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Regular Expression Replacement

Tool to find and replace by regular expression (regexp/regex) in text, message, or document to perform the corresponding replacements.

Regexp Search and Remplace

Answers to Questions

What is a regular expression replacement?

It is a search and replace operation, but using a search by regular expression (or rational expression or regexp) that makes it possible to extract subsets of strings respecting a precise description. Regular expression replacements allow the ability of this search to be coupled with replacement capabilities based on the results of the search.

Example: ([a-z])[a-z] describes a set of any 2 consecutive letters. Replacing with $1 makes it possible to retain only the first letter.

What is a back-reference?

Parentheses are used to number and reference their contents. Each captured parenthesis encountered will thus be associated with a back reference.

A back reference is therefore a reference to a capturing submask defined previously (in parentheses).

The reference is noted with a backslash or with a dollar followed by a number greater than 0 and often limited to 9 or 99).

Example: The regex ((A)BC) will capture ABC in \1 and A in \2.

Source code

dCode retains ownership of the source code of the script Regular Expression Replacement online. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, Matlab, etc.) which dCode owns rights will not be given for free. To download the online Regular Expression Replacement script for offline use on PC, iPhone or Android, ask for price quote on contact page !

Questions / Comments

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Source : https://www.dcode.fr/regexp-replacement