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<?php function gen() { yield 10 => "gen"; yield "another"; } function yf() { yield from gen(); yield from gen(); } foreach(yf() as $key => $val) { echo "$key => $val\n"; }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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
10 => gen 11 => another 10 => gen 11 => another
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected 'gen' (T_STRING) in /in/ZE8D6 on line 9
Process exited with code 255.

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