$x = 27; $y = "Selena Sol";
we say something like the following:
$age = 27; $full_name = "Selena Sol";
Though it is not necessary that you make your scalar variable names descriptive (sometimes it can mean a lot more typing), I recommend that you do your best to choose names that will clearly communicate the function of the variable to you and to others a month or a year down the line.
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