3v4l.org

run code in 300+ PHP versions simultaneously
<?php phpversion() >= "7.0.1" or die(); $obj = new stdClass(); $obj->bar = "xyz"; $data = array("foo" => "bar"); $key = "foo"; var_dump(@$obj->${data}); echo @$obj->${data[$key]}; // syntax error
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.13, 7.3.0 - 7.3.1
NULL
Output for 7.0.1 - 7.0.20
NULL Fatal error: Uncaught Error: Cannot access empty property in /in/ALeOO:9 Stack trace: #0 {main} thrown in /in/ALeOO on line 9
Process exited with code 255.
Output for 5.6.8 - 5.6.28, 7.0.0
Output for 5.5.24 - 5.5.35
Parse error: syntax error, unexpected '[' in /in/ALeOO on line 9
Process exited with code 255.
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