3v4l.org

run code in 300+ PHP versions simultaneously
<?php phpversion() >= "7.0.1" or die(); $obj = new stdClass(); $obj->bar = "abc"; $data = array("foo" => "bar"); $key = "foo"; // the good: without and within a string echo $obj->{$data[$key]},"\n"; echo "{$obj->{$data[$key]}}\n"; // updating $obj->bar ... $obj->bar = "xyz"; // complex curly brace syntax: without and within a string echo $obj->{${'data'}[$key]},"\n"; echo "{$obj->{${'data'}[$key]}}\n"; echo "{$obj->{${data}[$key]}}\n";
Output for 7.2.0 - 7.2.24, 7.3.0 - 7.3.12
abc abc xyz xyz Warning: Use of undefined constant data - assumed 'data' (this will throw an Error in a future version of PHP) in /in/UAPpf on line 20 xyz
Output for 7.0.1 - 7.0.20, 7.1.0 - 7.1.33
abc abc xyz xyz Notice: Use of undefined constant data - assumed 'data' in /in/UAPpf on line 20 xyz
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0
preferences:
98.77 ms | 402 KiB | 92 Q