N°8834 - Add compatibility with PHP 8.4 (#819)

* N°8834 - Add compatibility with PHP 8.4

* Rollback of scssphp/scssphp version upgrade due to compilation error

lib/symfony/polyfill-intl-grapheme/Grapheme.php

@@ -26,6 +26,7 @@ namespace Symfony\Polyfill\Intl\Grapheme;
  * - grapheme_strrpos  - Find position (in grapheme units) of last occurrence of a string
  * - grapheme_strstr   - Returns part of haystack string from the first occurrence of needle to the end of haystack
  * - grapheme_substr   - Return part of a string
+ * - grapheme_str_split - Splits a string into an array of individual or chunks of graphemes
  *
  * @author Nicolas Grekas <p@tchwork.com>
  *
@@ -191,6 +192,37 @@ final class Grapheme
         return mb_strstr($s, $needle, $beforeNeedle, 'UTF-8');
     }
 
+    public static function grapheme_str_split($s, $len = 1)
+    {
+        if (0 > $len || 1073741823 < $len) {
+            if (80000 > \PHP_VERSION_ID) {
+                return false;
+            }
+
+            throw new \ValueError('grapheme_str_split(): Argument #2 ($length) must be greater than 0 and less than or equal to 1073741823.');
+        }
+
+        if ('' === $s) {
+            return [];
+        }
+
+        if (!preg_match_all('/('.SYMFONY_GRAPHEME_CLUSTER_RX.')/u', $s, $matches)) {
+            return false;
+        }
+
+        if (1 === $len) {
+            return $matches[0];
+        }
+
+        $chunks = array_chunk($matches[0], $len);
+
+        foreach ($chunks as &$chunk) {
+            $chunk = implode('', $chunk);
+        }
+
+        return $chunks;
+    }
+
     private static function grapheme_position($s, $needle, $offset, $mode)
     {
         $needle = (string) $needle;