Add stubs for various intl functions

Closes GH-4819
- Add stubs for idn functions
- Add stubs for grapheme functions
- Add stubs for Spoofchecker
- Add stubs for Normalizer
- Add stubs for ResourceBundle
- Fix arginfos
- Add support for union return types
- Fix arginfo for resourcebundle_create()

1 files changed, 23 insertions, 0 deletions

diff --git a/ext/intl/normalizer/normalizer.stub.php b/ext/intl/normalizer/normalizer.stub.php
new file mode 100644
index 0000000000..f0d55738f6
--- /dev/null
+++ b/ext/intl/normalizer/normalizer.stub.php
@@ -0,0 +1,23 @@
+<?php
+
+class Normalizer
+{
+    /** @return string|false */
+    public static function normalize(string $input, int $form = Normalizer::FORM_C) {}
+
+    /** @return bool */
+    public static function isNormalized(string $input, int $form = Normalizer::FORM_C) {}
+
+#if U_ICU_VERSION_MAJOR_NUM >= 56
+    /** @return string|null */
+    public static function getRawDecomposition(string $input, int $form = Normalizer::FORM_C) {}
+#endif
+}
+
+function normalizer_normalize(string $input, int $form = Normalizer::FORM_C): string|false {}
+
+function normalizer_is_normalized(string $input, int $form = Normalizer::FORM_C): bool {}
+
+#if U_ICU_VERSION_MAJOR_NUM >= 56
+function normalizer_get_raw_decomposition(string $input, int $form = Normalizer::FORM_C): ?string {}
+#endif