精華 帝國PHP系統(tǒng)調(diào)用當(dāng)前欄目的TAG或指定的TAG

總結(jié)為4種方法：

用法1、

[e:loop={"select DISTINCT([!db.pre!]enewstags.tagname),[!db.pre!]enewstags.tagid,[!db.pre!]enewstags.num from [!db.pre!]enewstags inner join [!db.pre!]enewstagsdata on [!db.pre!]enewstags.tagid = [!db.pre!]enewstagsdata.tagid where [!db.pre!]enewstagsdata.classid = 25 order by [!db.pre!]enewstags.num DESC limit 30",0,24}]
<a href='http://m.viagraonlinego.com/<?=$public_r['newsurl']?>e/tags/?tagname=<?=$bqr['tagname']?>' title='<?=$bqr['num']?>個(gè)'><?=$bqr['tagname']?>(<?=$bqr['num']?>)</a>
[/e:loop]

用法2、（和上面的相同，只是sql格式有稍微不同）

[e:loop={"select a.tagname,a.num,b.tagid from [!db.pre!]enewstags a,[!db.pre!]enewstagsdata b where a.tagid=b.tagid and classid=34 group by tagid order by num desc limit 40",40,24,0}]
<a href='http://m.viagraonlinego.com/<?=$public_r['newsurl']?>e/tags/?tagname=<?=$bqr['tagname']?>' title='<?=$bqr['num']?>個(gè)'><?=$bqr['tagname']?>(<?=$bqr['num']?>)</a>
[/e:loop]

用法3、（和上面的相同，只是sql格式有稍微不同）

[e:loop={"select a.*,b.* from [!db.pre!]enewstags a,[!db.pre!]enewstagsdata b where a.tagid=b.tagid and classid=25 group by b.tagid order by a.num desc limit 40",40,24,0}]
<a href='http://m.viagraonlinego.com/<?=$public_r['newsurl']?>e/tags/?tagname=<?=$bqr['tagname']?>' title='<?=$bqr['num']?>個(gè)'><?=$bqr['tagname']?>(<?=$bqr['num']?>)</a>
[/e:loop]

用法4、（和上面的相同，只是sql格式有稍微不同）

[e:loop={"select a.*,b.* from [!db.pre!]enewstags a LEFT JOIN [!db.pre!]enewstagsdata b ON a.tagid=b.tagid where classid=25 group by b.tagid order by a.num desc limit 100",0,24,0}]
<a href='http://m.viagraonlinego.com/<?=$public_r['newsurl']?>e/tags/?tagname=<?=$bqr['tagname']?>' title='<?=$bqr['num']?>個(gè)'><?=$bqr['tagname']?>(<?=$bqr['num']?>)</a>
[/e:loop]

注釋：classid = 25 為欄目ID必須為終極欄目

注意當(dāng)tag數(shù)據(jù)很多的時(shí)候使用此方法會(huì)比較消耗系統(tǒng)資源，應(yīng)視情況少用或優(yōu)化使用。

1、上面的為調(diào)用單個(gè)欄目

2、多個(gè)欄目時(shí)，修改classid = 25 為 classid in(25,35,36,37)

3、調(diào)用當(dāng)前欄目（列表、內(nèi)容通用）：把? classid = 25? ?替換為 ??classid='$GLOBALS[navclassid]'