How does PHP handle communication between files and what is the best practice for passing variables between them?

PHP handles communication between files by using include, require, or require_once functions to include the contents of one file into another. The best practice for passing variables between files is to use functions or classes to encapsulate the logic and data, making it easier to manage and maintain. 

// File1.php
$var = "Hello";
include 'File2.php';

// File2.php
echo $var; // Outputs: Hello

Keywords

PHP file communication variable passing include require

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