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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: echo $obj->${data[$key]}; // syntax error // complex curly brace syntax: without and within a string echo $obj->{${'data'}[$key]}; echo "{$obj->{${'data'}[$key]}}";
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
xyzxyz Fatal error: Uncaught Error: Undefined constant "data" in /in/upm4G:13 Stack trace: #0 {main} thrown in /in/upm4G on line 13
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 xyzxyz Fatal error: Uncaught Error: Undefined constant "data" in /in/upm4G:13 Stack trace: #0 {main} thrown in /in/upm4G on line 13
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
xyzxyz Warning: Use of undefined constant data - assumed 'data' (this will throw an Error in a future version of PHP) in /in/upm4G on line 13 Warning: Illegal string offset 'foo' in /in/upm4G on line 13 Notice: Undefined variable: d in /in/upm4G on line 13 Notice: Undefined property: stdClass::$ in /in/upm4G on line 13 xyzxyz
Output for 7.3.32 - 7.3.33
xyzxyz Warning: Use of undefined constant data - assumed 'data' (this will throw an Error in a future version of PHP) in /in/upm4G on line 13 Warning: Illegal string offset 'foo' in /in/upm4G on line 13 xyzxyz
Output for 7.1.0 - 7.1.20
xyzxyz Notice: Use of undefined constant data - assumed 'data' in /in/upm4G on line 13 Warning: Illegal string offset 'foo' in /in/upm4G on line 13 Notice: Undefined variable: d in /in/upm4G on line 13 Notice: Undefined property: stdClass::$ in /in/upm4G on line 13 xyzxyz
Output for 7.0.0 - 7.0.20
xyzxyz Notice: Use of undefined constant data - assumed 'data' in /in/upm4G on line 13 Warning: Illegal string offset 'foo' in /in/upm4G on line 13 Notice: Undefined variable: d in /in/upm4G on line 13 Fatal error: Uncaught Error: Cannot access empty property in /in/upm4G:13 Stack trace: #0 {main} thrown in /in/upm4G on line 13
Process exited with code 255.
Output for 5.6.8 - 5.6.28
xyzxyz Notice: Use of undefined constant data - assumed 'data' in /in/upm4G on line 13 Warning: Illegal string offset 'foo' in /in/upm4G on line 13 Notice: Undefined variable: d in /in/upm4G on line 13 Fatal error: Cannot access empty property in /in/upm4G on line 13
Process exited with code 255.
Output for 5.5.24 - 5.5.35
Parse error: syntax error, unexpected '[' in /in/upm4G on line 13
Process exited with code 255.
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