How can error reporting settings in PHP impact the identification of undeclared variables and potential issues in code?

Error reporting settings in PHP can impact the identification of undeclared variables and potential issues in code by displaying warnings or errors when a variable is used without being declared. To ensure that all potential issues are caught, it is recommended to set error_reporting to E_ALL in the php.ini file or at the beginning of the script. This will help developers identify and fix any undeclared variable issues before they cause runtime errors.

// Set error reporting to display all errors
error_reporting(E_ALL);