Errors in WordPress files can make WordPress only display a plain white screen. Since the screen is all white, it’s difficult to figure out what is going on.
What Causes A White Screen?
Some causes could be:
- Errors in a WordPress update, leaving files incomplete. (Syntax errors)
- Errors in a Theme update (or bugs in the theme)
- Errors in a Plugin (or bugs in the plugin)
- Exceeding the PHP memory limit of a web hosting provider (can be changed in most cases, try editing your php.ini to include:
memory_limit = 33554432(32MB, or a higher number)
How to Find the Problem
A temporary thing to try (don’t leave this set!) is to edit your .htaccess adding this line: php_flag display_errors on, which could let you see if files are missing or what file and line number has the syntax error. Any PHP programmer could then help you fix it, since it is highly likely something simple.
But the most common solution you’re going to find online is to remove a blank line and that “blank line” was the problem, since removing it fixed it! (Not accurate) A Variant is “a space” did it (also not accurate).