[discuz建站技术]
discuz支持gif作为缩略图
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我用的是discuz 3.4 gbk,其他版本应该也差不多。
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% Q8 X g2 C8 x; S/ ]/ A/ V- u p- hdiscuz默认情况下,gif是不能作为缩略图的,有位站长希望让gif也能作为缩略图,就是某个板块开启图片列表功能后,发新帖,gif的会自动设置为封面,看了看代码,插件估计无法实现,只能改源码,一共需要改两个文件:
# s' L- f" E3 p1 m. O! o5 A1,function_foum.php
8 X7 |& J0 a% R列表里的缩略图是通过这个文件里的getthreadcover来返回的,默认情况下,缩略图是jpg后缀的,并且根据tid设置路径规则,缩略图存放在'data\attachment\forum\threadcover'.substr(md5($tid), 0, 2).'/'.substr(md5($tid), 2, 2).'/'.$tid.'.jpg';,其实gif的也是这个,只是后缀是gif,因此我们必须动态获取封面的后缀了。封面图片放在forum_threadiamge表里,我们可以根据图片后缀来判断图片类型。修改后的函数如下:
n+ f( j$ n l. ?2 ^function getthreadcover($tid, $cover = 0, $getfilename = 0) {
, p# f* n3 r0 p( ? global $_G;
* B: M# M, ~5 v; ~" m/ H if(empty($tid)) {; o; E. p0 U% Z2 I7 I8 }) B* ?: c$ s
return '';& m% I2 b' f% a7 a7 Q. p* [
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$coverpath = '';6 m7 r; L0 \9 n2 K
$filename = DB::result_first('select attachment from %t where tid = %d', array('forum_threadimage', $tid));+ b/ H/ }7 j6 s: D+ W# i
$ext = fileext($filename);- ~4 @' S- |4 T; m& A
$covername = 'threadcover/'.substr(md5($tid), 0, 2).'/'.substr(md5($tid), 2, 2).'/'.$tid.'.'.$ext;: X+ @, M0 l& ~. C, M
//$covername = 'threadcover/'.substr(md5($tid), 0, 2).'/'.substr(md5($tid), 2, 2).'/'.$tid.'.jpg'; // 原来的。# f9 q! j3 k% G3 E7 u6 b
% b* \2 y) I2 X4 A8 _ if($getfilename) {
4 p5 Z% d I' m# D% l return $covername;) @/ m: K5 {% t
}
6 B' J* `9 M, T; \' }7 t; d9 a if($cover) {
6 N( s/ s$ O- @$ v2 M $coverpath = ($cover < 0 ? $_G['setting']['ftp']['attachurl'] : $_G['setting']['attachurl']).'forum/'.$covername;7 x8 R; {0 f1 S5 b
}
) R/ Z, y, ]5 P' S return $coverpath;" f' z/ @: ]# l p
}
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- n. C/ G* \7 `- B' O- m/ ~) C2,function_post.php8 K/ i. }+ f R. ^: x
这个文件里的setthreadcover函数是用来设置帖子封面的,无论是新发帖,手动设置封面以及后来重建封面,都会调用这个函数,魔趣吧。我们要改的是判断图片是否是gif,如果是gif就不走系统设置封面的流程,而是直接把这个gif图片复制到封面路径里,直接附上代码吧。
; [1 B! S- G- K1 o5 _function setthreadcover($pid, $tid = 0, $aid = 0, $countimg = 0, $imgurl = '') {# b, n" b6 V. k' M7 w/ h
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global $_G;
/ a7 S# T% W4 c $cover = 0;
$ o3 G$ E$ q) P) T7 ?+ F4 \9 Z8 n' ? if(empty($_G['uid']) || !intval($_G['setting']['forumpicstyle']['thumbheight']) || !intval($_G['setting']['forumpicstyle']['thumbwidth'])) {
" g; b( v) F; s! V3 A return false;
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if(($pid || $aid) && empty($countimg)) {" c: c: f a8 c; a
if(empty($imgurl)) {
8 T, S& q# o& x D- l5 D1 w if($aid) {
S8 G+ E" ~) f $attachtable = 'aid:'.$aid;5 ^! p# X$ a) G% U9 y# O l/ l
$attach = C::t('forum_attachment_n')->fetch('aid:'.$aid, $aid, array(1, -1));
& H$ U% t/ Z" L* e } else {
) J7 C0 L @% | v3 G' D $attachtable = 'pid:'.$pid;/ m6 F+ O0 j2 }7 S o0 M
$attach = C::t('forum_attachment_n')->fetch_max_image('pid:'.$pid, 'pid', $pid);8 @# H1 \% H- T1 P
}
/ t/ p1 r0 ~( y1 q1 {! b if(!$attach) {6 x: h! c0 j6 \4 i* L4 w
return false;
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if(empty($_G['forum']['ismoderator']) && $_G['uid'] != $attach['uid']) {; [4 J* |: o( a8 v: |- b% f
return false;
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$pid = empty($pid) ? $attach['pid'] : $pid;
8 f/ E0 H ]& G. q# x $tid = empty($tid) ? $attach['tid'] : $tid;3 u" E% f0 H7 j' d
$picsource = ($attach['remote'] ? $_G['setting']['ftp']['attachurl'] : $_G['setting']['attachurl']).'forum/'.$attach['attachment'];/ d& u8 {5 T1 z
} else {8 m! d5 \) D5 U+ X6 Q; ]/ ?4 W
$attachtable = 'pid:'.$pid;
% m9 C# ?( Q3 G b $picsource = $imgurl;9 ]- L2 h7 r5 D" T
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$basedir = !$_G['setting']['attachdir'] ? (DISCUZ_ROOT.'./data/attachment/') : $_G['setting']['attachdir'];. f4 X5 S7 u) S5 H9 E: |
$coverdir = 'threadcover/'.substr(md5($tid), 0, 2).'/'.substr(md5($tid), 2, 2).'/';
( [ f% \0 c! g/ E- G0 R dmkdir($basedir.'./forum/'.$coverdir);
3 ~: ~; `: |3 X, g+ N$ {
, n0 M X+ F% t if(fileext($picsource) == 'gif') { // 判断是否是gif$ F+ R2 `2 D& ]% n+ ~2 ]
copy($picsource, 'data/attachment/forum/'.$coverdir.$tid.'.gif'); // 直接把gif图片复制到缩略图目录,并改名为tid.gif
# z( b; m* A: X; m $cover = C::t('forum_attachment_n')->count_image_by_id($attachtable, 'pid', $pid);5 g/ @) _. G' V5 _& T
if($imgurl && empty($cover)) {7 `' F* d# g7 ]( m* o
$cover = 1;
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} else {
5 @9 Y7 E2 l% r require_once libfile('class/image');
+ c0 A! I0 k+ X" } $image = new image();$ J' Z" G1 k( x7 |0 n& j
if($image->Thumb($picsource, 'forum/'.$coverdir.$tid.'.jpg', $_G['setting']['forumpicstyle']['thumbwidth'], $_G['setting']['forumpicstyle']['thumbheight'], 2)) {8 b3 A9 L& r8 l+ ?) l, D0 X
$remote = '';
" j, D! }" @" F& _ M4 P if(getglobal('setting/ftp/on')) {
" E' i2 E; b2 D if(ftpcmd('upload', 'forum/'.$coverdir.$tid.'.jpg')) {
M" D- {! p; e" ]/ H, z $remote = '-';
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$cover = C::t('forum_attachment_n')->count_image_by_id($attachtable, 'pid', $pid);
* ]3 Q1 [6 `/ W6 Q" [' T0 u if($imgurl && empty($cover)) {# N" L" x$ \% [9 u' a+ R
$cover = 1;# }& i$ Q2 W. B) P! z- \
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$cover = $remote.$cover;( Q; ~% R3 P% m3 h: j
} else {7 |% {4 N" V a
return false;
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}
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}
& s" ~9 s& \1 m4 X7 C& [ if($countimg) {& [4 z6 r/ A7 C/ k
if(empty($cover)) {
) }5 O3 y: f0 H( H' t: J6 d7 H $thread = C::t('forum_thread')->fetch($tid);
& D" V5 B. e# v- I; ] $oldcover = $thread['cover'];3 f) \/ g: H7 B% p2 z9 f0 g
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$cover = C::t('forum_attachment_n')->count_image_by_id('tid:'.$tid, 'pid', $pid);
4 \9 N+ q, ]2 t; | if($cover) {
( m2 o, p7 y& c& o8 z $cover = $oldcover < 0 ? '-'.$cover : $cover;7 M% \1 n7 \; E& u
}7 A _( l: R) X" Z) m# I; ^- }
}
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if($cover) {
' |8 e; M2 _5 n* z" r) M+ d C::t('forum_thread')->update($tid, array('cover' => $cover));) H) v5 t; c9 B; U* l/ E& a
return true;) D5 T! R. S" h$ r* J- z
}
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4 y O, F& l0 @; v# B2 C完事了。$ t, I2 C% M9 Y+ C8 K% F( q
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