前言：使用场景：地区入库字母排序，姓名入库字母排序。
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/** * User: 謝雲虎 * DateTime: 2021/11/9 16:41 * Desc:循环取出字符串的首字母 * @param $str * @return string */function strToArray($str) $cind = 0; $arr_cont = array(); for ($i = 0; $i strlen($str); $i++) if (strlen(substr($str, $cind, 1)) 0) if (ord(substr($str, $cind, 1)) 192) //如果为英文则取1个字节 if (substr($str, $cind, 1) != " ") array_push($arr_cont, substr($str, $cind, 1)); $cind++; elseif(ord(substr($str, $cind, 1)) 224) array_push($arr_cont, substr($str, $cind, 2)); $cind+=2; else array_push($arr_cont, substr($str, $cind, 3)); $cind+=3; $str = ''; foreach ($arr_cont as $value) $str .= getFirstCharter($value); return $str; /** * User: 謝雲虎 * DateTime: 2021/11/9 16:31 * Desc:获取中文字符拼音首字母 * @param $str * @return null|string */function getFirstCharter($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; 
