bash ANSI 问题：“\x1B[?25h”和“\x1BE”
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ANSI questions: "\x1B[?25h" and "\x1BE"
提问by neubert
- What does
"\x1B[?25h"do? How is
"\x1BE"different from"\n"? According to http://ascii-table.com/ansi-escape-sequences-vt-100.phpit "moves to next line"? Seems like that's what"\n"does?I tried
echo "xxx\nxxx\n"andecho "xxx\x1BExxx\n"in PHP and they both output the same thing.
- 有什么作用
"\x1B[?25h"？ 如何
"\x1BE"不同"\n"？根据http://ascii-table.com/ansi-escape-sequences-vt-100.php它“移动到下一行”？好像那是什么"\n"？我在 PHP 中尝试过
echo "xxx\nxxx\n"，echo "xxx\x1BExxx\n"它们都输出相同的内容。
Any ideas?
有任何想法吗？
Thanks!
谢谢！
回答by cmbuckley
These are ANSI escape sequences (also known as VT100 codes) are an early standardisation of control codes pre-dating ASCII.
这些是 ANSI 转义序列（也称为 VT100 代码），是早于 ASCII 的控制代码的早期标准化。
The escape sequence \x1BE, or Esc+E, is NEL or "Next line", and is used on older terminals and mainframes to denote CR+LF, or \r\n.
转义序列\x1BE或Esc+E是 NEL 或“下一行”，在较旧的终端和大型机上用于表示 CR+LF 或\r\n。
The escape sequence \x1B[(Esc+[) is an example of a Control Sequence Introducer. (\x9Bis another single-character CSI.) The control sequence ?25hfollowing it is used to show the cursor.
转义序列\x1B[( Esc+ [) 是控制序列介绍器的一个示例。(\x9B是另一个单字符 CSI。)?25h它后面的控制序列用于显示光标。
Most terminals will support these control codes; to enter escape sequences you can type Ctrl+V, Ctrl+[which should render as ^[(the C0 code for ESC), followed by the escape code.
大多数终端将支持这些控制代码；要输入转义序列，您可以键入Ctrl+ V, Ctrl+ [，它应该呈现为^[（ESC 的 C0 代码），然后是转义代码。
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