为什么浏览器不解析内容?

I have a website running on a linux apache server.

A dynamic .php page sometimes doesn't show up (page is white/blanc) while the content is present in the source code, it seems that the browser did not parse the content.

I don't know why the browser didn't parse, I have the impression that it thinks the page is still loading and therefore not parsing (as the browser indicates it is still loading). However as all the content is already there it should start showing up.

There are only notices in the errorlog.

  • What could be the cause for the browser not parsing the content/ thinking the page is still loading?
  • What could I do about it?