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  1. <?php
  2.  
  3. class A { }
  4. class B extends A { }
  5.  
  6. interface I {
  7. 	public function f(B $x);
  8. }
  9.  
  10. class C implements I {
  11. 	public function f(A $x) { }
  12. }
  13.  
Runtime error #stdin #stdout #stderr 0.01s 20568KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
stderr 
PHP Fatal error:  Declaration of C::f() must be compatible with I::f(B $x) in /home/qX7CcX/prog.php on line 10
https://ideone.com/iNl1hF
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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