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run code in 150+ php & hhvm versions
Bugs & Features
<?php function printer() { yield 3; echo $string; } $printer = printer(); foreach($printer as $v) { var_dump($v); } return; $printer->next(); $printer->send('Hello world!'); foreach($printer as $v) { var_dump($v); } ?>
based on CT3sN
Output for 5.5.24 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
int(3) Notice: Undefined variable: string in /in/dFBPT on line 4
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '3' (T_LNUMBER) in /in/dFBPT on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_LNUMBER in /in/dFBPT on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_LNUMBER in /in/dFBPT on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/dFBPT on line 3
Process exited with code 255.