diff --git a/Zend/Optimizer/zend_optimizer.c b/Zend/Optimizer/zend_optimizer.c
index d10b4d83fc3e..4ce4a2ba2731 100644
--- a/Zend/Optimizer/zend_optimizer.c
+++ b/Zend/Optimizer/zend_optimizer.c
@@ -29,6 +29,7 @@
 #include "zend_inference.h"
 #include "zend_dump.h"
 #include "php.h"
+#include "SAPI.h"
 
 #ifndef ZEND_OPTIMIZER_MAX_REGISTERED_PASSES
 # define ZEND_OPTIMIZER_MAX_REGISTERED_PASSES 32
@@ -786,6 +787,9 @@ static bool zend_optimizer_ignore_class(zval *ce_zv, const zend_string *filename
 			return false;
 		}
 	}
+	if (sapi_is_single_request()) {
+		return false;
+	}
 	return ce->type == ZEND_USER_CLASS
 		&& (!ce->info.user.filename || ce->info.user.filename != filename);
 }
@@ -807,6 +811,9 @@ static bool zend_optimizer_ignore_function(zval *fbc_zv, const zend_string *file
 				return false;
 			}
 		}
+		if (sapi_is_single_request()) {
+			return false;
+		}
 		return !fbc->op_array.filename || fbc->op_array.filename != filename;
 	} else {
 		ZEND_ASSERT(fbc->type == ZEND_EVAL_CODE);
@@ -899,6 +906,10 @@ const zend_class_constant *zend_fetch_class_const_info(
 	*is_prototype = is_static_reference
 		&& !(const_info->ce->ce_flags & ZEND_ACC_FINAL) && !(ZEND_CLASS_CONST_FLAGS(const_info) & ZEND_ACC_FINAL);
 
+	if (Z_TYPE(const_info->value) > IS_ARRAY) {
+		return NULL;
+	}
+
 	return const_info;
 }
 
diff --git a/main/SAPI.c b/main/SAPI.c
index 62e1c89e4bb9..c7e2f269d7bf 100644
--- a/main/SAPI.c
+++ b/main/SAPI.c
@@ -1173,3 +1173,11 @@ SAPI_API void sapi_add_request_header(const char *var, unsigned int var_len, cha
 	}
 }
 /* }}} */
+
+SAPI_API bool sapi_is_single_request(void)
+{
+	if (!sapi_module.is_single_request) {
+		return false;
+	}
+	return sapi_module.is_single_request();
+}
diff --git a/main/SAPI.h b/main/SAPI.h
index e62f686603c4..980802291715 100644
--- a/main/SAPI.h
+++ b/main/SAPI.h
@@ -167,6 +167,7 @@ SAPI_API void sapi_deactivate_destroy(void);
 SAPI_API void sapi_deactivate(void);
 SAPI_API void sapi_initialize_empty_request(void);
 SAPI_API void sapi_add_request_header(const char *var, unsigned int var_len, char *val, unsigned int val_len, void *arg);
+SAPI_API bool sapi_is_single_request(void);
 END_EXTERN_C()
 
 /*
@@ -290,6 +291,8 @@ struct _sapi_module_struct {
 	unsigned int (*input_filter_init)(void);
 
 	int (*pre_request_init)(void); /* called before activate and before the post data read - used for .user.ini */
+
+	bool (*is_single_request)(void); /* Whether the SAPI will only handle a single request. This implies all script structures are immutable. */
 };
 
 struct _sapi_post_entry {
@@ -341,6 +344,7 @@ END_EXTERN_C()
 	NULL, /* ini_entries;            */ \
 	NULL, /* additional_functions    */ \
 	NULL, /* input_filter_init       */ \
-	NULL  /* pre_request_init        */
+	NULL, /* pre_request_init        */ \
+	NULL  /* is_single_request       */
 
 #endif /* SAPI_H */
diff --git a/sapi/cli/php_cli.c b/sapi/cli/php_cli.c
index 9a05f8e68547..78ae7e458811 100644
--- a/sapi/cli/php_cli.c
+++ b/sapi/cli/php_cli.c
@@ -1189,6 +1189,11 @@ static int do_cli(int argc, char **argv) /* {{{ */
 }
 /* }}} */
 
+static bool is_single_request(void)
+{
+	return true;
+}
+
 /* {{{ main */
 #ifdef PHP_CLI_WIN32_NO_CONSOLE
 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
@@ -1320,6 +1325,13 @@ int main(int argc, char *argv[])
 	sapi_module_ptr->php_ini_path_override = ini_path_override;
 	sapi_module_ptr->phpinfo_as_text = 1;
 	sapi_module_ptr->php_ini_ignore_cwd = 1;
+#ifndef PHP_CLI_WIN32_NO_CONSOLE
+	if (sapi_module_ptr != &cli_server_sapi_module) {
+		sapi_module_ptr->is_single_request = is_single_request;
+	}
+#else
+	sapi_module_ptr->is_single_request = is_single_request;
+#endif
 	sapi_startup(sapi_module_ptr);
 	sapi_started = 1;