<?php
/**
* 首字母排序类
*/
class First_letter_sort {
/**
* 取汉字的第一个字的首字母
* @DateTime 2016-09-14T17:24:29+0800
* @param string $str
*/
public function first_charter($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 \'#\';
}
/**
* 组装字母排序数组
* @DateTime 2016-09-14T17:45:10+0800
* @param array $array_list
* @param string $field_name
* @return
*/
public function letter_order($array_list,$field_name){
$letterArray=array();
if(!empty($array_list)){
foreach ($array_list as $key=>$value){
$letter=$this->first_charter($value["$field_name"]);
$array_list[$key][\'letter\']=$letter;
}
usort($array_list,function($a,$b){
$al=$a[\'letter\'];
$bl=$b[\'letter\'];
if($al==$bl)return 0;
return($al<$bl)?-1:1;
});
foreach ($array_list as $key => $value) {
$letter=$value[\'letter\'];
unset($value[\'letter\']);
$letterArray[$letter][\'letter\']=$letter;
$letterArray[$letter][\'letter_order\'][]=$value;
}
}
return array_values($letterArray);
}
}?>