将逗号分隔值转换为双引号逗号分隔的字符串
问题描述：
我有一个逗号分隔值，如
I have a comma separated value like
alpha,beta,charlie
如何将其转换为
"alpha","beta","charlie"
使用php的单一功能，而不使用str_replace？ p>
using a single funcion of php without using str_replace?
答
或者Richard Parnaby-King的功能（较短）：
Alternatively to Richard Parnaby-King's function (shorter):
function addQuotes($string) {
return '"'. implode('","', explode(',', $string)) .'"';
}
echo addQuotes('alpha,beta,charlie'); // = "alpha","beta","charlie"