做一个主题的时候遇到的问题，需要将TAG按照首字母分类进行排序。百度查到一组基于php和mysql的代码很好用，将代码分享于此，存档备案。请忽略效率之类的东西，这玩意儿要效率就没技巧。
function Nobird_GET_PYTAG($re){ // eg: Nobird_GET_PYTAG('B');
global $zbp;
$shouzimu=strtoupper($re); //传过来的参数转大写
$array = $zbp->GetTagList('','',array('tag_Count'=>'DESC'),'','');
$str='';
$i=0;
foreach($array as $tag){ //对每一列进行判断{$tag->Name}
$panduan=ff_letter_first($tag->Name);//调用下面的方法
if($panduan==$shouzimu){ //如果判断的值==首字母
print_r($tag->Name); //打印出来 debug
$str.=$tag->Name;
$i++;if ($i==2){break;} //限制每个首字母最多查询量
}
}
@file_put_contents($zbp->usersdir . 'theme/'.$GLOBALS['Nobird_Theme_Name'].'/include/'.$GLOBALS['Nobird_Theme_Name'].'_PYTAG.php', $str,FILE_APPEND);
//输出到文本
}
//生成字母前缀
function ff_letter_first($s0){
$firstchar_ord=ord(strtoupper($s0{0}));
if (($firstchar_ord>=65 and $firstchar_ord<=91)or($firstchar_ord>=48 and $firstchar_ord<=57)) return $s0{0};
$s=iconv("UTF-8","gb2312", $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 $asc<=-17418)return "H";
if($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 0;//null
}不得不说ZBP的Getlist系列很好用(虽然我还没太用懂)。
转载请注明：鸟儿博客 » Z-Blog PHP 通过首字母查询TAG