $hign=decbin(ord(substr($str,$offset,1)));if(strlen($hign) $count=1;}elseif($hign & "11100000"=="11000000"){$count=2;}elseif($hign & "11110000"=="11100000"){$count=3;}elseif($hign & "11111000"=="11110000"){$count=4;}elseif($hign & "11111100"=="11111000"){$count=5;}elseif($hign & "11111110"=="11111100"){$count=6;}$res.=substr($str,$offset,$count);$chars++;$offset+=$count;}return $res;}$a="中华ah人民hdj";echo utf8sub($a,5);?>复制代码
中文截取无乱码（2种方法）
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