Dec 8, 2025 · Character class: Matches any one of the enclosed characters. You can specify a range of characters by using a hyphen, but if the hyphen appears as the first or last character enclosed in the …

Each character in a regular expression (that is, each character in the string describing its pattern) is either a metacharacter, having a special meaning, or a regular character that has a literal meaning.

Oct 2, 2024 · A phone number regex pattern must include country code but does not have to extract that part even though it must match on string. [] matches specified single character, e.g. [abc] will match …

Apr 12, 2024 · A regular expression (regex) is a sequence of characters that define a search pattern. Here's how to write regular expressions: Start by understanding the special characters used in regex, …

Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.

Jun 1, 2025 · Regular expressions (shortened as "regex") are special strings representing a pattern to be matched in a search operation. They are an important tool in a wide variety of computing …

On each line, in the leftmost column, you will find a new element of regex syntax. The next column, "Legend", explains what the element means (or encodes) in the regex syntax.

Jan 5, 2025 · Here's a quick regular expressions cheat sheet with examples to get started: .: Matches any character except newline. Example: a.c matches abc, adc. \w: Matches a word character (letters, …

Mar 1, 2025 · If you’ve ever needed to find specific text in a large document, validate user input, or extract key information from messy data, you’ve probably encountered regular expressions —often …

Aug 23, 2025 · What Is Regex? Regex (short for regular expression or regexp) is a compact language for describing text patterns. If you’ve ever needed to find, validate, or transform strings at scale, …