3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { async function f() { $a = async function ($x) { var_dump($x); }; $a(1); } }
Output for 7.1.0 - 7.1.6
Parse error: syntax error, unexpected 'async' (T_STRING), expecting function (T_FUNCTION) or const (T_CONST) in /in/GZuQ5 on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.20
Parse error: syntax error, unexpected 'async' (T_STRING), expecting function (T_FUNCTION) in /in/GZuQ5 on line 4
Process exited with code 255.
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