Should PDO be used in a function?

Question

I may be asking this question wrong but I'm having trouble finding any specific answers. In most examples of the MySQL PDO I see, it's being used with functions for example:

 function getContent() {.....}

So my question is.... is the PDO I see being structured this way for security purposes or is it for other reasons such as cosmetic and or to prevent repetition etc?

You mean, as opposed to copy-pasting the connection code every time you want to use it? Most people use a class for database operations - you can easily store the connection in a private static property, for instance. — Niet the Dark Absol
– Niet the Dark Absol, Commented Aug 6, 2016 at 23:03

Nick Bull · Accepted Answer · 2016-08-06 23:03:35Z

Code ran in a function is scoped to that function, so parameters are encapsulated (i.e., not global). Apart from that, there's no real benefits to security. It's the same as executing the code from anywhere else. Most people use methods to organise code for reusability and to avoid repetition more than anything.

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