代码规范之驼峰vs下划线风格转换方案

转换书写风格的方案均基于递归深度遍历,对key值重新建构,将value值重新赋值。

让我们一起来看看以下详细代码实现。

  1. 下划线风格=>驼峰风格
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<?php
/**
* @static 数组键名翻译成驼峰写法
* @param $in 源数组
* @return array 输出数组
*/
public static function arrKeysToCamelCase($in)
{
if(empty($in)||!is_array($in))
return $in;
$reCopyRes = array();
foreach($in as $key=>$val)
{
$reKey = self::ucFirstWord($key);
if(!is_array($val)){
$reCopyRes[$reKey] = $val;
}else{
$reCopyRes[$reKey] = self::arrKeysToCamelCase($val);
}
}
return $reCopyRes;
}

/**
* @static 将单词的首字母转换成大写(首单词除外)
* @param $word 源单词字符串
* @return string 输出单词字符串
*/
public static function ucFirstWord($word)
{
if(!is_string($word)){
return $word;
}else{
$wordArr = explode('_',$word);
if(!empty($wordArr)){
$index = 0;
foreach($wordArr as &$wd)
{
if($index==0){
$index++;
continue;
}
$wd = ucfirst($wd);
}
$outStr = implode('',$wordArr);
return $outStr;
}else{
return $word;
}
}
}
  1. 驼峰风格=>下划线风格
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<?php
/**
* @static 数组键名翻译成下划线写法
* @param $in 源数组
* @return array 输出数组
*/
public static function arrKeysToUnderlineCase($in)
{
if(empty($in)||!is_array($in))
return $in;
$reCopyRes = array();
foreach($in as $key=>$val)
{
$reKey = self::lcFirstWord($key);
if(!is_array($val)){
$reCopyRes[$reKey] = $val;
}else{
$reCopyRes[$reKey] = self::arrKeysToUnderlineCase($val);
}
}
return $reCopyRes;
}

/**
* @static 将单词的首字母转换成小写
* @param $word 源单词字符串
* @return string 输出单词字符串
*/
public static function lcFirstWord($word)
{
if(!is_string($word)){
return $word;
}else{
preg_match_all('/([a-z0-9_]*)([A-Z][a-z0-9_]*)?/',$word,EG_PATTERN_ORDER);
if(!empty($matches)){
$strPattern1 = !empty($matches[1][0])?trim($matches[1][0]):'';
$subMatch = array_filter($matches[2]);
$strPattern2 = !empty($subMatch)?trim(implode('_',$subMatch)):'';
$strPattern2 = !empty($strPattern2) && !empty($strPattern1)?'_'.2:$strPattern2;
$outStr = strtolower($strPattern1.$strPattern2);
}else{
$outStr = $word;
}
return $outStr;
}
}