最近因为经常折腾代码，于是找了一圈代码高亮插件，总觉得插件用起来不爽，只是需求一个简单的代码高亮显示，不用劳师动众，能手动解决的，还是自己搞，最后锁定 Google Code Prettify，纯 JS+CSS，绿色简洁，使用起来也很简单。
效果演示
function remove_image_size($sizes) {
unset( $sizes['small'] );
unset( $sizes['medium'] );
unset( $sizes['large'] );
return $sizes;
}
<pre class="prettyprint linenums"> //prettyprint 打印 pretty 样式 linenums 显示行号
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