Update Php85.php

Author: alexander-schranz

src/Php85/Php85.php

@@ -36,6 +36,52 @@ public static function get_exception_handler(): ?callable
     }
 
     public static function locale_is_right_to_left(string $locale): bool {
-        return (bool) preg_match('/^(?:ar|he|fa|ur|ps|sd|ug|ckb|yi|dv|ku_arab|ku-arab)(?:[_-].*)?$/i', $locale);
+        static $rtlScripts = [
+            'Adlm', 'Arab', 'Armi', 'Hebr', 'Mani', 'Mend', 'Nkoo',
+            'Phnx', 'Rohg', 'Samr', 'Syrc', 'Thaa',
+        ];
+
+        static $languageToLikelyRtlScript = [
+            'ar' => 'Arab', // Arabic
+            'fa' => 'Arab', // Persian (Farsi)
+            'ur' => 'Arab', // Urdu
+            'ps' => 'Arab', // Pashto
+            'sd' => 'Arab', // Sindhi
+            'ug' => 'Arab', // Uyghur
+            'ckb' => 'Arab', // Sorani Kurdish
+            'he' => 'Hebr', // Hebrew
+            'yi' => 'Hebr', // Yiddish
+            'dv' => 'Thaa', // Dhivehi
+            'nqo' => 'Nkoo', // N'Ko
+        ];
+
+        if (empty($locale)) {
+            return false;
+        }
+
+        $localeParts = preg_split('/[_-]/', $locale);
+        $language = strtolower($localeParts[0] ?? '');
+        $script = null;
+
+        foreach ($localeParts as $part) {
+            if (strlen($part) === 4 && ctype_alpha($part)) {
+                $script = ucfirst(strtolower($part));
+                break;
+            }
+        }
+
+        if ($script === null) {
+            $script = $languageToLikelyScript[$language] ?? null;
+        }
+
+        if ($script === null) {
+            if (in_array($language, ['ar', 'he', 'fa', 'ur', 'ps', 'sd', 'ug', 'ckb', 'yi', 'dv'])) {
+                 return true;
+            }
+
+            return false;
+        }
+
+        return in_array($script, $rtlScripts, true);
     }
 }