PHP Regex - match attribute and value in string - php

Question

I have an array of possible attributes:
$attributes = ['color','size'];
Part of my URL looks like this:
color-light-grey-size-xs
I would need to get an array of attributes and their values, ie:
$values = [
'color' => 'light-grey',
'size' => 'xs'
]
Is that doable with regex?

Answer 1

A Regular Expression which you have to feed its cluster of attributes ORed:
(\w++)(?>-(\w+-?(?(?!color|size)(?-1))*))
^^^^^^^^^^
Regex live demo
PHP code:
$str = "color-light-grey-test-size-xs";
$attrs = ['color', 'size'];
$array = [];
preg_replace_callback(
"/(\w++)(?>-(\w+-?(?(?!" . implode("|", $attrs) . ")(?-1))*))/",
function($matches) use (&$array) {
$array[$matches[1]] = rtrim($matches[2], '-');
},
$str
);
print_r($array);
PHP live demo
Note: Order is not important at all.

Answer 2

I will tell you something.
ONLY if you know that first value is color and second value is size you can match between it like:
\bcolor\-([\w\d\-]+)-size-([\w\d\-]+)\b
You will get array of 2 matches for color $1 and for size $2
BUT if you don't know how your URL will look, you are in big problem.
You must know what you expect for all URL's and made matches for every combination.
Here is live example: https://regex101.com/r/3daBXx/1