Online PHP editor | output for FNniM

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: bool(false) Fatal error: Uncaught ValueError: mb_convert_encoding(): Argument #2 ($to_encoding) must be a valid encoding, "UTF-8*" given in /in/FNniM:3 Stack trace: #0 /in/FNniM(3): mb_convert_encoding('\xF0\xA0\x80\x8B ', 'UTF-8*', 'UTF-8') #1 {main} thrown in /in/FNniM on line 3
Process exited with code 255.
Output for 5.3.4 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33: bool(false) Warning: mb_convert_encoding(): Unknown encoding "UTF-8*" in /in/FNniM on line 3 bool(false)
Output for 4.3.5 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.3: int(0) Warning: mb_convert_encoding(): Unknown encoding "UTF-8*" in /in/FNniM on line 3 bool(false)
Output for 4.3.2 - 4.3.4: int(1) Warning: mb_convert_encoding(): Unknown encoding "UTF-8*" in /in/FNniM on line 3 bool(false)
Output for 4.3.0 - 4.3.1: int(1) Warning: mb_convert_encoding() [http://www.php.net/function.mb-convert-encoding]: Unknown encoding "UTF-8*" in /in/FNniM on line 3 bool(false)