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<?php class MyException extends Exception { // 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"; ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Caught my exception MyException: [5]: 1 is an invalid parameter A custom function for this type of exception Warning: Undefined variable $o in /in/3YDr0 on line 66 NULL Caught Default Exception Exception: 2 is not allowed as a parameter in /in/3YDr0:43 Stack trace: #0 /in/3YDr0(72): TestException->__construct(2) #1 {main} Warning: Undefined variable $o in /in/3YDr0 on line 81 NULL Default Exception caught MyException: [5]: 1 is an invalid parameter Warning: Undefined variable $o in /in/3YDr0 on line 93 NULL object(TestException)#3 (1) { ["var"]=> int(0) }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Caught my exception MyException: [5]: 1 is an invalid parameter A custom function for this type of exception Notice: Undefined variable: o in /in/3YDr0 on line 66 NULL Caught Default Exception Exception: 2 is not allowed as a parameter in /in/3YDr0:43 Stack trace: #0 /in/3YDr0(72): TestException->__construct(2) #1 {main} Notice: Undefined variable: o in /in/3YDr0 on line 81 NULL Default Exception caught MyException: [5]: 1 is an invalid parameter Notice: Undefined variable: o in /in/3YDr0 on line 93 NULL object(TestException)#3 (1) { ["var"]=> int(0) }
Output for 7.3.32 - 7.3.33, 7.4.26
Caught my exception MyException: [5]: 1 is an invalid parameter A custom function for this type of exception NULL Caught Default Exception Exception: 2 is not allowed as a parameter in /in/3YDr0:43 Stack trace: #0 /in/3YDr0(72): TestException->__construct(2) #1 {main}NULL Default Exception caught MyException: [5]: 1 is an invalid parameter NULL object(TestException)#3 (1) { ["var"]=> int(0) }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.21
Caught my exception MyException: [5]: 1 is an invalid parameter A custom function for this type of exception Notice: Undefined variable: o in /in/3YDr0 on line 66 NULL Caught Default Exception exception 'Exception' with message '2 is not allowed as a parameter' in /in/3YDr0:43 Stack trace: #0 /in/3YDr0(72): TestException->__construct(2) #1 {main} Notice: Undefined variable: o in /in/3YDr0 on line 81 NULL Default Exception caught MyException: [5]: 1 is an invalid parameter Notice: Undefined variable: o in /in/3YDr0 on line 93 NULL object(TestException)#3 (1) { ["var"]=> int(0) }
Output for 5.1.2 - 5.1.6, 5.2.0 - 5.2.17
Fatal error: Wrong parameters for Exception([string $exception [, long $code ]]) in /in/3YDr0 on line 11
Process exited with code 255.
Output for 5.1.0 - 5.1.1
Fatal error: Wrong parameter count for exception([string $exception [, long $code ]]) in /in/3YDr0 on line 11
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Fatal error: Argument 3 must not be null in /in/3YDr0 on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/3YDr0 on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/3YDr0 on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/3YDr0 on line 7
Process exited with code 255.
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