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通过使用@ridgerunner 在这个问题中建议的解决方案，我设法实现了一个将驼峰大小写转换为单词的函数：

使用php preg_match（正则表达式）将camelCase单词拆分为单词

但是，我还想处理这样的嵌入式缩写：

'hasABREVIATIONEmbedded' 转换为 'Has ABREVIATION Embedded'

我想出了这个解决方案：

    <?php 

    function camelCaseToWords($camelCaseStr)
    {

        // Convert: "TestASAPTestMore" to "TestASAP TestMore"

        $abreviationsPattern = '/' . // Match position between UPPERCASE "words"
            '(?<=[A-Z])' . // Position is after group of uppercase,
            '(?=[A-Z][a-z])' . // and before group of lowercase letters, except the last upper case letter in the group.
            '/x';
        $arr = preg_split($abreviationsPattern, $camelCaseStr);
        $str = implode(' ', $arr);

        // Convert "TestASAP TestMore" to "Test ASAP Test More"
        $camelCasePattern = '/' . // Match position between camelCase "words".
            '(?<=[a-z])' . // Position is after a lowercase,
            '(?=[A-Z])' . // and before an uppercase letter.
            '/x';

        $arr = preg_split($camelCasePattern, $str);
        $str = implode(' ', $arr);

        $str = ucfirst(trim($str));
        return $str;
    }

    $inputs = array(
    'oneTwoThreeFour',
    'StartsWithCap',
    'hasConsecutiveCAPS',
    'ALLCAPS',
    'ALL_CAPS_AND_UNDERSCORES',
    'hasABREVIATIONEmbedded',
    );

    echo "INPUT";

    foreach($inputs as $val) {
        echo "'" . $val . "' translates to '" . camelCaseToWords($val). "'\n";
    }

输出是：

    INPUT'oneTwoThreeFour' translates to 'One Two Three Four'
    'StartsWithCap' translates to 'Starts With Cap'
    'hasConsecutiveCAPS' translates to 'Has Consecutive CAPS'
    'ALLCAPS' translates to 'ALLCAPS'
    'ALL_CAPS_AND_UNDERSCORES' translates to 'ALL_CAPS_AND_UNDERSCORES'
    'hasABREVIATIONEmbedded' translates to 'Has ABREVIATION Embedded'

它按预期工作。

我的问题是：我可以结合 2 个正则表达式 $abreviationsPattern 和 camelCasePattern 来避免运行 preg_split() 函数两次吗？

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1 回答 1

1

这些总是要解决的有趣难题；我已将案例范围缩小到两个：

  1. 检测以大写字母开头后跟小写字母（但前面没有单词边界或主题开头）的单词 -(?<!\b)[A-Z][a-z]+

  2. 检测从小写到大写的转换 -(?<=[a-z])[A-Z]

    function camelFix($str)
{
    return preg_replace_callback('/(?<!\b)[A-Z][a-z]+|(?<=[a-z])[A-Z]/', function($match) {
        return ' '. $match[0];
    }, $str);
}

它适用于您提供的输入；它可能会失败我没有预见到的情况:)

于 2013-06-28T10:20:18.787 回答