This character is a Lowercase Letter and is mainly used in the Latin script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. The word that U+0278 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with 14 other glyphs.
The Wikipedia has the following information about this codepoint:
The voiceless bilabial fricative is a type of consonantal sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨ɸ⟩, a Latinised form of the Greek letter Phi.
Representations
System
Representation (click value to copy)
Nº
632
UTF-8
C9 B8
UTF-16
02 78
UTF-32
00 00 02 78
URL-Quoted
%C9%B8
HTML hex reference
ɸ
Wrong windows-1252 Mojibake
ɸ
Encoding: GB18030 (hex bytes)
81 30 AF 35
LATEX
\textphi
AGL: Latin-5
uni0278
Adobe Glyph List
philatin
RFC 5137
\u'0278'
Bash and Zsh inside echo -e
\u0278
C and C++
\u0278
C#
\u0278
CSS
\000278
Excel
=UNICHAR(632)
Go
\u0278
JavaScript
\u0278
Modern JavaScript since ES6
\u{278}
JSON
\u0278
Java
\u0278
Lua
\u{278}
Matlab
char(632)
Perl
"\x{278}"
PHP
\u{278}
PostgreSQL
U&'\0278'
PowerShell
`u{278}
Python
\u0278
Ruby
\u{278}
Rust
\u{278}
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