The headline says "Database management in single PHP file".

Is this correct english? Im not a native english speaker. To me it sounds like it should read "in a single PHP file".

Same with "Replace phpMyAdmin by Adminer and you will get tidier user interface"

Yes, it is a bit strange. I'm a native speaker and I would have said "in a single PHP file" too.

A lot of non-native English speakers have difficulty with articles (a, an, the, etc.).

I'd say the word 'single' is redundant as it a PHP file. How about "Database management in a PHP file"?

But then it doesn't have as much impact emphasising the simplicity of it.

It is odd. "a file" almost feels less specific than "a single file", even though the latter is technically redundant.

I've added "a" between "in" and "single", it started sounding weird to me some time ago as well. Thanks for the suggestion. Can you please propose a correct wording for the second sentence?

It's from Jakub Vrána, a Czech developer. Czenglish sucks.

Adminer is a huge upgrade from phpMyAdmin.

The "single file" feature makes installation and updating easy, but the features and usability improvements over phpMyAdmin seal the deal.

It basically fixes every annoyance of phpMyAdmin. Zero config, saved logins, no iframes, consistent and predictable UI. Love this program.

adminer rocks. Drop 1 file and you can manage your DB. Especially useful when you quickly want to look at a client's site's DB before getting your hands dirty.