PHP常用函数之获取汉字首字母功能示例

吾爱主题阅读：123 2021-09-09 16:15:00 评论：0

本文实例讲述了PHP常用函数之获取汉字首字母功能。分享给大家供大家参考，具体如下：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 //获取汉字的首字母 function getFirstCharters( $str ) { if ( empty ( $str )) { return '' ; } //取出参数字符串中的首个字符 $temp_str = substr ( $str ,0,1); if (ord( $temp_str ) > 127){ $str = substr ( $str ,0,3); } else { $str = $temp_str ; $fchar = ord( $str {0}); if ( $fchar >= ord( 'A' ) && $fchar <= ord( 'z' )){ return strtoupper ( $temp_str ); } else { return null; } } $s1 = iconv( 'UTF-8' , 'gb2312//IGNORE' , $str ); if ( empty ( $s1 )){ return null; } $s2 = iconv( 'gb2312' , 'UTF-8' , $s1 ); if ( empty ( $s2 )){ return null; } $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 rare_words( $asc ); } //百家姓中的生僻字 function rare_words( $asc = '' ){ $rare_arr = array ( -3652=> array ( 'word' => "窦" , 'first_char' => 'D' ), -8503=> array ( 'word' => "奚" , 'first_char' => 'X' ), -9286=> array ( 'word' => "酆" , 'first_char' => 'F' ), -7761=> array ( 'word' => "岑" , 'first_char' => 'C' ), -5128=> array ( 'word' => "滕" , 'first_char' => 'T' ), -9479=> array ( 'word' => "邬" , 'first_char' => 'W' ), -5456=> array ( 'word' => "臧" , 'first_char' => 'Z' ), -7223=> array ( 'word' => "闵" , 'first_char' => 'M' ), -2877=> array ( 'word' => "裘" , 'first_char' => 'Q' ), -6191=> array ( 'word' => "缪" , 'first_char' => 'M' ), -5414=> array ( 'word' => "贲" , 'first_char' => 'B' ), -4102=> array ( 'word' => "嵇" , 'first_char' => 'J' ), -8969=> array ( 'word' => "荀" , 'first_char' => 'X' ), -4938=> array ( 'word' => "於" , 'first_char' => 'Y' ), -9017=> array ( 'word' => "芮" , 'first_char' => 'R' ), -2848=> array ( 'word' => "羿" , 'first_char' => 'Y' ), -9477=> array ( 'word' => "邴" , 'first_char' => 'B' ), -9485=> array ( 'word' => "隗" , 'first_char' => 'K' ), -6731=> array ( 'word' => "宓" , 'first_char' => 'M' ), -9299=> array ( 'word' => "郗" , 'first_char' => 'X' ), -5905=> array ( 'word' => "栾" , 'first_char' => 'L' ), -4393=> array ( 'word' => "钭" , 'first_char' => 'T' ), -9300=> array ( 'word' => "郜" , 'first_char' => 'G' ), -8706=> array ( 'word' => "蔺" , 'first_char' => 'L' ), -3613=> array ( 'word' => "胥" , 'first_char' => 'X' ), -8777=> array ( 'word' => "莘" , 'first_char' => 'S' ), -6708=> array ( 'word' => "逄" , 'first_char' => 'P' ), -9302=> array ( 'word' => "郦" , 'first_char' => 'L' ), -5965=> array ( 'word' => "璩" , 'first_char' => 'Q' ), -6745=> array ( 'word' => "濮" , 'first_char' => 'P' ), -4888=> array ( 'word' => "扈" , 'first_char' => 'H' ), -9309=> array ( 'word' => "郏" , 'first_char' => 'J' ), -5428=> array ( 'word' => "晏" , 'first_char' => 'Y' ), -2849=> array ( 'word' => "暨" , 'first_char' => 'J' ), -7206=> array ( 'word' => "阙" , 'first_char' => 'Q' ), -4945=> array ( 'word' => "殳" , 'first_char' => 'S' ), -9753=> array ( 'word' => "夔" , 'first_char' => 'K' ), -10041=> array ( 'word' => "厍" , 'first_char' => 'S' ), -5429=> array ( 'word' => "晁" , 'first_char' => 'C' ), -2396=> array ( 'word' => "訾" , 'first_char' => 'Z' ), -7205=> array ( 'word' => "阚" , 'first_char' => 'K' ), -10049=> array ( 'word' => "乜" , 'first_char' => 'N' ), -10015=> array ( 'word' => "蒯" , 'first_char' => 'K' ), -3133=> array ( 'word' => "竺" , 'first_char' => 'Z' ), -6698=> array ( 'word' => "逯" , 'first_char' => 'L' ), -9799=> array ( 'word' => "俟" , 'first_char' => 'Q' ), -6749=> array ( 'word' => "澹" , 'first_char' => 'T' ), -7220=> array ( 'word' => "闾" , 'first_char' => 'L' ), -10047=> array ( 'word' => "亓" , 'first_char' => 'Q' ), -10005=> array ( 'word' => "仉" , 'first_char' => 'Z' ), -3417=> array ( 'word' => "颛" , 'first_char' => 'Z' ), -6431=> array ( 'word' => "驷" , 'first_char' => 'S' ), -7226=> array ( 'word' => "闫" , 'first_char' => 'Y' ), -9293=> array ( 'word' => "鄢" , 'first_char' => 'Y' ), -6205=> array ( 'word' => "缑" , 'first_char' => 'G' ), -9764=> array ( 'word' => "佘" , 'first_char' => 'S' ), -9818=> array ( 'word' => "佴" , 'first_char' => 'N' ), -9509=> array ( 'word' => "谯" , 'first_char' => 'Q' ), -3122=> array ( 'word' => "笪" , 'first_char' => 'D' ), -9823=> array ( 'word' => "佟" , 'first_char' => 'T' ), ); if ( array_key_exists ( $asc , $rare_arr ) && $rare_arr [ $asc ][ 'first_char' ]){ return $rare_arr [ $asc ][ 'first_char' ] ; } else { return null; } } //测试： echo getFirstCharters( '窦' );