How can custom exceptions help in categorizing and responding to errors in PHP code?

Custom exceptions in PHP can help in categorizing and responding to errors by allowing developers to create their own exception classes that extend the base Exception class. This enables them to define specific error types and messages, making it easier to handle different types of errors in a more organized manner. By throwing custom exceptions, developers can also provide more detailed information about what went wrong, making it easier to debug and fix issues in the code. 

class CustomException extends Exception {}

function divide($numerator, $denominator) {
    if ($denominator == 0) {
        throw new CustomException("Division by zero is not allowed");
    }
    return $numerator / $denominator;
}

try {
    echo divide(10, 0);
} catch (CustomException $e) {
    echo "Error: " . $e->getMessage();
}

Keywords

Custom exceptions error handling PHP code exception hierarchy error categorization

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