3v4l.org

run code in 300+ PHP versions simultaneously
<?php function printer() { $i=true; $times=1; while ($i) { $string = yield; yield $string; $times++; $i=false; } var_dump($i,$times); } $printer = printer(); $printer->send('Hello world!'); echo $printer->current(); ?>
Output for 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Hello world!
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '$string' (T_VARIABLE) in /in/AeWPH on line 7
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/AeWPH on line 7
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/AeWPH on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/AeWPH on line 7
Process exited with code 255.

preferences:
249.42 ms | 401 KiB | 355 Q