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<?php $obj = new stdClass(); $obj->bar = "xyz"; $data = array("foo" => "bar"); $key = "foo"; // the good: without and within a string echo $obj->{$data[$key]}; echo "{$obj->{$data[$key]}}"; // the bad: try { echo $obj->${data[$key]}; // syntax error } catch (ParseError $e){ echo $e->getMessage(),"\n"; } // complex curly brace syntax: without and within a string echo $obj->{${'data'}[$key]}; echo "{$obj->{${'data'}[$key]}}";
Output for git.master, git.master_jit, rfc.property-hooks
xyzxyz Fatal error: Uncaught Error: Undefined constant "data" in /in/VCP9t:14 Stack trace: #0 {main} thrown in /in/VCP9t on line 14
Process exited with code 255.

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