PHP，变量和函数在单独的文件中[重复]

Question

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• Reference: What is variable scope, which variables are accessible from where and what are “undefined variable” errors? 3 answers

I have 2 files:

file1 - variables.php

$variable = something;

and file2 - functions.php

function somefunction() {    
    do_something_with $variable;
}

How can I use variable, defined in one file, in function defined in second file?

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Answer 1

use include_once / require_once "file2" inside file1 and call the "somefunction" with $variable as argument.