From f0acc519e8d2f068a0c9baa90fd560e84b5de9e8 Mon Sep 17 00:00:00 2001
From: Daniel Scherzer <daniel.e.scherzer@gmail.com>
Date: Wed, 12 Aug 2026 11:59:44 -0700
Subject: [PATCH 1/2] Add regression tests for calling `zend_version()`

---
 ext/opcache/tests/zend_version.phpt | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 ext/opcache/tests/zend_version.phpt

diff --git a/ext/opcache/tests/zend_version.phpt b/ext/opcache/tests/zend_version.phpt
new file mode 100644
index 000000000000..e61a0d46cfc6
--- /dev/null
+++ b/ext/opcache/tests/zend_version.phpt
@@ -0,0 +1,27 @@
+--TEST--
+zend_version() should be evaluated at compile time
+--EXTENSIONS--
+opcache
+--INI--
+opcache.enable_cli=1
+opcache.opt_debug_level=0x20000
+--FILE--
+<?php
+
+$v = zend_version();
+var_dump($v);
+
+?>
+--EXPECTF--
+$_main:
+     ; (lines=7, args=0, vars=1, tmps=%d)
+     ; (after optimizer)
+     ; %s.php:%s
+0000 INIT_FCALL 0 %d string("zend_version")
+0001 T1 = DO_ICALL
+0002 ASSIGN CV0($v) T1
+0003 INIT_FCALL 1 %d string("var_dump")
+0004 SEND_VAR CV0($v) 1
+0005 DO_ICALL
+0006 RETURN int(1)
+string(%d) "%s"

From 57e212d53cd2a452668a2a720307463918b77498 Mon Sep 17 00:00:00 2001
From: Daniel Scherzer <daniel.e.scherzer@gmail.com>
Date: Wed, 12 Aug 2026 12:02:19 -0700
Subject: [PATCH 2/2] Mark `zend_version()` as `@compile-time-eval`

---
 Zend/zend_builtin_functions.stub.php  |  5 ++++-
 Zend/zend_builtin_functions_arginfo.h |  4 ++--
 ext/opcache/tests/zend_version.phpt   | 14 ++++++--------
 3 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/Zend/zend_builtin_functions.stub.php b/Zend/zend_builtin_functions.stub.php
index 1d405587145d..16ce7e2be8ca 100644
--- a/Zend/zend_builtin_functions.stub.php
+++ b/Zend/zend_builtin_functions.stub.php
@@ -15,7 +15,10 @@ function exit(string|int $status = 0): never {}
 /** @alias exit */
 function die(string|int $status = 0): never {}
 
-/** @refcount 1 */
+/**
+ * @refcount 1
+ * @compile-time-eval
+ */
 function zend_version(): string {}
 
 /** @forbid-dynamic-calls */
diff --git a/Zend/zend_builtin_functions_arginfo.h b/Zend/zend_builtin_functions_arginfo.h
index b3af43fef340..fc8d8270b016 100644
--- a/Zend/zend_builtin_functions_arginfo.h
+++ b/Zend/zend_builtin_functions_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit zend_builtin_functions.stub.php instead.
- * Stub hash: 64c61862de86d9968930893bf21b516119724064 */
+ * Stub hash: 5d7145b7bc305bb50b45e75c02740206148223b1 */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_clone, 0, 1, IS_OBJECT, 0)
 	ZEND_ARG_TYPE_INFO(0, object, IS_OBJECT, 0)
@@ -315,7 +315,7 @@ static const zend_function_entry ext_functions[] = {
 	ZEND_FE(clone, arginfo_clone)
 	ZEND_FE(exit, arginfo_exit)
 	ZEND_RAW_FENTRY("die", zif_exit, arginfo_die, 0, NULL, NULL)
-	ZEND_FE(zend_version, arginfo_zend_version)
+	ZEND_RAW_FENTRY("zend_version", zif_zend_version, arginfo_zend_version, ZEND_ACC_COMPILE_TIME_EVAL, NULL, NULL)
 #if (PHP_VERSION_ID >= 80600)
 	ZEND_RAW_FENTRY("func_num_args", zif_func_num_args, arginfo_func_num_args, ZEND_FENTRY_FLAGS(0, ZEND_ACC2_FORBID_DYN_CALLS), NULL, NULL)
 #elif (PHP_VERSION_ID >= 80400)
diff --git a/ext/opcache/tests/zend_version.phpt b/ext/opcache/tests/zend_version.phpt
index e61a0d46cfc6..8f37bdc05353 100644
--- a/ext/opcache/tests/zend_version.phpt
+++ b/ext/opcache/tests/zend_version.phpt
@@ -14,14 +14,12 @@ var_dump($v);
 ?>
 --EXPECTF--
 $_main:
-     ; (lines=7, args=0, vars=1, tmps=%d)
+     ; (lines=5, args=0, vars=1, tmps=%d)
      ; (after optimizer)
      ; %s.php:%s
-0000 INIT_FCALL 0 %d string("zend_version")
-0001 T1 = DO_ICALL
-0002 ASSIGN CV0($v) T1
-0003 INIT_FCALL 1 %d string("var_dump")
-0004 SEND_VAR CV0($v) 1
-0005 DO_ICALL
-0006 RETURN int(1)
+0000 ASSIGN CV0($v) string("%s")
+0001 INIT_FCALL 1 %d string("var_dump")
+0002 SEND_VAR CV0($v) 1
+0003 DO_ICALL
+0004 RETURN int(1)
 string(%d) "%s"