3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php phpversion() >= "7.0.1" or die(); $obj = new stdClass(); $obj->bar = "abc"; $data = array("foo" => "bar"); $key = "foo"; // the bad: try { echo @$obj->${data[$key]}; // syntax error } catch (Error $e){ echo $e->getMessage(),"\n"; } // uvs - the good: without and within a string echo $obj->{$data[$key]},"\n"; echo "{$obj->{$data[$key]}}\n"; $obj->bar = "xyz"; // uvs - complex curly brace syntax: without and within a string echo $obj->{${'data'}[$key]},"\n"; echo "{$obj->{${'data'}[$key]}}\n";
based on iNekE
Output for 7.1.0 - 7.2.0
abc abc xyz xyz
Output for 7.0.1 - 7.0.20
Cannot access empty property abc abc xyz xyz
Output for 5.6.0 - 7.0.0
Output for 5.5.0 - 5.5.38
Parse error: syntax error, unexpected '[' in /in/P0viL on line 11
Process exited with code 255.