Whois & Analysis for regexr.com

Syntax highlighting is a feature of text editors that are used for programming, scripting, or markup languages, such as HTML.

The feature displays text, especially source code, in different colors and fonts according to the category of terms.

This feature facilitates writing in a structured language such as a programming language or a markup language as both structures and syntax errors are visually distinct.

Highlighting does not affect the meaning of the text itself; it is intended only for human readers.

Perl Compatible Regular Expressions (PCRE) is a regular expression C library inspired by the regular expression capabilities in the Perl programming language.

Philip Hazel started writing PCRE in summer 1997.

PCRE's syntax is much more powerful and flexible than either of the POSIX regular expression flavors and than that of many other regular-expression libraries.

PHP is a server-side scripting language designed primarily for web development but also used as a general-purpose programming language.

Originally created by Rasmus Lerdorf in 1994, the PHP reference implementation is now produced by The PHP Development Team.

PHP originally stood for Personal Home Page, but it now stands for the recursive acronym PHP: Hypertext Preprocessor.

A regular expression, regex or regexp (sometimes called a rational expression) is, in theoretical computer science and formal language theory, a sequence of characters that define a search pattern.

Usually this pattern is then used by string searching algorithms for "find" or "find and replace" operations on strings.

A cheat sheet (also cheatsheet) or crib sheet is a concise set of notes used for quick reference.

Cheat sheets are so named because they may be used by students without the instructor's knowledge to cheat on a test.

However, at higher levels of education where rote memorization is not as important as in basic education, students may be permitted to consult their own notes during the exam (which is not considered cheating).

The act of preparing a cheat sheet is also an educational exercise, thus students are sometimes only allowed to use cheat sheets they have written themselves.

In such usage, a cheat sheet is a physical piece of paper, often filled with equations and/or facts in compressed writing.

Modern students often print cheat sheets in extremely small font, fitting an entire page of notes in the palm of their hands during the exam.