文字列を配列に変換
$string = "a,b,c,d,e,f";
print_r(explode(",", $string));
配列を文字列に変換
$array = array('lastname', 'email', 'phone');
$comma_separated = implode(",", $array);
文字列を配列に変換
$string = "a,b,c,d,e,f";
print_r(explode(",", $string));
配列を文字列に変換
$array = array('lastname', 'email', 'phone');
$comma_separated = implode(",", $array);