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run code in 150+ php & hhvm versions
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<?php function &generator(array &$array) { foreach($array as $key => &$value) { yield $key => $value; } } $array = range(1, 10); foreach(generator($array) as &$value) { $value++; } var_dump($array);
Output for 5.5.0 - 5.6.28, 7.0.0 - 7.1.0
array(10) { [0]=> int(2) [1]=> int(3) [2]=> int(4) [3]=> int(5) [4]=> int(6) [5]=> int(7) [6]=> int(8) [7]=> int(9) [8]=> int(10) [9]=> &int(11) }
Output for hhvm-3.12.0
Fatal error: Uncaught Error: An iterator cannot be used with foreach by reference in /in/ZL84S:14 Stack trace: #0 {main}
Process exited with code 255.
Output for hhvm-3.10.0
Fatal error: An iterator cannot be used with foreach by reference in /in/ZL84S on line 14
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$key' (T_VARIABLE) in /in/ZL84S on line 7
Process exited with code 255.
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_VARIABLE in /in/ZL84S on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/ZL84S on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/ZL84S on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/ZL84S on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/ZL84S on line 4
Process exited with code 255.