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<?php class Counter implements Countable { public function count() { var_dump(func_get_arg(0)); return count($this->data); } } $counter = new Counter; $counter->count();
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of Counter::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/AGHLJ on line 4 Fatal error: Uncaught ValueError: func_get_arg(): Argument #1 ($position) must be less than the number of the arguments passed to the currently executed function in /in/AGHLJ:6 Stack trace: #0 /in/AGHLJ(6): func_get_arg(0) #1 /in/AGHLJ(12): Counter->count() #2 {main} thrown in /in/AGHLJ on line 6
Process exited with code 255.

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