PHP utf-8中文截取無亂碼(字串判斷版本）

/*E4 B8 AD E5 9B BD   中國1110 0100    10111000   101011011110 0101    100110111011110161  a0011 11010xxx xxxx ,1個位元組110xx xxxx , 2個位元組1110 xxxx, 31111 0xxxx 4...*/
$str = '中華人aaa民共b和國,c萬歲';function utf8sub($str,$len){if($len <=0) return '';$length = strlen($str);$offset=0;$chars=0;$res='';while($chars<$len && $offset<$length){$heigh = decbin(ord(substr($str, $offset,1)));echo $heigh ,'
';if(strlen($heigh)<8){$count=1;}else if(substr($heigh,0,3) == '110'){$count=2;}else if(substr($heigh,0,4) == '1110'){$count=3;}else if(substr($heigh,0,5) == '11110'){$count=4;}else if(substr($heigh,0,6) == '111110'){$count=5;}else if(substr($heigh,0,7) == '1111110'){$count=6;}$res .= substr($str, $offset,$count);$chars += 1;$offset += $count;}return $res;}echo utf8sub($str,10);


                                                
                    以上就介紹了PHP utf-8中文截取無亂碼(字串判斷版本），包括了方面的內容，希望對PHP教程有興趣的朋友有所協助。
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