What unique character to use for explode?

Question

PHP

I connect the data I need into a string through the delimiter ";" Further I receive: And there was a problem that in $var2 there can be any text and there if there is a symbol ";" , then it breaks incorrectly. What kind of unique character (or set of characters) can you come up with that will definitely not be used in the text? Or how to solve it?
$getJson = sprintf("%s;%s, $var, $var2);
explode(';', $getJson);

Answer 1

No, just work with JSON as with JSON, and do not fence the bike.

$json = json_encode([$var, $var2]);
$array = json_decode($json);