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<?php declare(strict_types = 1); phpversion() >= "7.0.0" or die(); class FooBar { public $prop = '123'; } class BarFoo { public $prop = '312'; } function test () : FooBar { return new FooBar; } function test1 () : BarFoo { return new FooBar; } var_dump(test()); var_dump(test1());
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.17 - 7.2.25, 7.3.0 - 7.3.12, 7.4.0
object(FooBar)#1 (1) { ["prop"]=> string(3) "123" } Fatal error: Uncaught TypeError: Return value of test1() must be an instance of BarFoo, instance of FooBar returned in /in/U8KNE:19 Stack trace: #0 /in/U8KNE(24): test1() #1 {main} thrown in /in/U8KNE on line 19
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Warning: Unsupported declare 'strict_types' in /in/U8KNE on line 2 Parse error: syntax error, unexpected ':', expecting '{' in /in/U8KNE on line 14
Process exited with code 255.
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