How can I use "Dependency Injection" in simple php functions, and should I bother?

How can I use "Dependency Injection" in simple php functions, and should I bother?

php dependency-injection parameter-passing

php

How to keep already-set GET parameter values on form submission?

php get parameter-passing forms

php

PHP, pass parameters from command line to a PHP script

php parameter-passing command-line-interface

php

How to work with infinity arguments in a function (like PHP's isset()) [duplicate]

php function parameters parameter-passing param

php

PHP: variable-length argument list by reference?

php pass-by-reference parameter-passing variadic-functions function-parameter

php

How to pass parameters from bash to php script?

php bash shell parameters parameter-passing

php

Pass array literal to PostgreSQL function

php sql arrays postgresql parameter-passing

php

How to pass variables between php scripts?

php parameter-passing arguments

php

Can you pass more parameters than a function expects?

php parameter-passing

php

Are php resources passed by reference?

php parameter-passing

php

Is passing NULL param exactly the same as passing no param

php function parameters parameter-passing optional-parameters

php

Passing a Python list to php

php python parameter-passing

php