SC1016

This is a unicode single quote. Delete and retype it.

Problematic code:

echo ‘hello world’

Correct code:

echo 'hello world'

Rationale:

Some software, like OS X, Word and Wordpress, may automatically replace your regular quotes with slanted unicode quotes. Try deleting and retyping them, and/or disable "smart quotes" in your editor or OS.

Contraindications

None