wordpress 4.7 版本新增了一个PDF缩略图生成和预览的功能，当您上传完PDF格式的文件以后，会自动生成这个PDF文件的缩略图，并显示预览，如下图所示：

但是如果您已经在使用其他的PDF插件实现了类似的功能，并且不希望与这个新增的功能有冲突，您可能希望禁用掉 wordpress 4.7 版本新增的PDF缩略图预览功能。

实现的方法很简单，切换到主题目录，打开 functions.PHP 文件，添加以下代码即可：

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Crayon-button Crayon-plain-button" title="Toggle Plain Code">

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Crayon-button Crayon-wrap-button" title="Toggle Line Wrap">

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Crayon-button Crayon-expand-button" title="Expand Code">

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Crayon-num Crayon-striped-num" data-line="Crayon-5c891cb72dc63513843793-2">2

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修改以后当您再次上传完PDF文件之后，插入界面如下图所示：

感兴趣的朋友可以尝试着用上面的方法禁用 wordpress 4.7 版本新增的PDF缩略图预览功能。

参考出自：wordpress/" href="http://www.wpbeginner.com/wp-tutorials/how-to-disable-pdf-thumbnail-previews-in-wordpress/" target="_blank" rel="nofollow">http://www.wpbeginner.com/wp-tutorials/how-to-disable-pdf-thumbnail-previews-in-wordpress/

原文链接：https://www.f2er.com/wordpress/238360.html

PDF缩略图预览