function getFirstCharter($str){
if(empty($str)){return '';}
$fchar=ord($str{0});
if($fchar>=ord('A')&&$fchar<=ord('z')) return strtoupper($str{0});
$s1=iconv('UTF-8','gb2312',$str);
$s2=iconv('gb2312','UTF-8',$s1);
$s=$s2==$str?$s1:$str;
$asc=ord($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 null;
}
公司同事整理的类,挺实用的.相信拿出来分享下他不会介意的O(∩_∩)O.不过如果首字母是数字或英文会有些问题.
/**
* Helper_Spell 汉字拼音首字母工具类
*
* @category Helper
* @package Helper_Spell
* @author Lancer <lancer.he@gmail.com>
* @version 1.0
* @see Translation_Big2gb
*/
class Helper_Spell {
/**
* $_pinyins
* @var array
* @access private
*/
private $_pinyins = array(
176161 => 'A',
176197 => 'B',
178193 => 'C',
180238 => 'D',
182234 => 'E',
183162 => 'F',
184193 => 'G',
185254 => 'H',
187247 => 'J',
191166 => 'K',
192172 => 'L',
194232 => 'M',
196195 => 'N',
197182 => 'O',
197190 => 'P',
198218 => 'Q',
200187 => 'R',
200246 => 'S',
203250 => 'T',
205218 => 'W',
206244 => 'X',
209185 => 'Y',
212209 => 'Z',
215249 => 'Z',
);
/**
* $_charset
* @var string
* @access private
*/
private $_charset = null;
/**
* __construct 构造函数, 指定需要的编码 default: utf-8 支持utf-8, gb2312
*
* @param unknown_type $charset
*/
public function __construct( $charset = 'utf-8' ) {
$this->_charset = $charset;
}
/**
* getInitialsFirst 返回首个汉字的拼音
*
* @access public
* @static
* @param string $str
* @return string
* @example Helper_Spell::getInitialsFirst('我的爱'); => w
*/
public static function getInitialsFirst( $str, $charset = 'utf-8' ) {
$chars = array(
'A','B','C','D','E','F',
'G','H','I','J','K','L',
'M','N','O','P','Q','R',
'S','T','U','V','W','X',
'Y','Z');
$string = self::getInitials( $str );
$length = strlen($string);
for($i=0; $i < $length; $i++) {
if ( in_array( $string{$i}, $chars ) ) {
return $string{$i};
}
}
return '*';
}
/**
* getInitials 返回拼音组合
*
* @access public
* @static
* @param string $str
* @return string
* @example Helper_Spell::getInitials('我的爱'); => wda
*/
public static function getInitials( $str, $charset = 'utf-8' ) {
$instance = new Helper_Spell( $charset );
return $instance->_getInitials( $str );
}
/**
* _getInitials 获取中文字串的拼音首字符
* 注：英文的字串：不变返回(包括数字) eg .abc123 => abc123
* 中文字符串：返回拼音首字符 eg. 王小明 => WXM
* 中英混合串: 返回拼音首字符和英文 eg. 我i我j => WIWJ
*
* @access private
* @param string $str
* @return string
*/
private function _getInitials( $str, $translation=TRUE ){
if ( empty($str) ) return '';
if ( $this->_isAscii($str[0]) && $this->_isAsciis( $str ))
return $str;
if ( $translation )
$str = Translation_Big2gb::big2gb( $str );
$result = array();
if ( $this->_charset == 'utf-8' ){
//IGNORE很重要，加上这个就可以是ICONV()函数忽略错误，继续执行
$str = iconv( 'utf-8', 'gbk//IGNORE', $str );
}
$words = $this->_cutWord( $str );
foreach ( $words AS $word ) {
if ( $this->_isAscii($word) ) {//非中文
$result[] = $word;
continue;
}
$code = ( ord(substr($word,0,1)) ) * 1000 + (ord(substr($word,1,1)));
//获取拼音首字母A--Z
if ( ($i = $this->_search($code)) != -1 ){
$result[] = $this->_pinyins[$i];
}
}
return strtoupper(implode('', $result));
}
/**
* _msubstr 获取中文字符串
*
* @access private
* @param string $str
* @param int $start
* @param int $len
* @return string
*/
private function _msubstr ($str, $start, $len) {
$start = $start * 2;
$len = $len * 2;
$strlen = strlen($str);
$result = '';
for ( $i = 0; $i < $strlen; $i++ ) {
if ( $i >= $start && $i < ($start + $len) ) {
if ( ord(substr($str, $i, 1)) > 129 ) $result .= substr($str, $i, 2);
else $result .= substr($str, $i, 1);
}
if ( ord(substr($str, $i, 1)) > 129 ) $i++;
}
return $result;
}
/**
* _cutWord 字符串切分为数组 (汉字或者一个字符为单位)
*
* @access private
* @param string $str
* @return array
*/
private function _cutWord( $str ) {
$words = array();
while ( $str != "" ) {
if ( $this->_isAscii($str) ) {//非中文
$words[] = $str[0];
$str = substr( $str, strlen($str[0]) );
} else {
$word = $this->_msubstr( $str, 0, 1 );
$words[] = $word;
$str = substr( $str, strlen($word) );
}
}
return $words;
}
/**
* _isAscii 判断字符是否是ascii字符
*
* @access private
* @param string $char
* @return bool
*/
private function _isAscii( $char ) {
return ( ord( substr($char,0,1) ) < 160 );
}
/**
* _isAsciis 判断字符串前3个字符是否是ascii字符
*
* @access private
* @param string $str
* @return bool
*/
private function _isAsciis( $str ) {
$len = strlen($str) >= 3 ? 3: 2;
$chars = array();
for( $i = 1; $i < $len -1; $i++ ){
$chars[] = $this->_isAscii( $str[$i] ) ? 'yes':'no';
}
$result = array_count_values( $chars );
if ( empty($result['no']) ){
return true;
}
return false;
}
/**
* _getChar 通过ASC码返回字母或者数字
*
* @access private
* @param string $ascii
* @return string
*/
private function _getChar( $ascii ){
if ( $ascii >= 48 && $ascii <= 57 ) {
return chr($ascii); //数字
} elseif ( $ascii>=65 && $ascii<=90 ) {
return chr($ascii); // A--Z
} elseif ($ascii>=97 && $ascii<=122 ) {
return chr($ascii-32); // a--z
} else {
return '~'; //其他
}
}
/**
* _search 查找需要的汉字内码(gb2312) 对应的拼音字符(二分法)
*
* @access private
* @param int $code
* @return int
*/
private function _search( $code ) {
$data = array_keys($this->_pinyins);
$lower = 0;
$upper = sizeof($data)-1;
// 排除非一级汉字
if ($code < $data[0] || $code > $data[23]) return -1;
for (;;) {
if ( $lower > $upper ){
return $data[$lower-1];
}
$middle = (int) round(($lower + $upper) / 2);
if ( !isset($data[$middle]) ) {
return -1;
}
if ( $data[$middle] < $code ){
$lower = (int)$middle + 1;
} else if ( $data[$middle] == $code ) {
return $data[$middle];
} else {
$upper = (int)$middle - 1;
}
}// end for
}
}