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<?php function & genRefInner() { $var = 1; yield $var; } function & genRefOuter() { return genRefInner(); } foreach(genRefOuter() as &$i) { var_dump($i); }
Output for 5.5.25 - 5.5.35, 5.6.9 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Notice: Only variable references should be returned by reference in /in/gr0IB on line 9 int(1)
Output for 5.5.24, 5.6.8, 7.3.32 - 7.3.33
int(1)
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$var' (T_VARIABLE) in /in/gr0IB on line 5
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 T_VARIABLE in /in/gr0IB 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 T_VARIABLE in /in/gr0IB on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/gr0IB on line 5
Process exited with code 255.

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