The glyph is a compatibility version of the glyph Glyph for U+03C6Greek Small Letter Phi. 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+03D5 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
Phi (; uppercase Φ, lowercase φ or ϕ; Ancient Greek: ϕεῖpheî[pʰéî̯]; Modern Greek: φιfi[fi]) is the twenty-first letter of the Greek alphabet.
In Archaic and Classical Greek (c. 9th to 4th century BC), it represented an aspirated voiceless bilabial plosive ([pʰ]), which was the origin of its usual romanization as ⟨ph⟩. During the later part of Classical Antiquity, in Koine Greek (c. 4th century BC to 4th century AD), its pronunciation shifted to a voiceless bilabial fricative ([ɸ]), and by the Byzantine Greek period (c. 4th century AD to 15th century AD) it developed its modern pronunciation as a voiceless labiodental fricative ([f]).
The romanization of the Modern Greek phoneme is therefore usually ⟨f⟩.
It may be that phi originated as the letter qoppa (Ϙ, ϙ), and initially represented the sound /kʷʰ/ before shifting to Classical Greek [pʰ]. In traditional Greek numerals, phi has a value of 500 (φʹ) or 500,000 (͵φ). The Cyrillic letter Ef (Ф, ф) descends from phi.
Like other Greek letters, lowercase phi (encoded as the Unicode character U+03C6φGREEK SMALL LETTER PHI) is used as a mathematical or scientific symbol. Some uses require the old-fashioned 'closed' glyph, which is separately encoded as the Unicode character U+03D5ϕGREEK PHI SYMBOL.
Representations
System
Representation (click value to copy)
Nº
981
UTF-8
CF 95
UTF-16
03 D5
UTF-32
00 00 03 D5
URL-Quoted
%CF%95
HTML hex reference
ϕ
Wrong windows-1252 Mojibake
Ï•
HTML named entity
ϕ
HTML named entity
ϕ
HTML named entity
ϕ
Encoding: GB18030 (hex bytes)
81 30 CD 31
LATEX
\phi
Adobe Glyph List
phi1
Adobe Glyph List
phisymbolgreek
RFC 5137
\u'03D5'
Bash and Zsh inside echo -e
\u03D5
C and C++
\u03D5
C#
\u03D5
CSS
\0003D5
Excel
=UNICHAR(981)
Go
\u03D5
JavaScript
\u03D5
Modern JavaScript since ES6
\u{3d5}
JSON
\u03D5
Java
\u03D5
Lua
\u{3D5}
Matlab
char(981)
Perl
"\x{3D5}"
PHP
\u{3d5}
PostgreSQL
U&'\03D5'
PowerShell
`u{3D5}
Python
\u03D5
Ruby
\u{3d5}
Rust
\u{3d5}
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