What steps can be taken to troubleshoot and resolve issues related to variable availability in PHP scripts, especially when variables are not accessible across different files?

Issue: Variables may not be accessible across different files in PHP scripts due to scope limitations. To troubleshoot and resolve this issue, you can use PHP's include or require functions to bring in external files that contain the variables you need. 

// File 1: variables.php
$variable = "Hello, world!";

// File 2: index.php
include 'variables.php';
echo $variable; // Output: Hello, world!

Keywords

PHP variable scope include require global variables

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