3v4l.org

run code in 300+ PHP versions simultaneously
<?php <?php function printer() { while (true) { $string = yield; echo $string; } } $printer = printer(); $printer->send('Hello world!'); ?>
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.17
Parse error: syntax error, unexpected '<' in /in/A6aPu on line 2
Process exited with code 255.

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195.53 ms | 1387 KiB | 53 Q