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<?php function numbers() { $numbers = [1, 2, 3]; foreach($numbers as $number) { echo $number . PHP_EOL; yield letters(); } } function letters() { $letters = ['A', 'B', 'C']; foreach ($letters as $letter) { echo $letter . PHP_EOL; yield numbers(); } } numeros();
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Call to undefined function numeros() in /in/fvMWj:24 Stack trace: #0 {main} thrown in /in/fvMWj on line 24
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Call to undefined function numeros() in /in/fvMWj on line 24
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'letters' (T_STRING) in /in/fvMWj on line 9
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/fvMWj on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/fvMWj on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/fvMWj on line 5
Process exited with code 255.

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