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<?php interface Printable { public function __toString(); } class MyPrintableClass implements Printable { public $myNumericProperty; public function __construct() { $this->myNumericProperty = 10; } public function __toString() { return 'My numeric property is ' . $this->myNumericProperty; } } function printSomething(Printable $aString) { echo $aString; } printSomething(new MyPrintableClass()); printSomething("You can't print a real sting");
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
My numeric property is 10 Fatal error: Uncaught TypeError: printSomething(): Argument #1 ($aString) must be of type Printable, string given, called in /in/K0KjM on line 24 and defined in /in/K0KjM:19 Stack trace: #0 /in/K0KjM(24): printSomething('You can't print...') #1 {main} thrown in /in/K0KjM on line 19
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
My numeric property is 10 Fatal error: Uncaught TypeError: Argument 1 passed to printSomething() must implement interface Printable, string given, called in /in/K0KjM on line 24 and defined in /in/K0KjM:19 Stack trace: #0 /in/K0KjM(24): printSomething('You can't print...') #1 {main} thrown in /in/K0KjM on line 19
Process exited with code 255.
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
My numeric property is 10 Catchable fatal error: Argument 1 passed to printSomething() must implement interface Printable, string given, called in /in/K0KjM on line 24 and defined in /in/K0KjM on line 19
Process exited with code 255.
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