修复当图片附件高度超过999px时,图片列表会因封面高度太长而影响页面排版的问题 · Pull Request !1127 · Discuz/DiscuzX

### **描述此 Pull Request 的变更**

文件1
位置  \source\function\function_forum.php

437行：
`empty($_G['setting']['forumpicstyle']['thumbheight']) && $_G['setting']['forumpicstyle']['thumbheight'] = 999;`
改成
`empty($_G['setting']['forumpicstyle']['thumbheight']) && $_G['setting']['forumpicstyle']['thumbheight'] = 0;`

439行：
`$_G['setting']['forumpicstyle'] = array('thumbwidth' => 203, 'thumbheight' => 999);`
改成
`$_G['setting']['forumpicstyle'] = array('thumbwidth' => 203, 'thumbheight' => 0);`

原版默认999px高度内的图片会自动根据图片尺寸调整并裁剪, 但是一旦图片高度超过999px, 封面高度不会根据原图尺寸调整, 而是直接取999px作为高度, 让封面变成一个高度999px的长条图,非常影响观感.
搞不懂dz为什么要把高度非要弄个999...

文件2
位置  \source\function\function_post.php

622行：
`if(empty($_G['uid']) || !intval($_G['setting']['forumpicstyle']['thumbheight']) || !intval($_G['setting']['forumpicstyle']['thumbwidth'])) {`

改成：
`if(empty($_G['uid']) || !intval($_G['setting']['forumpicstyle']['thumbwidth'])) {`

这里只需要判断封面宽度即可, 所以去掉了主题封面高度判断, 因为主题封面高度在未设置或为0时, class_image.php会根据原图尺寸自动调整图片比例.

文件3
位置  \source\admincp\admincp_counter.php

440和441行：

```
empty($_G['setting']['forumpicstyle']['thumbwidth']) && $_G['setting']['forumpicstyle']['thumbwidth'] = 214;
empty($_G['setting']['forumpicstyle']['thumbheight']) && $_G['setting']['forumpicstyle']['thumbheight'] = 160;
```

改成

```
empty($_G['setting']['forumpicstyle']['thumbwidth']) && $_G['setting']['forumpicstyle']['thumbwidth'] = 203;
empty($_G['setting']['forumpicstyle']['thumbheight']) && $_G['setting']['forumpicstyle']['thumbheight'] = 0;
```

443行：
`$_G['setting']['forumpicstyle'] = array('thumbwidth' => 214, 'thumbheight' => 160);`
改成
`$_G['setting']['forumpicstyle'] = array('thumbwidth' => 203, 'thumbheight' => 0);`

这里对应后台重建封面图片时用到.
[管理后台>工具>更新统计]

宽度thumbwidth改成203, 对应后台设置主题封面宽度的默认值.
高度thumbheight为0时, 默认开启瀑布流.
[管理后台>界面>界面设置>主题列表页>主题封面宽/高度]

### **描述变更理由**
这是版本遗留的问题, X3+应该都存在这个问题
![输入图片说明](https://images.gitee.com/uploads/images/2021/0709/143439_25b22676_1309777.jpeg "231309_ae3b3afe_1309777.jpeg")
![输入图片说明](https://images.gitee.com/uploads/images/2021/0709/143449_acbe1b10_1309777.jpeg "231324_ef8d04c1_1309777.jpeg")

希望这次PR用对了

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