Undefined Character (U+FDFF)

Block:	Arabic Presentation Forms-A, U+FB50 - U+FDFF^[1]
Plane:	Basic Multilingual Plane, U+0000 - U+FFFF^[1]
HTML Entity:	`﷿` `﷿`
UTF-8 Encoding:	`0xEF 0xB7 0xBF`
UTF-16 Encoding:	`0xFDFF`
UTF-32 Encoding:	`0x0000FDFF`

References