方法一：根據ASCII碼轉換，GB2312庫對多音字也無能為力。
GB2312標准共收錄6763個漢字，不在范圍內的漢字是無法轉換，如：中國前總理朱镕基的“镕”字。
GB2312中對所收漢字進行了“分區”處理，每區含有94個漢字／符號。這種表示方式也稱為區位碼。
01-09區為特殊符號。
16-55區為一級漢字，按拼音排序。（3755個）
56-87區為二級漢字，按部首／筆畫排序。（3008個）
10-15區及88-94區則未有編碼。
占用的碼位是72*94=6768。其中有5個空位是D7FA-D7FE。所以實際共6763個漢字。其中一級漢字3755個，二級漢字3008個。而此類算法實際只能轉換3755個漢字。
優點：沒有使用大文字庫，文件相對較小，沒有使用正則表達式，性能相對較高。支持首字母轉換。
缺點：沒有在GB2312中收錄的漢字無法轉換，多音字無法識別。
（如果對拼音轉換要求不高的朋友，建議使用這個。）
[php] view plaincopy
<?php
// 此類是根據ASCII碼轉換，GB2312庫對多音字也無能為力。
// GB2312標准共收錄6763個漢字，不在范圍內的漢字是無法轉換，如：中國前總理朱镕基的“镕”字。
class pinyin{
public static function utf8_to($s, $isfirst = false) {
return self::to(self::utf8_to_gb2312($s), $isfirst);
}
public static function utf8_to_gb2312($s) {
return iconv('UTF-8', 'GB2312//IGNORE', $s);
}
// 字符串必須為GB2312編碼
public static function to($s, $isfirst = false) {
$res = '';
$len = strlen($s);
$pinyin_arr = self::get_pinyin_array();
for($i=0; $i<$len; $i++) {
$ascii = ord($s{$i});
if($ascii > 0x80) {
$ascii2 = ord($s{++$i});
$ascii = $ascii * 256 + $ascii2 - 65536;
}
if($ascii < 255 && $ascii > 0) {
if(($ascii >= 48 && $ascii <= 57) || ($ascii >= 97 && $ascii <= 122)) {
$res .= $s{$i}; // 0-9 a-z
}elseif($ascii >= 65 && $ascii <= 90) {
$res .= strtolower($s{$i}); // A-Z
}else{
$res .= '_';
}
}elseif($ascii < -20319 || $ascii > -10247) {
$res .= '_';
}else{
foreach($pinyin_arr as $py=>$asc) {
if($asc <= $ascii) {
$res .= $isfirst ? $py{0} : $py;
break;
}
}
}
}
return $res;
}
public static function to_first($s) {
$ascii = ord($s{0});
if($ascii > 0xE0) {
$s = self::utf8_to_gb2312($s{0}.$s{1}.$s{2});
}elseif($ascii < 0x80) {
if($ascii >= 65 && $ascii <= 90) {
return strtolower($s{0});
}elseif($ascii >= 97 && $ascii <= 122) {
return $s{0};
}else{
return false;
}
}
if(strlen($s) < 2) {
return false;
}
$asc = ord($s{0}) * 256 + ord($s{1}) - 65536;
if($asc>=-20319 && $asc<=-20284) return 'a';
if($asc>=-20283 && $asc<=-19776) return 'b';
if($asc>=-19775 && $asc<=-19219) return 'c';
if($asc>=-19218 && $asc<=-18711) return 'd';
if($asc>=-18710 && $asc<=-18527) return 'e';
if($asc>=-18526 && $asc<=-18240) return 'f';
if($asc>=-18239 && $asc<=-17923) return 'g';
if($asc>=-17922 && $asc<=-17418) return 'h';
if($asc>=-17417 && $asc<=-16475) return 'j';
if($asc>=-16474 && $asc<=-16213) return 'k';
if($asc>=-16212 && $asc<=-15641) return 'l';
if($asc>=-15640 && $asc<=-15166) return 'm';
if($asc>=-15165 && $asc<=-14923) return 'n';
if($asc>=-14922 && $asc<=-14915) return 'o';
if($asc>=-14914 && $asc<=-14631) return 'p';
if($asc>=-14630 && $asc<=-14150) return 'q';
if($asc>=-14149 && $asc<=-14091) return 'r';
if($asc>=-14090 && $asc<=-13319) return 's';
if($asc>=-13318 && $asc<=-12839) return 't';
if($asc>=-12838 && $asc<=-12557) return 'w';
if($asc>=-12556 && $asc<=-11848) return 'x';
if($asc>=-11847 && $asc<=-11056) return 'y';
if($asc>=-11055 && $asc<=-10247) return 'z';
return false;
}
public static function get_pinyin_array() {
static $py_arr;
if(isset($py_arr)) return $py_arr;
$k = 'a|ai|an|ang|ao|ba|bai|ban|bang|bao|bei|ben|beng|bi|bian|biao|bie|bin|bing|bo|bu|ca|cai|can|cang|cao|ce|ceng|cha|chai|chan|chang|chao|che|chen|cheng|chi|chong|chou|chu|chuai|chuan|chuang|chui|chun|chuo|ci|cong|cou|cu|cuan|cui|cun|cuo|da|dai|dan|dang|dao|de|deng|di|dian|diao|die|ding|diu|dong|dou|du|duan|dui|dun|duo|e|en|er|fa|fan|fang|fei|fen|feng|fo|fou|fu|ga|gai|gan|gang|gao|ge|gei|gen|geng|gong|gou|gu|gua|guai|guan|guang|gui|gun|guo|ha|hai|han|hang|hao|he|hei|hen|heng|hong|hou|hu|hua|huai|huan|huang|hui|hun|huo|ji|jia|jian|jiang|jiao|jie|jin|jing|jiong|jiu|ju|juan|jue|jun|ka|kai|kan|kang|kao|ke|ken|keng|kong|kou|ku|kua|kuai|kuan|kuang|kui|kun|kuo|la|lai|lan|lang|lao|le|lei|leng|li|lia|lian|liang|liao|lie|lin|ling|liu|long|lou|lu|lv|luan|lue|lun|luo|ma|mai|man|mang|mao|me|mei|men|meng|mi|mian|miao|mie|min|ming|miu|mo|mou|mu|na|nai|nan|nang|nao|ne|nei|nen|neng|ni|nian|niang|niao|nie|nin|ning|niu|nong|nu|nv|nuan|nue|nuo|o|ou|pa|pai|pan|pang|pao|pei|pen|peng|pi|pian|piao|pie|pin|ping|po|pu|qi|qia|qian|qiang|qiao|qie|qin|qing|qiong|qiu|qu|quan|que|qun|ran|rang|rao|re|ren|reng|ri|rong|rou|ru|ruan|rui|run|ruo|sa|sai|san|sang|sao|se|sen|seng|sha|shai|shan|shang|shao|she|shen|sheng|shi|shou|shu|shua|shuai|shuan|shuang|shui|shun|shuo|si|song|sou|su|suan|sui|sun|suo|ta|tai|tan|tang|tao|te|teng|ti|tian|tiao|tie|ting|tong|tou|tu|tuan|tui|tun|tuo|wa|wai|wan|wang|wei|wen|weng|wo|wu|xi|xia|xian|xiang|xiao|xie|xin|xing|xiong|xiu|xu|xuan|xue|xun|ya|yan|yang|yao|ye|yi|yin|ying|yo|yong|you|yu|yuan|yue|yun|za|zai|zan|zang|zao|ze|zei|zen|zeng|zha|zhai|zhan|zhang|zhao|zhe|zhen|zheng|zhi|zhong|zhou|zhu|zhua|zhuai|zhuan|zhuang|zhui|zhun|zhuo|zi|zong|zou|zu|zuan|zui|zun|zuo';
$v = '-20319|-20317|-20304|-20295|-20292|-20283|-20265|-20257|-20242|-20230|-20051|-20036|-20032|-20026|-20002|-19990|-19986|-19982|-19976|-19805|-19784|-19775|-19774|-19763|-19756|-19751|-19746|-19741|-19739|-19728|-19725|-19715|-19540|-19531|-19525|-19515|-19500|-19484|-19479|-19467|-19289|-19288|-19281|-19275|-19270|-19263|-19261|-19249|-19243|-19242|-19238|-19235|-19227|-19224|-19218|-19212|-19038|-19023|-19018|-19006|-19003|-18996|-18977|-18961|-18952|-18783|-18774|-18773|-18763|-18756|-18741|-18735|-18731|-18722|-18710|-18697|-18696|-18526|-18518|-18501|-18490|-18478|-18463|-18448|-18447|-18446|-18239|-18237|-18231|-18220|-18211|-18201|-18184|-18183|-18181|-18012|-17997|-17988|-17970|-17964|-17961|-17950|-17947|-17931|-17928|-17922|-17759|-17752|-17733|-17730|-17721|-17703|-17701|-17697|-17692|-17683|-17676|-17496|-17487|-17482|-17468|-17454|-17433|-17427|-17417|-17202|-17185|-16983|-16970|-16942|-16915|-16733|-16708|-16706|-16689|-16664|-16657|-16647|-16474|-16470|-16465|-16459|-16452|-16448|-16433|-16429|-16427|-16423|-16419|-16412|-16407|-16403|-16401|-16393|-16220|-16216|-16212|-16205|-16202|-16187|-16180|-16171|-16169|-16158|-16155|-15959|-15958|-15944|-15933|-15920|-15915|-15903|-15889|-15878|-15707|-15701|-15681|-15667|-15661|-15659|-15652|-15640|-15631|-15625|-15454|-15448|-15436|-15435|-15419|-15416|-15408|-15394|-15385|-15377|-15375|-15369|-15363|-15362|-15183|-15180|-15165|-15158|-15153|-15150|-15149|-15144|-15143|-15141|-15140|-15139|-15128|-15121|-15119|-15117|-15110|-15109|-14941|-14937|-14933|-14930|-14929|-14928|-14926|-14922|-14921|-14914|-14908|-14902|-14894|-14889|-14882|-14873|-14871|-14857|-14678|-14674|-14670|-14668|-14663|-14654|-14645|-14630|-14594|-14429|-14407|-14399|-14384|-14379|-14368|-14355|-14353|-14345|-14170|-14159|-14151|-14149|-14145|-14140|-14137|-14135|-14125|-14123|-14122|-14112|-14109|-14099|-14097|-14094|-14092|-14090|-14087|-14083|-13917|-13914|-13910|-13907|-13906|-13905|-13896|-13894|-13878|-13870|-13859|-13847|-13831|-13658|-13611|-13601|-13406|-13404|-13400|-13398|-13395|-13391|-13387|-13383|-13367|-13359|-13356|-13343|-13340|-13329|-13326|-13318|-13147|-13138|-13120|-13107|-13096|-13095|-13091|-13076|-13068|-13063|-13060|-12888|-12875|-12871|-12860|-12858|-12852|-12849|-12838|-12831|-12829|-12812|-12802|-12607|-12597|-12594|-12585|-12556|-12359|-12346|-12320|-12300|-12120|-12099|-12089|-12074|-12067|-12058|-12039|-11867|-11861|-11847|-11831|-11798|-11781|-11604|-11589|-11536|-11358|-11340|-11339|-11324|-11303|-11097|-11077|-11067|-11055|-11052|-11045|-11041|-11038|-11024|-11020|-11019|-11018|-11014|-10838|-10832|-10815|-10800|-10790|-10780|-10764|-10587|-10544|-10533|-10519|-10331|-10329|-10328|-10322|-10315|-10309|-10307|-10296|-10281|-10274|-10270|-10262|-10260|-10256|-10254';
$key = explode('|', $k);
$val = explode('|', $v);
$py_arr = array_combine($key, $val);
arsort($py_arr);
return $py_arr;
}
}
/*
var_dump(0xE0);
for($i=0; $i<=255; $i++) {
var_dump("$i :". chr($i));
}
*/
var_dump(pinyin::utf8_to('PHP漢字轉拼音類'));
var_dump(pinyin::utf8_to('GB2312標准共收錄6763個漢字，不在范圍內的漢字是無法轉換，如：中國前總理朱镕基的“镕”字。'));
var_dump(pinyin::utf8_to('`1234567890-=QWERTYUIOP[]ASDFGHJKL;ZXCVBNM,./abcdefghijklmnopqrstuvwxyz'));
var_dump(pinyin::utf8_to('PHP漢字轉拼音類', 1));
var_dump(pinyin::utf8_to('GB2312標准共收錄6763個漢字，不在范圍內的漢字是無法轉換，如：中國前總理朱镕基的“镕”字。', 1));
var_dump(pinyin::utf8_to('`1234567890-=QWERTYUIOP[]ASDFGHJKL;ZXCVBNM,./abcdefghijklmnopqrstuvwxyz', 1));
var_dump(pinyin::to_first('PHP漢字轉拼音類'));
var_dump(pinyin::to_first('GB2312標准共收錄6763個漢字，不在范圍內的漢字是無法轉換，如：中國前總理朱镕基的“镕”字。'));
var_dump(pinyin::to_first('▂`1234567890-=QWERTYUIOP[]ASDFGHJKL;ZXCVBNM,./abcdefghijklmnopqrstuvwxyz'));
?>
方法二：根據拼音組合數組檢索
[php] view plaincopy
<?php
class pinyin{
private $d=array(
array("a",-20319),
array("ai",-20317),
array("an",-20304),
array("ang",-20295),
array("ao",-20292),
array("ba",-20283),
array("bai",-20265),
array("ban",-20257),
array("bang",-20242),
array("bao",-20230),
array("bei",-20051),
array("ben",-20036),
array("beng",-20032),
array("bi",-20026),
array("bian",-20002),
array("biao",-19990),
array("bie",-19986),
array("bin",-19982),
array("bing",-19976),
array("bo",-19805),
array("bu",-19784),
array("ca",-19775),
array("cai",-19774),
array("can",-19763),
array("cang",-19756),
array("cao",-19751),
array("ce",-19746),
array("ceng",-19741),
array("cha",-19739),
array("chai",-19728),
array("chan",-19725),
array("chang",-19715),
array("chao",-19540),
array("che",-19531),
array("chen",-19525),
array("cheng",-19515),
array("chi",-19500),
array("chong",-19484),
array("chou",-19479),
array("chu",-19467),
array("chuai",-19289),
array("chuan",-19288),
array("chuang",-19281),
array("chui",-19275),
array("chun",-19270),
array("chuo",-19263),
array("ci",-19261),
array("cong",-19249),
array("cou",-19243),
array("cu",-19242),
array("cuan",-19238),
array("cui",-19235),
array("cun",-19227),
array("cuo",-19224),
array("da",-19218),
array("dai",-19212),
array("dan",-19038),
array("dang",-19023),
array("dao",-19018),
array("de",-19006),
array("deng",-19003),
array("di",-18996),
array("dian",-18977),
array("diao",-18961),
array("die",-18952),
array("ding",-18783),
array("diu",-18774),
array("dong",-18773),
array("dou",-18763),
array("du",-18756),
array("duan",-18741),
array("dui",-18735),
array("dun",-18731),
array("duo",-18722),
array("e",-18710),
array("en",-18697),
array("er",-18696),
array("fa",-18526),
array("fan",-18518),
array("fang",-18501),
array("fei",-18490),
array("fen",-18478),
array("feng",-18463),
array("fo",-18448),
array("fou",-18447),
array("fu",-18446),
array("ga",-18239),
array("gai",-18237),
array("gan",-18231),
array("gang",-18220),
array("gao",-18211),
array("ge",-18201),
array("gei",-18184),
array("gen",-18183),
array("geng",-18181),
array("gong",-18012),
array("gou",-17997),
array("gu",-17988),
array("gua",-17970),
array("guai",-17964),
array("guan",-17961),
array("guang",-17950),
array("gui",-17947),
array("gun",-17931),
array("guo",-17928),
array("ha",-17922),
array("hai",-17759),
array("han",-17752),
array("hang",-17733),
array("hao",-17730),
array("he",-17721),
array("hei",-17703),
array("hen",-17701),
array("heng",-17697),
array("hong",-17692),
array("hou",-17683),
array("hu",-17676),
array("hua",-17496),
array("huai",-17487),
array("huan",-17482),
array("huang",-17468),
array("hui",-17454),
array("hun",-17433),
array("huo",-17427),
array("ji",-17417),
array("jia",-17202),
array("jian",-17185),
array("jiang",-16983),
array("jiao",-16970),
array("jie",-16942),
array("jin",-16915),
array("jing",-16733),
array("jiong",-16708),
array("jiu",-16706),
array("ju",-16689),
array("juan",-16664),
array("jue",-16657),
array("jun",-16647),
array("ka",-16474),
array("kai",-16470),
array("kan",-16465),
array("kang",-16459),
array("kao",-16452),
array("ke",-16448),
array("ken",-16433),
array("keng",-16429),
array("kong",-16427),
array("kou",-16423),
array("ku",-16419),
array("kua",-16412),
array("kuai",-16407),
array("kuan",-16403),
array("kuang",-16401),
array("kui",-16393),
array("kun",-16220),
array("kuo",-16216),
array("la",-16212),
array("lai",-16205),
array("lan",-16202),
array("lang",-16187),
array("lao",-16180),
array("le",-16171),
array("lei",-16169),
array("leng",-16158),
array("li",-16155),
array("lia",-15959),
array("lian",-15958),
array("liang",-15944),
array("liao",-15933),
array("lie",-15920),
array("lin",-15915),
array("ling",-15903),
array("liu",-15889),
array("long",-15878),
array("lou",-15707),
array("lu",-15701),
array("lv",-15681),
array("luan",-15667),
array("lue",-15661),
array("lun",-15659),
array("luo",-15652),
array("ma",-15640),
array("mai",-15631),
array("man",-15625),
array("mang",-15454),
array("mao",-15448),
array("me",-15436),
array("mei",-15435),
array("men",-15419),
array("meng",-15416),
array("mi",-15408),
array("mian",-15394),
array("miao",-15385),
array("mie",-15377),
array("min",-15375),
array("ming",-15369),
array("miu",-15363),
array("mo",-15362),
array("mou",-15183),
array("mu",-15180),
array("na",-15165),
array("nai",-15158),
array("nan",-15153),
array("nang",-15150),
array("nao",-15149),
array("ne",-15144),
array("nei",-15143),
array("nen",-15141),
array("neng",-15140),
array("ni",-15139),
array("nian",-15128),
array("niang",-15121),
array("niao",-15119),
array("nie",-15117),
array("nin",-15110),
array("ning",-15109),
array("niu",-14941),
array("nong",-14937),
array("nu",-14933),
array("nv",-14930),
array("nuan",-14929),
array("nue",-14928),
array("nuo",-14926),
array("o",-14922),
array("ou",-14921),
array("pa",-14914),
array("pai",-14908),
array("pan",-14902),
array("pang",-14894),
array("pao",-14889),
array("pei",-14882),
array("pen",-14873),
array("peng",-14871),
array("pi",-14857),
array("pian",-14678),
array("piao",-14674),
array("pie",-14670),
array("pin",-14668),
array("ping",-14663),
array("po",-14654),
array("pu",-14645),
array("qi",-14630),
array("qia",-14594),
array("qian",-14429),
array("qiang",-14407),
array("qiao",-14399),
array("qie",-14384),
array("qin",-14379),
array("qing",-14368),
array("qiong",-14355),
array("qiu",-14353),
array("qu",-14345),
array("quan",-14170),
array("que",-14159),
array("qun",-14151),
array("ran",-14149),
array("rang",-14145),
array("rao",-14140),
array("re",-14137),
array("ren",-14135),
array("reng",-14125),
array("ri",-14123),
array("rong",-14122),
array("rou",-14112),
array("ru",-14109),
array("ruan",-14099),
array("rui",-14097),
array("run",-14094),
array("ruo",-14092),
array("sa",-14090),
array("sai",-14087),
array("san",-14083),
array("sang",-13917),
array("sao",-13914),
array("se",-13910),
array("sen",-13907),
array("seng",-13906),
array("sha",-13905),
array("shai",-13896),
array("shan",-13894),
array("shang",-13878),
array("shao",-13870),
array("she",-13859),
array("shen",-13847),
array("sheng",-13831),
array("shi",-13658),
array("shou",-13611),
array("shu",-13601),
array("shua",-13406),
array("shuai",-13404),
array("shuan",-13400),
array("shuang",-13398),
array("shui",-13395),
array("shun",-13391),
array("shuo",-13387),
array("si",-13383),
array("song",-13367),
array("sou",-13359),
array("su",-13356),
array("suan",-13343),
array("sui",-13340),
array("sun",-13329),
array("suo",-13326),
array("ta",-13318),
array("tai",-13147),
array("tan",-13138),
array("tang",-13120),
array("tao",-13107),
array("te",-13096),
array("teng",-13095),
array("ti",-13091),
array("tian",-13076),
array("tiao",-13068),
array("tie",-13063),
array("ting",-13060),
array("tong",-12888),
array("tou",-12875),
array("tu",-12871),
array("tuan",-12860),
array("tui",-12858),
array("tun",-12852),
array("tuo",-12849),
array("wa",-12838),
array("wai",-12831),
array("wan",-12829),
array("wang",-12812),
array("wei",-12802),
array("wen",-12607),
array("weng",-12597),
array("wo",-12594),
array("wu",-12585),
array("xi",-12556),
array("xia",-12359),
array("xian",-12346),
array("xiang",-12320),
array("xiao",-12300),
array("xie",-12120),
array("xin",-12099),
array("xing",-12089),
array("xiong",-12074),
array("xiu",-12067),
array("xu",-12058),
array("xuan",-12039),
array("xue",-11867),
array("xun",-11861),
array("ya",-11847),
array("yan",-11831),
array("yang",-11798),
array("yao",-11781),
array("ye",-11604),
array("yi",-11589),
array("yin",-11536),
array("ying",-11358),
array("yo",-11340),
array("yong",-11339),
array("you",-11324),
array("yu",-11303),
array("yuan",-11097),
array("yue",-11077),
array("yun",-11067),
array("za",-11055),
array("zai",-11052),
array("zan",-11045),
array("zang",-11041),
array("zao",-11038),
array("ze",-11024),
array("zei",-11020),
array("zen",-11019),
array("zeng",-11018),
array("zha",-11014),
array("zhai",-10838),
array("zhan",-10832),
array("zhang",-10815),
array("zhao",-10800),
array("zhe",-10790),
array("zhen",-10780),
array("zheng",-10764),
array("zhi",-10587),
array("zhong",-10544),
array("zhou",-10533),
array("zhu",-10519),
array("zhua",-10331),
array("zhuai",-10329),
array("zhuan",-10328),
array("zhuang",-10322),
array("zhui",-10315),
array("zhun",-10309),
array("zhuo",-10307),
array("zi",-10296),
array("zong",-10281),
array("zou",-10274),
array("zu",-10270),
array("zuan",-10262),
array("zui",-10260),
array("zun",-10256),
array("zuo",-10254)
);
public function get_pinyin($str,$charset="utf-8"){
if($charset!="gb2312"){
$str=$this->set_char($str,$charset,"gb2312");
$str=$this->c($str);
$str=$this->set_char($str,"gb2312",$charset);
}else{
$str=$this->c($str);
}
return $str;
}
private function set_char($str,$charset="utf-8",$charset_out="gb2312"){
if(function_exists('iconv')){
$str=iconv($charset,$charset_out,$str);
}elseif(function_exists("mb_convert_encoding")){
$str=mb_convert_encoding($str,$charset_out,$charset);
}
return $str;
}
private function g($num){
if($num>0 && $num<160){
return chr($num);
}elseif($num<-20319||$num>-10247){
return "";
}else{
for($i=count($this->d)-1;$i>=0;$i--){
if($this->d[$i][1]<=$num) break;
}
return $this->d[$i][0];
}
}
private function c($str){
$ret="";
for($i=0;$i<strlen($str);$i++){
$p=ord(substr($str,$i,1));
if($p>160){
$q=ord(substr($str,++$i,1));
$p=$p*256+$q-65536;
}
$ret.=$this->g($p);
}
return $ret;
}
}
function get_pinyin($str,$charset="utf-8"){
$pinyin=new pinyin();
return $pinyin->get_pinyin($str,$charset);
}
?>
PHP取得漢字(中文)：
[php] view plaincopy
function getChinese($str,$charset='utf8'){
if($charset=='gb2312'){
if(!preg_match_all("/^[".chr(0xa1)."-".chr(0xff)."]+/",$str,$match)){
return false;
}
return implode('',$match[0]);
}
//
if($charset=='utf8'){
if(!preg_match_all("/[\x{4e00}-\x{9fa5}]+/u",$str,$match)){
return false;
}
return implode('',$match[0]);
}
return false;
}
PHP取得漢字拼音字母數組標點：
[php] view plaincopy
//取得字符串中漢字字符數字下劃線和短連接符、逗號、句號、分號、冒號、書名號、問號等非特殊字符
function getChinese($str,$charset='utf8'){
if($charset=='gb2312'){
if(!preg_match_all("/^[".chr(0xa1)."-".chr(0xff)."A-Za-z0-9_\-\,\。\，\.\；\;\：\:\《\》\？\?\%\%\！\!\~\~]+/",$str,$match)){
return false;
}
return implode('',$match[0]);
}
if($charset=='utf8'){
if(!preg_match_all("/[\x{4e00}-\x{9fa5}A-Za-z0-9_\-\,\。\，\.\；\;\：\:\《\》\？\?\%\%\！\!\~\~]+/u",$str,$match)){
return false;
}
return implode('',$match[0]);
}
return false;
}
