GeSHi - Generic Syntax Highlighter

Xorg.conf

GeSHi 1.0.8.11 is the current stable release, with eighteen new languages and bug fixes over the last release.

GeSHi 1.1.2alpha5 is the current latest version from the development branch, with full C support (see the GeSHi development website).

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Demo

Here you can give GeSHi the ultimate test drive: specify everything about how the outputted source should look. Use this demo to gain an idea of the great functionality that GeSHi provides.

Source Code Input via a text field:

OR via file upload1:

OR a URL online:

Choose a language

Options

Line Numbers Show line numbers beside your code	Wrap overflowing text If you turn this option on, lines will be wrapped when they reach the width of the screen.
Tab width (in spaces) Tabs in your input will be turned into this many spaces (maximum of 20)	Store Your File If you choose this option, your source will be stored in the database so you do not have to upload it again to re-highlight it.2
Highlight inbuilt keywords, data types etc If this option is chosen, keywords, inbuilt functions and data types etc. will be highlighted. Disable this for more speed, but less highlighting.	Strict Mode Strict Mode means that if your language is a scripting language (such as PHP), then highlighting will only be done on the code between appropriate code delimiters (eg <?php, ?>)

Output Styles

Aspect	Colour3	Bold	Italic	Case Sensitive
Default Colour All the text not to be highlighted
Keywords if, while, do etc
Keywords II null, void, true, false etc
Inbuilt Functions/Classes Functions/classes predefined by your language: System, rand() etc
Data Types Keywords that signal a data type: int, double, boolean etc
Comments Comments in your language				4
Escaped Characters Escaped characters in your language: \n, \t, \\ etc
Brackets Brackets: (, ), [, ], {, }
Strings Strings: "hello!", 'hello, world!'
Numbers Literal numbers, including decimal numbers and powers (1, -1.2e6)
Methods and Data Fields Methods and data fields for class languages

Configuration Complete

Notes

Maximum file upload size is 2 megabytes
Your source will be stored for 7 days, then deleted. I don't look at or use any source uploaded, but if you want to be paranoid that's your tough luck ;)
Selecting "Language Default" results in the default colour for a language being chosen. Good for natural looking highlighting, but no doubt you want to play anyway ;)
Yes, comments can be case sensitive. In particular, in basic the word "REM" is a comment, and also comments are used to highlight metacommands/import statements in languages such as Java