Regular Expressions 101

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Regular Expressions 101

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  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
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  • Unit Tests (4)
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An explanation of your regex will be automatically generated as you type.

Regular Expression

Regex Versions

`

Delimiters

`
gm

Regex Flags

Unit Tests

given the string https://apple.com/semlps/401k-retirement… assert that regex does match
given the string https://wifi.com/semlps/401k-retirement-… assert that regex does not match
given the string https://letstryiat.com/semlps/avs/electr… assert that regex does match
given the string https://letstryiat.com/semlps/avs/electr… assert that regex does not match

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