I have a variable called $value that contains a string with a css expression. It can be a value or a function:
rgb( 25, 128, 128 );
, transform( -50% -50% );
, bottom 50px right 100px;
, #198080;
, bold;
, 1px solid red;
I want to be able to identify if the expression contains a function or a string
$real_value = (is_numeric($value)) ?
$value :
(is_string($value) ?
(preg_match('/^\w/', $value) ? $value : '"' . $value . '"') :
'"'. $value . '"');
The idea is to assign to $real_value
the value inside quotation marks like this: "#198080";
or this "bottom 50px right 100px";
but if it is a function, just return the same expression.
I started creating my regular expression, but I can’t go past the first parentheses without breaking it: /^\w\-?\w?\(/
So I need to create a regular expression that checks if the string has the structure of a css function. There are not many of them (https://www.w3schools.com/cssref/css_functions.php) or just write one that checks for the parentheses
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