URI Wildcard Matching

api.php

<?php
declare(strict_types=1);

/*
* Test if pattern is like users/{id}/comments/{comment_id}
* and create variables if url is satisfies pattern
* 
* example: 
*   pattern: users/{id}/comments/{comment_id}
*   uri: /users/4/comments/5 
*   return: [
*      'pattern' => "users/{id}/comments/{comment_id}",
*      'uri' => "/users/4/comments/5",
*      'vars' => ['id','comment_id'],
*      'values' => [4, 5],
*    ]
*/
function compareUri($uri, $pattern)
{
    // does pattern have brackets?
    $hasBrackets = preg_match_all('/{(.+)}/', $pattern, $vars);
    if ($hasBrackets) {
        // replace users/{id}/comments/{comment_id} into regex
        $newPattern = preg_replace('/{.+?}/m', '([^/{}]+)', $pattern);
        
        // if a url is like /users/4/comments/5
        $passesNewPattern = preg_match("~^".$newPattern."$~", $uri, $values);
        if ($passesNewPattern) {
            //remove first array item
            array_shift($values);
          
            return [
                'pattern' => $pattern,
                'uri' => $uri,
                'vars' => $vars,
                'values' => array_values($values),
            ];
        }
    }
    return [];
}