Arguments or parameters? [duplicate]

Answer 1

A variable is a storage location and an associated symbolic name (an identifier) which contains data, a value.

A parameter is a variable passed to a function.

An argument is data (a value) passed to a function.

$variable = 'data/value';

function first($variable){ ... }

function second('data/value'){ ... }
function third(16){ ... }

In function first we are passing a parameter.

In function second and third we are passing arguments.