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title description godocref date publishdate lastmod categories menu keywords signature workson hugoversion relatedfuncs deprecated aliases
replaceRE Replaces all occurrences of a regular expression with the replacement pattern. 2017-02-01 2017-02-01 2020-09-07
functions
docs
parent
functions
regex
strings.ReplaceRE PATTERN REPLACEMENT INPUT [LIMIT]
replaceRE PATTERN REPLACEMENT INPUT [LIMIT]
false

strings.ReplaceRE returns a copy of INPUT, replacing all matches of the regular expression PATTERN with the replacement text REPLACEMENT. The number of replacements can be limited with an optional LIMIT parameter.

{{ replaceRE "^https?://([^/]+).*" "$1" "http://gohugo.io/docs" }}` → "gohugo.io"
{{ "http://gohugo.io/docs" | replaceRE "^https?://([^/]+).*" "$1" }}` → "gohugo.io"
{{ replaceRE "a+b" "X" "aabbaabbab" 1 }} → "Xbaabbab"

{{% note %}} Hugo uses Go's Regular Expression package, which is the same general syntax used by Perl, Python, and other languages but with a few minor differences for those coming from a background in PCRE. For a full syntax listing, see the GitHub wiki for re2.

If you are just learning RegEx, or at least Go's flavor, you can practice pattern matching in the browser at https://regex101.com/. {{% /note %}}