Online PHP editor | output for m6iA4

<?php // Redefine the exception so message isn't optional public function __construct($message, $code = 0, Exception $previous = null) { // some code // make sure everything is assigned properly parent::__construct($message, $code, $previous); } // custom string representation of object public function __toString() { return __CLASS__ . ": [{$this->code}]: {$this->message}\n"; } public function customFunction() { echo "A custom function for this type of exception\n"; } } class TestException { public $var; const THROW_NONE = 0; const THROW_CUSTOM = 1; const THROW_DEFAULT = 2; function __construct($avalue = self::THROW_NONE) { switch ($avalue) { case self::THROW_CUSTOM: // throw custom exception throw new MyException('1 is an invalid parameter', 5); break; case self::THROW_DEFAULT: // throw default one. throw new Exception('2 is not allowed as a parameter', 6); break; default: // No exception, object will be created. $this->var = $avalue; break; } } } // Example 1 try { $o = new TestException(TestException::THROW_CUSTOM); } catch (MyException $e) { // Will be caught echo "Caught my exception\n", $e; $e->customFunction(); } catch (Exception $e) { // Skipped echo "Caught Default Exception\n", $e; } // Continue execution var_dump($o); // Null echo "\n\n"; // Example 2 try { $o = new TestException(TestException::THROW_DEFAULT); } catch (MyException $e) { // Doesn't match this type echo "Caught my exception\n", $e; $e->customFunction(); } catch (Exception $e) { // Will be caught echo "Caught Default Exception\n", $e; } // Continue execution var_dump($o); // Null echo "\n\n"; // Example 3 try { $o = new TestException(TestException::THROW_CUSTOM); } catch (Exception $e) { // Will be caught echo "Default Exception caught\n", $e; } // Continue execution var_dump($o); // Null echo "\n\n"; // Example 4 try { $o = new TestException(); } catch (Exception $e) { // Skipped, no exception echo "Default Exception caught\n", $e; } // Continue execution var_dump($o); // TestException echo "\n\n"; ?>