3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = 3; echo ${'data'}; echo "${data}"; echo ${data};
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/I7N4L on line 5 33 Fatal error: Uncaught Error: Undefined constant "data" in /in/I7N4L:6 Stack trace: #0 {main} thrown in /in/I7N4L on line 6
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
33 Fatal error: Uncaught Error: Undefined constant "data" in /in/I7N4L:6 Stack trace: #0 {main} thrown in /in/I7N4L on line 6
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
33 Warning: Use of undefined constant data - assumed 'data' (this will throw an Error in a future version of PHP) in /in/I7N4L on line 6 3
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25
33 Notice: Use of undefined constant data - assumed 'data' in /in/I7N4L on line 6 3

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