Merge branch 'PHP-8.0'

* PHP-8.0:
  Fixed bug #80723

Author: nikic

Zend/zend_object_handlers.c

@@ -1608,6 +1608,11 @@ ZEND_API int zend_std_compare_objects(zval *o1, zval *o2) /* {{{ */
 }
 /* }}} */
 
+ZEND_API int zend_objects_not_comparable(zval *o1, zval *o2)
+{
+	return ZEND_UNCOMPARABLE;
+}
+
 ZEND_API int zend_std_has_property(zend_object *zobj, zend_string *name, int has_set_exists, void **cache_slot) /* {{{ */
 {
 	int result;

Zend/zend_object_handlers.h

@@ -225,6 +225,10 @@ ZEND_API int zend_std_compare_objects(zval *o1, zval *o2);
 ZEND_API int zend_std_get_closure(zend_object *obj, zend_class_entry **ce_ptr, zend_function **fptr_ptr, zend_object **obj_ptr, bool check_only);
 ZEND_API void rebuild_object_properties(zend_object *zobj);
 
+/* Handler for objects that cannot be meaningfully compared.
+ * Only objects with the same identity will be considered equal. */
+ZEND_API int zend_objects_not_comparable(zval *o1, zval *o2);
+
 ZEND_API int zend_check_protected(zend_class_entry *ce, zend_class_entry *scope);
 
 ZEND_API int zend_check_property_access(zend_object *zobj, zend_string *prop_info_name, bool is_dynamic);

ext/sockets/sockets.c

@@ -443,6 +443,7 @@ static PHP_MINIT_FUNCTION(sockets)
 	socket_object_handlers.get_constructor = socket_get_constructor;
 	socket_object_handlers.clone_obj = NULL;
 	socket_object_handlers.get_gc = socket_get_gc;
+	socket_object_handlers.compare = zend_objects_not_comparable;
 
 	address_info_ce = register_class_AddressInfo();
 	address_info_ce->create_object = address_info_create_object;

ext/sockets/tests/bug80723.phpt

@@ -0,0 +1,21 @@
+--TEST--
+Bug #80723: Different sockets compare as equal (regression in 8.0)
+--FILE--
+<?php
+$socket_1 = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
+$socket_2 = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
+var_dump($socket_1 == $socket_1);
+var_dump($socket_2 == $socket_2);
+var_dump($socket_1 == $socket_2);
+
+$vector = array(1 => $socket_1, 2 => $socket_2);
+var_dump(array_search($socket_1, $vector));
+var_dump(array_search($socket_2, $vector));
+
+?>
+--EXPECT--
+bool(true)
+bool(true)
+bool(false)
+int(1)
+int(2)