I am very new to PHP and i use Sublime Text 2 as a frontend developer. I almost use PHP inside HTML and i have heard that it is better to use single quotes ('') because it is faster. But when i e.g. write "ech" than sublime gives me the auto-complete option with double quotes, why is that? And how can ich change it to give me single quotes?
It really does not matter if you use single or double quotes.
You will find there will be no visible speed difference at all, this is just a thing of personal preference.
You will find your self using both single/double quotes anyway at some points.