常用php函数，来自互联网

来源：互联网发布：加盟淘宝母婴店编辑：程序博客网时间：2024/06/05 15:17
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    }}
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