[8.x] Fix casting to string on PHP 8.1 (#39033)

* Fix casting to string on PHP 8.1

* Update tests

* Update Str.php

Co-authored-by: Taylor Otwell <[email protected]>

Author: driesvints

src/Illuminate/Support/Str.php

@@ -253,11 +253,15 @@ public static function is($pattern, $value)
     {
         $patterns = Arr::wrap($pattern);
 
+        $value = (string) $value;
+
         if (empty($patterns)) {
             return false;
         }
 
         foreach ($patterns as $pattern) {
+            $pattern = (string) $pattern;
+
             // If the given value is an exact match we can of course return true right
             // from the beginning. Otherwise, we will translate asterisks and do an
             // actual pattern match against the two strings to see if they match.

tests/Support/SupportStrTest.php

@@ -272,6 +272,10 @@ public function testIs()
 
         // empty patterns
         $this->assertFalse(Str::is([], 'test'));
+
+        $this->assertFalse(Str::is('', 0));
+        $this->assertFalse(Str::is([null], 0));
+        $this->assertTrue(Str::is([null], null));
     }
 
     /**