The PHP database adds the temperature Celsius (℃) field to what type is displayed on the page = what settings are required

Add the temperature Celsius (℃) field to the PHP database what type is displayed on the page = what settings are required
PHP adds a field of temperature Celsius to a database table what type of field is required to display ℃ (such as -1℃~8℃) on the page?
------Solution--------------------
Can't you do the characters?
------Solution--------------------
You can store it in int
When it's shown, add the ℃.
------Solution--------------------
The contents of the field contain "℃". VarChar type
Otherwise, both int and varchar can

℃ is just a character.
$a =-1;
$b = 8;
echo "{$a}℃~ {$b}℃";

