Converting Comma Separated Value to Double Quotes comma separated string

Question

I have a comma separated value like

alpha,beta,charlie

how can I convert it to

"alpha","beta","charlie"

using a single function in php without using str_replace?

Answer 1

Alternatively to Richard Parnaby-King's function (shorter):

function addQuotes($string) {
    return '"'. implode('","', explode(',', $string)) .'"';
}

echo addQuotes('alpha,beta,charlie'); // = "alpha","beta","charlie"