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<?php declare(strict_types=1); class Amount { var $amount; } class TaxedAmount extends Amount { var $rate; function __toString() { return $this->amount * $this->rate; } } $item = new TaxedAmount; $item->amount = 242.0; $item->rate = 1.13; echo "You owe me $" . $item->__toString(). " for this answer.";
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: TaxedAmount::__toString(): Return value must be of type string, float returned in /in/LtUv0:9 Stack trace: #0 /in/LtUv0(15): TaxedAmount->__toString() #1 {main} thrown in /in/LtUv0 on line 9
Process exited with code 255.

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