How can PHP beginners ensure proper understanding and usage of include and require_once statements in their code?

To ensure proper understanding and usage of include and require_once statements in PHP code, beginners should familiarize themselves with the differences between the two statements. Include allows the script to continue running even if the included file is not found, while require_once will halt script execution if the file is not found. It is recommended to use require_once for essential files that are necessary for the script to function correctly. 

<?php
// Using require_once to include a file that is essential for the script
require_once 'essential_file.php';

// Code that depends on the contents of essential_file.php
?>

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PHP include require_once understanding usage

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