</a>
這(zhè)個(gè)是(shì)js部分α↕€↓(fēn)
獲取關注人(rén)數(shù)的(de)∏£✘內(nèi)容，字符串轉換整型，獲得(de)當α¶₩Ω前關注人(rén)數(shù)
tot=$('.↕©tot').html();
tot=pars♦↔'eInt(tot);
var x;
$('.guan').click(function(){
&nbs↓≈₽p; //獲取當前關注标簽的(de)class ，判斷以✔γ後分(fēn)别關注跟取消關注
>∏§β //我這(zhè£)個(gè)是(shì)一(yī)個(gè)課程網站(zhàn)的(de)♥₹↔關注 需要(yào)攜帶課程id
≥ xx=$(thisλ♥÷).find('b').attr('class');
<©π<; //未關注則進行(xíng)關注
∑α"; if(xx=='guanzhu_startαλ←•'){
&nb≈§£ sp; $.¶post("{:U('guan')}",&★♥{'courseid':courseid},function(r){
&nb€∏δ∞sp; &n&₩₹bsp; 根據後面的(de)php函♣•數(shù)function guan()操作(zuò)數(shù'★¶∞)據庫，當關注成功是(shì)返回1；前台獲取到(dào)1以後給當前關注©₩÷¥人(rén)數(shù)加1；
&nbs≥Ωαp; if(↔®r==1){
≈±$ ←♥ ; £• if(x){
&nbδ">sp; &nb"✔§βsp; ← $('.tot').html((x+1)+&qu<> ot;人(rén)");
&nb₹™♣®sp; > ±≠ &nbsγ≥p;
&nb♥✔sp; ≥γ; &nbsε•♠p; x=x+1₹;
↓§≥ &nbs φp; }else{
&≤≠₩αnbsp; ♣λ₩₩ $♠$→; $('.tot').html >↓((tot+1)+"人(rén)");
∏×↔÷ ™§; ±★
&nb™✘sp; ♣≈'€; x=tot+1;
&nb$"sp; &nbλΩ↑sp; ®> Ω;
α∞≠ &nbsπ®'p; }
&nb<δ✘±sp;   &n×ε÷≥bsp;
×β §€& }
&nbs↔p; });
&¥¥Ωnbsp; //已關注就(j'"iù)取消關注
× 根據後面的(de)php函數(''₩shù)function qu()操作(zuò)數(shù)據庫§☆，當取消關注成功是(shì)返回1；前台獲取 >ε®到(dào)1以後給當前關注人(rén)數(shù)減1；
★δ$ }else if(xx==↑®®₩'guanzhu_down'){
"←≥∑ ¥ ↔$.post("{:U('qu')}"≤→§;,{'courseid':courseid},function(r)™&{
&nbsΩ¥☆•p; ±♥ if(r==1){
&" &nbs≠♣≥≥p; if(x){≈π÷
λ♦₩∏; ; &n♣♥★bsp; $('.tot').html((x-1¶γ₹)+"人(rén)");
&n↑"£bsp; &n®φbsp; ₩☆∑ x=x-1;
&nbs•απΩp; &© }else{
&nbs¥€p; Ω←₹ &¥ ¥nbsp; $('.tot₽♠').html((tot-1)+&quo"¥>t;人(rén)");
↕π ; ≥>π δ≤™♣
<♠; £εδ∏ &×≈nbsp; x=tot &-1;
£✔ &nb±★¶sp; &σ><γnbsp;
π← &nbs≠☆p; &nb←¶sp; }
&n§ ≠bsp; ₽®;
&₽↕$nbsp; ε® ₹±}
&n £↕§bsp; )};
public function guan(){
σ≥πφ $courseid=$_POST['courseid'];/∏'/從(cóng)前台獲取的(de)課程id
'$userid=$_SESSION['userid'];≤>//$_SESSION中獲取用(yòng)戶id
ελ$time=time();
δ≥ $obj=M();
增加關注
↑ $sql="insert into weixin_↓<↑follow (userid,courseid,t←σαime) values('$userid',≈→↕ '$courseid','$time')";
>'δ÷ $row=$obj->execute>α($sql);
♠± if($row){
查詢原來β₩↓÷(lái)課程關注數(shù)并加一(yī)
&↔>nbsp; $sql1="selec focuse fromε< weixin_course_class wher cid='$cours γeid'";
&λ nbsp; $focuse=$obj->query($sql1←± );
ε >★ $focuse=$focuse[0][foc±×use];
&nbπ¥≈sp; $t©≈$βot=$focuse+1;
£♦÷ $sql2="Ωλ;updat weixin_course_class set f✘¥<πocuse='$tot' wher cid='$courseid'&₩•quot;;
&nbs∏↕♦p; $ftot=$obj->execu∏↕te($sql2);
>♦ echo 1;
}
}
public function qu(){
£∏<
&≠ ;$courseid=$_POST['courseid'];//從(cóng)§♣前台獲取的(de)課程id
$user↕♦∑×id=$_SESSION['userid'];//$_SE×ΩSSION中獲取用(yòng)戶id
$obj=M();""
₩α€♠取消增加關注
γ₹≠£ $sql="delet from &nbs©∑©Ωp;weixin_follow wher userid='$userid' a±✘✘₩nd courseid='$courseid'";
$row=$o>↓ §bj->execute($sql);
i$∞α$f($row){
&nbs↕α®αp;查詢原來(lái)課程關注數(shù)&δ并減一(yī)
&n'bsp; $sql1="selec fo≤$δ¶cuse from weixin_course_cl ∞ass wher cid='$courseid'∏♠∑";
&n★¥<δbsp; $focuse=$obj->q↕≤∏αuery($sql1);
&n☆'bsp; $focuse=$focuse[0][focuse£<₩∑];
&nbs׶✔£p; $tot=$focuse× -1;
β $sql2=&quoγ↑ ∏t;updat weixin_course_class set £≥focuse='$tot' wher ci ≤d='$courseid'";
&nb'•sp; $ftot=$★$obj->execute($sql'♠2);
&nbs∞→p; echo 1;
}
}
