How can the error_reporting and display_errors settings in PHP help identify and troubleshoot issues like undefined constants?

When encountering issues with undefined constants in PHP, setting the error_reporting to E_ALL and display_errors to On can help identify and troubleshoot the problem. This will display error messages in the browser or log file, pointing out the exact location where the undefined constant is being used. By enabling these settings, developers can quickly identify and resolve issues related to undefined constants. 

<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Code where undefined constant is being used
echo UNDEFINED_CONSTANT;
?>

Keywords

error_reporting display_errors PHP undefined constants troubleshooting

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