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 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";
Output for 7.2.0 - 7.2.13, 7.3.0
Warning: Use of undefined constant data - assumed 'data' (this will throw an Error in a future version of PHP) in /in/pqpGo on line 11 Warning: Illegal string offset 'foo' in /in/pqpGo on line 11 Notice: Undefined variable: d in /in/pqpGo on line 11 Notice: Undefined property: stdClass::$ in /in/pqpGo on line 11 abc abc xyz xyz
Output for 7.1.0 - 7.1.25
Notice: Use of undefined constant data - assumed 'data' in /in/pqpGo on line 11 Warning: Illegal string offset 'foo' in /in/pqpGo on line 11 Notice: Undefined variable: d in /in/pqpGo on line 11 Notice: Undefined property: stdClass::$ in /in/pqpGo on line 11 abc abc xyz xyz
Output for 7.0.1 - 7.0.33
Notice: Use of undefined constant data - assumed 'data' in /in/pqpGo on line 11 Warning: Illegal string offset 'foo' in /in/pqpGo on line 11 Notice: Undefined variable: d in /in/pqpGo on line 11 Cannot access empty property abc abc xyz xyz
Output for 5.6.0 - 5.6.38, 7.0.0
Output for 5.5.0 - 5.5.38
Parse error: syntax error, unexpected '[' in /in/pqpGo on line 11
Process exited with code 255.
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