How can error reporting be utilized to identify and address undefined constants in PHP scripts?

To identify and address undefined constants in PHP scripts, error reporting can be utilized to display notices for undefined constants. By enabling error reporting, PHP will notify you when a constant is used without being defined, allowing you to address the issue by either defining the constant or correcting the code. 

// Enable error reporting to display notices for undefined constants
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Example usage of an undefined constant
echo UNDEFINED_CONSTANT;

Keywords

error reporting undefined constants PHP scripts debugging E_NOTICE

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