Fix code for invalid locale for number class. if provided locale is not valid throws exception

src/Illuminate/Support/Number.php

@@ -4,6 +4,7 @@
 
 use Illuminate\Support\Traits\Macroable;
 use NumberFormatter;
+use ResourceBundle;
 use RuntimeException;
 
 class Number
@@ -24,6 +25,23 @@ class Number
      */
     protected static $currency = 'USD';
 
+    /**
+     * @param  string  $locale
+     * @return string
+     *
+     * @throws \InvalidArgumentException
+     */
+    public static function validateLocale(string $locale): string
+    {
+        $availableLocales = ResourceBundle::getLocales('');
+
+        if (! in_array($locale, $availableLocales, true)) {
+            throw new \InvalidArgumentException("Locale [$locale] is invalid");
+        }
+
+        return $locale;
+    }
+
     /**
      * Format the given number according to the current locale.
      *
@@ -32,11 +50,15 @@ class Number
      * @param  int|null  $maxPrecision
      * @param  string|null  $locale
      * @return string|false
+     *
+     * @throws \InvalidArgumentException
      */
     public static function format(int|float $number, ?int $precision = null, ?int $maxPrecision = null, ?string $locale = null)
     {
         static::ensureIntlExtensionIsInstalled();
 
+        $locale = $locale ? static::validateLocale($locale) : null;
+
         $formatter = new NumberFormatter($locale ?? static::$locale, NumberFormatter::DECIMAL);
 
         if (! is_null($maxPrecision)) {

tests/Support/SupportNumberTest.php

@@ -314,4 +314,14 @@ public function testTrim()
         $this->assertSame(12.3456789, Number::trim(12.3456789));
         $this->assertSame(12.3456789, Number::trim(12.34567890000));
     }
+
+    /**
+     * Test invalid locale input in format method.
+     */
+    public function testInvalidLocale()
+    {
+        $this->expectException(\InvalidArgumentException::class);
+        $this->expectExceptionMessage('Locale [invalid-locale] is invalid');
+        Number::format(1234.56, locale: 'invalid-locale');
+    }
 }