这三个字符，是传说中的BOM啊

说明你用于下载的php文件，格式为UTF-8withBOM，用Notepad++看一下呢，

或者把你所有的php文件讀出來，然后移除一下？

/***移除字符串的BOM**@paramstring$str输入字符串*@returnstring输出字符串*/functionremoveBOM($str){$str_2=substr($str,0,2);$str_3=substr($str,0,3);//$str_2.$str{2};$str_4=substr($str,0,4);//$str_3.$str{3};if($str_3==pack('CCC',0xef,0xbb,0xbf))//utf-8returnsubstr($str,3);elseif($str_2==pack('CC',0xfe,0xff)||$str_2==pack('CC',0xff,0xfe))//unicodereturnsubstr($str,2);elseif($str_4==pack('CCCC',0x00,0x00,0xfe,0xff)||$str_4==pack('CCCC',0xff,0xfe,0x00,0x00))//utf-32returnsubstr($str,4);return$str;}