PHP-camelCasing的preg_replace_callback

Question

我有一个具有以下内容的文件

“ aa_bb”：“ foo”

“ pp_Qq”：“栏”

“ Xx_yY”：“ foobar”

而且我想将左侧的内容转换为camelCase

“ aaBb”：“ foo”

“ ppQq”：“栏”

“ xxYY”：“ foobar”

和代码：

// selects the left part
$newfileContents = preg_replace_callback("/\"(.*?)\"(.*?):/", function($matches) {      
    // selects the characters following underscores
    $matches[1] = preg_replace_callback("/_(.?)/", function($matches) {
        //removes the underscore and uppercases the character
        return strtoupper($matches[1]);
    }, $matches[1]);

    // lowercases the first character before returning
    return "\"".lcfirst($matches[1])."\" : ".$matches[2];
}, $fileContents);

此代码可以简化吗？

Answer 1

<?php
$fileContents = '
"aa_bb" : "foo"

"pp_Qq" : "bar"

"Xx_yY" : "foobar"
';

echo "<pre>\n" . $fileContents . \n</pre>";

$newfileContents = preg_replace_callback('/"(.*)"( *):/', function($matches) {      
    // selects the characters between speechmarks
    $matches[1] = preg_replace_callback("/_(.?)/", function($matches) {
        //removes the underscore and uppercasing the first character
        return strtoupper($matches[1]);
    }, $matches[1]);
    // lowercasing the first character
    return '"' . lcfirst($matches[1]) . '" :' . trim($matches[2]);
}, $fileContents);

echo "<pre>\n" . $newfileContents . "\n</pre>";

?>

"aa_bb" : "foo"

"pp_Qq" : "bar"

"Xx_yY" : "foobar"


"aaBb" : "foo"

"ppQq" : "bar"

"xxYY" : "foobar"