This character is a Other Symbol and is commonly used, that is, in no specific script. The character is also known as interrupt and break.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+238A forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
A stop sign is a traffic sign designed to notify drivers that they must come to a complete stop and make sure the intersection (or railroad crossing) is safely clear of vehicles and pedestrians before continuing past the sign. In many countries, the sign is a red octagon with the word STOP, in either English, the national language of that particular country, or both, displayed in white or yellow. The Vienna Convention on Road Signs and Signals also allows an alternative version: a red circle with a red inverted triangle with either a white or yellow background, and a black or dark blue STOP. Some countries may also use other types, such as Japan's inverted red triangle stop sign. Particular regulations regarding appearance, installation, and compliance with the signs vary by some jurisdictions.
Representations
System
Representation (click value to copy)
Nº
9098
UTF-8
E2 8E 8A
UTF-16
23 8A
UTF-32
00 00 23 8A
URL-Quoted
%E2%8E%8A
HTML hex reference
⎊
Wrong windows-1252 Mojibake
⎊
alias
interrupt
alias
break
Encoding: GB18030 (hex bytes)
81 36 F5 32
RFC 5137
\u'238A'
Bash and Zsh inside echo -e
\u238A
C and C++
\u238A
C#
\u238A
CSS
\00238A
Excel
=UNICHAR(9098)
Go
\u238A
JavaScript
\u238A
Modern JavaScript since ES6
\u{238a}
JSON
\u238A
Java
\u238A
Lua
\u{238A}
Matlab
char(9098)
Perl
"\x{238A}"
PHP
\u{238a}
PostgreSQL
U&'\238A'
PowerShell
`u{238A}
Python
\u238A
Ruby
\u{238a}
Rust
\u{238a}
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