Online PHP editor | output for GDZDN

Output for 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Warning: iconv_mime_encode(): Wrong encoding, conversion from "ISO-8859-1" to "UTF-8" is not allowed in /in/GDZDN on line 11 Subject: =?UTF-8?Q?Pr=C3=BCfung=20Pr=C3=BCfung?=
Output for 7.0.0 - 7.0.11, 7.3.32 - 7.3.33, 7.4.33, 8.0.13: Fatal error: Uncaught Error: Call to undefined function iconv_mime_encode() in /in/GDZDN:11 Stack trace: #0 {main} thrown in /in/GDZDN on line 11
Process exited with code 255.
Output for 5.6.28, 7.0.14 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 8.0.0 - 8.0.12: Subject: =?UTF-8?Q?Pr=C3=83=C2=BCfung=20Pr=C3=83=C2=BCfung?= Subject: =?UTF-8?Q?Pr=C3=BCfung=20Pr=C3=BCfung?=
Output for 7.4.26 - 7.4.32: Notice: iconv_mime_encode(): Wrong charset, conversion from `ISO-8859-1' to `UTF-8' is not allowed in /in/GDZDN on line 11 Subject: =?UTF-8?Q?Pr=C3=BCfung=20Pr=C3=BCfung?=
Output for 5.5.35 - 5.5.38, 5.6.0 - 5.6.26: Fatal error: Call to undefined function iconv_mime_encode() in /in/GDZDN on line 11
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.34: Subject: =?UTF-8?Q?Pr=C3=83=C2=BCfung=20Pr=C3=83=C2=BCfung?= Subject: =?UTF-8?Q?Pr=C3=83=C2=BCfung=20Pr=C3=83=C2=BCfung?=
Output for 4.4.5 - 4.4.9: Fatal error: Call to undefined function: iconv_mime_encode() in /in/GDZDN on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4: Fatal error: Call to undefined function: iconv_mime_encode() in /in/GDZDN on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1: Fatal error: Call to undefined function: iconv_mime_encode() in /in/GDZDN on line 11