No suggestions for PDO object

I'm referencing a PDO object but not finding any of the functions available on it.

I've included "ext-pdo" in my composer.json but it seems trying to "use" it isn't helping. 

What am I missing?

I saw this very helpful post, but it's not helping me got to the root of my issue:


Hi there,

Accordingly to your screenshot $pdo is a function parameter. You need to typehint it in order for the IDE to provide code completion. This can be done via PHP's own typehint or by using PHPDoc.

For example:

function sanitize (PDO $pdo, $str) {



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