中文截取无乱码（2种方法） $str的字符个数，造成无谓的while循环，($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