- Output for 8.1.0 - 8.1.29, 8.2.0 - 8.2.20, 8.3.0 - 8.3.8
- Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /in/oHf6l on line 3 string(0) ""
- Output for 8.0.0 - 8.0.30
- string(0) ""
- Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
- bool(false)