Exception handling is a more structured approach to dealing with errors in PHP and many other programming languages. Exceptions are used to represent and handle error conditions in a more organized and predictable way. You can throw exceptions when exceptional circumstances arise and catch them in appropriate places in your code.
PHP Exceptions
// Custom exception class
class MyException extends Exception {}
// Example of exception handling
function divide($numerator, $denominator) {
if ($denominator === 0) {
throw new MyException("Division by zero is not allowed.");
}
return $numerator / $denominator;
}
try {
$result = divide(10, 0);
} catch (MyException $e) {
echo "Custom exception caught: " . $e->getMessage();
} catch (Exception $e) {
echo "Generic exception caught: " . $e->getMessage();
}
In this example, we define a custom exception class MyException. Inside the divide function, we check for a division by zero condition and throw a custom exception if encountered. We then catch this specific exception using a try-catch block. If a more general exception is thrown, we can catch it with the second catch block, which handles exceptions of type Exception.
Exception handling allows you to create custom error messages, manage error contexts, and handle different types of errors separately, providing better control over error management in your PHP applications.
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