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<?php class Example { private int $_nextNumber; public int $nextNumber { get { $this->_nextNumber ??= 0; return $this->_nextNumber++; } } } $foo = new Example; var_dump($foo->nextNumber, $foo->nextNumber, $foo->nextNumber); $foo->nextNumber = 42;
Output for rfc.property-hooks
int(0) int(1) int(2) Fatal error: Uncaught Error: Property Example::$nextNumber is read-only in /in/cAfAI:16 Stack trace: #0 {main} thrown in /in/cAfAI on line 16
Process exited with code 255.

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