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<?php function numbers() { $numbers = [1, 2, 3]; $letters = letters(); foreach($numbers as $number) { yield $number; yield $letters->current(); $letters->next(); } } function letters() { $letters = ['A', 'B', 'C']; foreach ($letters as $letter) { yield $letter; yield numbers(); } } foreach (numbers() as $x) { echo $x . PHP_EOL; }
Output for git.master, git.master_jit, rfc.property-hooks
1 A 2 Fatal error: Uncaught Error: Object of class Generator could not be converted to string in /in/eOg91:27 Stack trace: #0 {main} thrown in /in/eOg91 on line 27
Process exited with code 255.

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