正则表达式在 PhpStorm/Webstorm (Intellij-IDEA) 中用小写字母替换大写

Question

Hey I have to change in a lot of places camelCase to snail_case.

I have following example:

billingAddress
paymentDetails

I tried to use find and replace with regex in PhpStorm

In 'find' input field I put in:

([A-Z])

In 'replace' input field I put in:

_\L$1

Result I got:

billing_LAddress
payment_LDetails

What do I need to change in order to get following result:

billing_address
payment_details

Answer 1

First open Find and Replace functionality with CTRL + R and then check the boxes Match Case and Regex (and if necessary In Selection ):

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1. To replace camelCase to snail_case as in in the question:

find: ([AZ])
replace: _\\l$1

someThing -> some_thing

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2. To replace UPPERCASE words to lowercase words use \\L

find: (\\w*)
replace: \\L$1

SOMETHING -> something

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3. To replace lowercase words to UPPERCASE words use \\U

find: (\\w*)
replace: \\U$1

something -> SOMETHING

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4. To replace first character of words with lowercase use \\l

find: (\\w*)
replace: \\l$1

Something -> something

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5. To replace first character of words with UPPERCASE use \\u\u003c/code>

find: (\\w*)
replace: \\u$1\u003c/code>

something -> Something

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Note: Add some extra boundaries

You get best results by adding some additional boundaries that suit your specific case, for example single ' or double quotes " or line breaks \\n

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Regex Documentation

Check for details on additional Regular Expression Syntax the documentation for PHPStorm or WebStorm .

Answer 2

根据PHPstorm 文档和我的测试，这现在有效：

_\l$1

Answer 3

What do I need to change in order to get following result:

Nothing/Everything. It's simply not supported ATM.

https://youtrack.jetbrains.com/issue/IDEA-70451 -- watch this ticket (star/vote/comment) to get notified on progress.

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UPDATE: This functionality is now implemented and available since PhpStorm v10.