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31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
---
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title: replacere
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# linktitle: replaceRE
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description: Replaces all occurrences of a regular expression with the replacement pattern.
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godocref:
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date: 2017-02-01
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publishdate: 2017-02-01
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lastmod: 2017-04-30
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categories: [functions]
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menu:
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docs:
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parent: "functions"
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#tags: [regex]
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signature: ["replaceRE PATTERN REPLACEMENT INPUT"]
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workson: []
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hugoversion:
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relatedfuncs: []
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deprecated: false
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aliases: []
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---
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```golang
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{{ replaceRE "^https?://([^/]+).*" "$1" "http://gohugo.io/docs" }}` → "gohugo.io"
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{{ "http://gohugo.io/docs" | replaceRE "^https?://([^/]+).*" "$1" }}` → "gohugo.io"
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```
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{{% note %}}
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Hugo uses Golang's [Regular Expression package](https://golang.org/pkg/regexp/), 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](https://github.com/google/re2/wiki/Syntax).
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If you are just learning RegEx, or at least Golang's flavor, you can practice pattern matching in the browser at <https://regex101.com/>.
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{{% /note %}}
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