我使用@ridgerrunner在这个问题中建议的解决方案，成功地实现了一个将camel大小写转换为单词的函数：
使用php preg_match（正则表达式）将camelBase单词拆分为单词
然而，我也想处理这样的嵌入式设备：
"hasABREVIATIONEmbedded"翻译为"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";
}
输出为：
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：我可以组合两个正则表达式$abrevisionsPattern和camelCasePattern吗这样我就可以避免运行preg_split（）函数两次了？
这些谜题总是很有趣的；我已经把案例缩小到两个：
-
检测以大写字母和小写字母开头的单词（但前面没有单词边界或主题开头）-
(?<!'b)[A-Z][a-z]+ -
检测从小写到大写的转换-
(?<=[a-z])[A-Z]function camelFix($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；它可能会出现我没有预见到的失败情况：）