From 39fc4228456f8e73430822da1708c4d6a73ecaae Mon Sep 17 00:00:00 2001
From: "Christoph M. Becker" <cmbecker69@gmx.de>
Date: Wed, 17 Feb 2021 14:05:28 +0100
Subject: [PATCH] Fix #80763: msgfmt_format() does not accept DateTime
 references

`intl_zval_to_millis()` needs to cater to references.
---
 ext/intl/common/common_date.cpp |  4 ++++
 ext/intl/tests/bug80763.phpt    | 16 ++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 ext/intl/tests/bug80763.phpt

diff --git a/ext/intl/common/common_date.cpp b/ext/intl/common/common_date.cpp
index b3e8a30f68905..207b81aa6f521 100644
--- a/ext/intl/common/common_date.cpp
+++ b/ext/intl/common/common_date.cpp
@@ -175,6 +175,7 @@ U_CFUNC double intl_zval_to_millis(zval *z, intl_error *err, const char *func)
 		return ZEND_NAN;
 	}
 
+try_again:
 	switch (Z_TYPE_P(z)) {
 	case IS_STRING:
 		type = is_numeric_string(Z_STRVAL_P(z), Z_STRLEN_P(z), &lv, &rv, 0);
@@ -227,6 +228,9 @@ U_CFUNC double intl_zval_to_millis(zval *z, intl_error *err, const char *func)
 			efree(message);
 		}
 		break;
+	case IS_REFERENCE:
+		z = Z_REFVAL_P(z);
+		goto try_again;
 	default:
 		spprintf(&message, 0, "%s: invalid PHP type for date", func);
 		intl_errors_set(err, U_ILLEGAL_ARGUMENT_ERROR,
diff --git a/ext/intl/tests/bug80763.phpt b/ext/intl/tests/bug80763.phpt
new file mode 100644
index 0000000000000..bd5aeb45c6004
--- /dev/null
+++ b/ext/intl/tests/bug80763.phpt
@@ -0,0 +1,16 @@
+--TEST--
+Bug #80763 (msgfmt_format() does not accept DateTime references)
+--SKIPIF--
+<?php
+if (!extension_loaded('intl')) die('skip intl extension not available');
+?>
+--FILE--
+<?php
+$today = new DateTime('2021-02-17 12:00:00');
+$formatter = new \MessageFormatter('en_US', 'Today is {today, date, full}.');
+$params = ['today' => $today];
+array_walk($params, fn() => 1);
+var_dump($formatter->format($params));
+?>
+--EXPECT--
+string(38) "Today is Wednesday, February 17, 2021."