I saw that there are a lot of topics on simplehtmldom, but no one's problem seems to be mine- specifically, that it just 500s, even on the examples provided. I've found that I can include the file without an error, but if I then try to use file_get_html, it 500s. The only thing I found in the manual about installation is a possible problem with allow_fopen_url, which I do.
Something I'm missing?
Seems like too long since you asked this question, but since I came across this trying to solve this problem myself, I thought I'd post what worked for me.
I solved this problem by changing file_get_html to file_get_contents. Since I wanted to use the 'find' feature in simple_html_dom, I had to then convert the string to an object:
$string = file_get_contents(http://thedeadfallproject.com/)
$object = new simple_html_dom();
$object->load($string); // Load HTML from a string
来源：https://stackoverflow.com/questions/7380774/simplehtmldom-500-error