php常用一些方法积累

//二维数组根据键值排序
        public static function array_sort($arr, $keys, $type = 'asc') {
            $keysvalue = $new_array = array();
            foreach ($arr as $k => $v) {
                $keysvalue[$k] = $v[$keys];
            }
            if ($type == 'asc') {
                asort($keysvalue);
            } else {
                arsort($keysvalue);
            }
            reset($keysvalue);
            foreach ($keysvalue as $k => $v) {
                $new_array[$k] = $arr[$k];
            }
            return $new_array;
        }
        //获取英文首字母
        public static function engCode($zh){
            $ret = "";
            $s1 = iconv("gb2312","UTF-8", $zh);
            $s2 = iconv("gb2312","UTF-8", $s1);
            if($s2 == $zh){$zh = $s1;}
            for($i = 0; $i < mb_strlen($zh,'UTF-8'); $i++){
                $s1 = mb_substr($zh,$i,1,'UTF-8');
                $p = ord($s1);
                if($p > 160){
                    $s2 = mb_substr($zh,$i,1,'UTF-8');
                    $ret .= self::getfirstchar($s2);
                }else{
                    $ret .= $s1;
                }
            }
            return $ret;
    
        }
    
    
        //获取汉字首字母拼音
        public static function getfirstchar($s0){
            $fchar = ord($s0{0});
            if($fchar >= ord("A") and $fchar <= ord("z") )return strtoupper($s0{0});
            $s1 = iconv("UTF-8","gb2312", $s0);
            $s2 = iconv("gb2312","UTF-8", $s1);
            if($s2 == $s0){$s = $s1;}else{$s = $s0;}
            $asc = ord($s{0}) * 256 + ord($s{1}) - 65536;
            if($asc >= -20319 and $asc <= -20284) return "A";
            if($asc >= -20283 and $asc <= -19776) return "B";
            if($asc >= -19775 and $asc <= -19219) return "C";
            if($asc >= -19218 and $asc <= -18711) return "D";
            if($asc >= -18710 and $asc <= -18527) return "E";
            if($asc >= -18526 and $asc <= -18240) return "F";
            if($asc >= -18239 and $asc <= -17923) return "G";
            if($asc >= -17922 and $asc <= -17418) return "I";
            if($asc >= -17417 and $asc <= -16475) return "J";
            if($asc >= -16474 and $asc <= -16213) return "K";
            if($asc >= -16212 and $asc <= -15641) return "L";
            if($asc >= -15640 and $asc <= -15166) return "M";
            if($asc >= -15165 and $asc <= -14923) return "N";
            if($asc >= -14922 and $asc <= -14915) return "O";
            if($asc >= -14914 and $asc <= -14631) return "P";
            if($asc >= -14630 and $asc <= -14150) return "Q";
            if($asc >= -14149 and $asc <= -14091) return "R";
            if($asc >= -14090 and $asc <= -13319) return "S";
            if($asc >= -13318 and $asc <= -12839) return "T";
            if($asc >= -12838 and $asc <= -12557) return "W";
            if($asc >= -12556 and $asc <= -11848) return "X";
            if($asc >= -11847 and $asc <= -11056) return "Y";
            if($asc >= -11055 and $asc <= -10247) return "Z";
            return null;
        }

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php常用一些方法积累

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