Merge mainstream 'master' branch into refactoring

During merge I had to revert:
	Nikita's patch for php_splice() (it probably needs to be applyed again)
	Bob Weinand's patches related to constant expression handling (we need to review them carefully)
	I also reverted all our attempts to support sapi/phpdbg (we didn't test it anyway)

Conflicts:
	Zend/zend.h
	Zend/zend_API.c
	Zend/zend_ast.c
	Zend/zend_compile.c
	Zend/zend_compile.h
	Zend/zend_constants.c
	Zend/zend_exceptions.c
	Zend/zend_execute.c
	Zend/zend_execute.h
	Zend/zend_execute_API.c
	Zend/zend_hash.c
	Zend/zend_highlight.c
	Zend/zend_language_parser.y
	Zend/zend_language_scanner.c
	Zend/zend_language_scanner_defs.h
	Zend/zend_variables.c
	Zend/zend_vm_def.h
	Zend/zend_vm_execute.h
	ext/date/php_date.c
	ext/dom/documenttype.c
	ext/hash/hash.c
	ext/iconv/iconv.c
	ext/mbstring/tests/zend_multibyte-10.phpt
	ext/mbstring/tests/zend_multibyte-11.phpt
	ext/mbstring/tests/zend_multibyte-12.phpt
	ext/mysql/php_mysql.c
	ext/mysqli/mysqli.c
	ext/mysqlnd/mysqlnd_reverse_api.c
	ext/mysqlnd/php_mysqlnd.c
	ext/opcache/ZendAccelerator.c
	ext/opcache/zend_accelerator_util_funcs.c
	ext/opcache/zend_persist.c
	ext/opcache/zend_persist_calc.c
	ext/pcre/php_pcre.c
	ext/pdo/pdo_dbh.c
	ext/pdo/pdo_stmt.c
	ext/pdo_pgsql/pgsql_driver.c
	ext/pgsql/pgsql.c
	ext/reflection/php_reflection.c
	ext/session/session.c
	ext/spl/spl_array.c
	ext/spl/spl_observer.c
	ext/standard/array.c
	ext/standard/basic_functions.c
	ext/standard/html.c
	ext/standard/mail.c
	ext/standard/php_array.h
	ext/standard/proc_open.c
	ext/standard/streamsfuncs.c
	ext/standard/user_filters.c
	ext/standard/var_unserializer.c
	ext/standard/var_unserializer.re
	main/php_variables.c
	sapi/phpdbg/phpdbg.c
	sapi/phpdbg/phpdbg_bp.c
	sapi/phpdbg/phpdbg_frame.c
	sapi/phpdbg/phpdbg_help.c
	sapi/phpdbg/phpdbg_list.c
	sapi/phpdbg/phpdbg_print.c
	sapi/phpdbg/phpdbg_prompt.c

3 files changed, 32 insertions, 10 deletions

diff --git a/ext/json/json.c b/ext/json/json.c
index d939a7deab..71f8cc2d69 100644
--- a/ext/json/json.c
+++ b/ext/json/json.c
@@ -39,7 +39,7 @@ static PHP_FUNCTION(json_last_error_msg);
 
 static const char digits[] = "0123456789abcdef";
 
-zend_class_entry *php_json_serializable_ce;
+PHP_JSON_API zend_class_entry *php_json_serializable_ce;
 
 ZEND_DECLARE_MODULE_GLOBALS(json)
 
@@ -230,7 +230,7 @@ static inline void json_pretty_print_indent(smart_str *buf, int options TSRMLS_D
 
 static void json_encode_array(smart_str *buf, zval **val, int options TSRMLS_DC) /* {{{ */
 {
-	int i, r;
+	int i, r, need_comma = 0;
 	HashTable *myht;
 
 	if (Z_TYPE_PP(val) == IS_ARRAY) {
@@ -253,7 +253,6 @@ static void json_encode_array(smart_str *buf, zval **val, int options TSRMLS_DC)
 		smart_str_appendc(buf, '{');
 	}
 
-	json_pretty_print_char(buf, options, '\n' TSRMLS_CC);
 	++JSON_G(encoder_depth);
 
 	i = myht ? zend_hash_num_elements(myht) : 0;
@@ -266,7 +265,6 @@ static void json_encode_array(smart_str *buf, zval **val, int options TSRMLS_DC)
 		uint key_len;
 		HashPosition pos;
 		HashTable *tmp_ht;
-		int need_comma = 0;
 
 		zend_hash_internal_pointer_reset_ex(myht, &pos);
 		for (;; zend_hash_move_forward_ex(myht, &pos)) {
@@ -283,11 +281,11 @@ static void json_encode_array(smart_str *buf, zval **val, int options TSRMLS_DC)
 				if (r == PHP_JSON_OUTPUT_ARRAY) {
 					if (need_comma) {
 						smart_str_appendc(buf, ',');
-						json_pretty_print_char(buf, options, '\n' TSRMLS_CC);
 					} else {
 						need_comma = 1;
 					}
 
+					json_pretty_print_char(buf, options, '\n' TSRMLS_CC);
 					json_pretty_print_indent(buf, options TSRMLS_CC);
 					php_json_encode(buf, *data, options TSRMLS_CC);
 				} else if (r == PHP_JSON_OUTPUT_OBJECT) {
@@ -302,11 +300,11 @@ static void json_encode_array(smart_str *buf, zval **val, int options TSRMLS_DC)
 
 						if (need_comma) {
 							smart_str_appendc(buf, ',');
-							json_pretty_print_char(buf, options, '\n' TSRMLS_CC);
 						} else {
 							need_comma = 1;
 						}
 
+						json_pretty_print_char(buf, options, '\n' TSRMLS_CC);
 						json_pretty_print_indent(buf, options TSRMLS_CC);
 
 						json_escape_string(buf, key, key_len - 1, options & ~PHP_JSON_NUMERIC_CHECK TSRMLS_CC);
@@ -318,11 +316,11 @@ static void json_encode_array(smart_str *buf, zval **val, int options TSRMLS_DC)
 					} else {
 						if (need_comma) {
 							smart_str_appendc(buf, ',');
-							json_pretty_print_char(buf, options, '\n' TSRMLS_CC);
 						} else {
 							need_comma = 1;
 						}
 
+						json_pretty_print_char(buf, options, '\n' TSRMLS_CC);
 						json_pretty_print_indent(buf, options TSRMLS_CC);
 
 						smart_str_appendc(buf, '"');
@@ -347,8 +345,12 @@ static void json_encode_array(smart_str *buf, zval **val, int options TSRMLS_DC)
 		JSON_G(error_code) = PHP_JSON_ERROR_DEPTH;
 	}
 	--JSON_G(encoder_depth);
-	json_pretty_print_char(buf, options, '\n' TSRMLS_CC);
-	json_pretty_print_indent(buf, options TSRMLS_CC);
+
+	/* Only keep closing bracket on same line for empty arrays/objects */
+	if (need_comma) {
+		json_pretty_print_char(buf, options, '\n' TSRMLS_CC);
+		json_pretty_print_indent(buf, options TSRMLS_CC);
+	}
 
 	if (r == PHP_JSON_OUTPUT_ARRAY) {
 		smart_str_appendc(buf, ']');
diff --git a/ext/json/php_json.h b/ext/json/php_json.h
index 637c5eae5e..e00de6a27b 100644
--- a/ext/json/php_json.h
+++ b/ext/json/php_json.h
@@ -51,7 +51,7 @@ ZEND_END_MODULE_GLOBALS(json)
 
 PHP_JSON_API void php_json_encode(smart_str *buf, zval *val, int options TSRMLS_DC);
 PHP_JSON_API void php_json_decode_ex(zval *return_value, char *str, int str_len, int options, long depth TSRMLS_DC);
-extern zend_class_entry *php_json_serializable_ce;
+extern PHP_JSON_API zend_class_entry *php_json_serializable_ce;
 
 
 /* json_encode() options */
diff --git a/ext/json/tests/bug66021.phpt b/ext/json/tests/bug66021.phpt
new file mode 100644
index 0000000000..cf52e0c6df
--- /dev/null
+++ b/ext/json/tests/bug66021.phpt
@@ -0,0 +1,20 @@
+--TEST--
+Bug #66021 (Blank line inside empty array/object when JSON_PRETTY_PRINT is set)
+--SKIPIF--
+<?php if (!extension_loaded("json")) print "skip"; ?>
+--FILE--
+<?php
+
+class Foo {
+	private $bar = 'baz';
+}
+
+echo json_encode([[], (object)[], new Foo], JSON_PRETTY_PRINT), "\n";
+
+?>
+--EXPECT--
+[
+    [],
+    {},
+    {}
+]