Fixed bug #21228 (broken check for ob_gzhandler).

Fixed a bug that made ob_start return incorrect return value.

ext/zlib/php_zlib.h

@@ -54,6 +54,7 @@ PHP_FUNCTION(gzencode);
 PHP_FUNCTION(ob_gzhandler);
 
 int php_enable_output_compression(int buffer_size TSRMLS_DC);
+int php_ob_gzhandler_check(TSRMLS_DC);
 
 php_stream *php_stream_gzopen(php_stream_wrapper *wrapper, char *path, char *mode, int options, char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC);
 extern php_stream_ops php_stream_gzio_ops;

ext/zlib/zlib.c

@@ -890,6 +890,34 @@ PHP_FUNCTION(gzencode)
 }
 /* }}} */
 
+/* {{{ php_ob_gzhandler_check
+ */
+int php_ob_gzhandler_check(TSRMLS_DC)
+{
+	/* check for wrong usages */
+	if (OG(ob_nesting_level>0)) {
+		if (php_ob_handler_used("ob_gzhandler" TSRMLS_CC)) {
+			php_error_docref("ref.outcontrol" TSRMLS_CC, E_WARNING, "output handler 'ob_gzhandler' cannot be used twice");
+			return FAILURE;
+		}
+		if (php_ob_handler_used("mb_output_handler" TSRMLS_CC)) {
+			php_error_docref("ref.outcontrol" TSRMLS_CC, E_WARNING, "output handler 'ob_gzhandler' cannot be used after 'mb_output_handler'");
+			return FAILURE;
+		}
+		if (php_ob_handler_used("URL-Rewriter" TSRMLS_CC)) {
+			php_error_docref("ref.outcontrol" TSRMLS_CC, E_WARNING, "output handler 'ob_gzhandler' cannot be used after 'URL-Rewriter'");
+			return FAILURE;
+		}
+		if (php_ob_init_conflict("ob_gzhandler", "zlib output compression" TSRMLS_CC)) {
+			return FAILURE;
+		}
+	}
+
+	return SUCCESS;
+}
+
+/* }}} */
+
 /* {{{ proto string ob_gzhandler(string str, int mode)
    Encode str based on accept-encoding setting - designed to be called from ob_start() */
 PHP_FUNCTION(ob_gzhandler)
@@ -904,24 +932,6 @@ PHP_FUNCTION(ob_gzhandler)
 		ZEND_WRONG_PARAM_COUNT();
 	}
 
-	/* check for wrong usages */
-	if (OG(ob_nesting_level>1)) {
-		if (php_ob_handler_used("ob_gzhandler" TSRMLS_CC)) {
-			php_error_docref("ref.outcontrol" TSRMLS_CC, E_WARNING, "output handler 'ob_gzhandler' cannot be used twice");
-			RETURN_FALSE;
-		}
-		if (php_ob_handler_used("mb_output_handler" TSRMLS_CC)) {
-			php_error_docref("ref.outcontrol" TSRMLS_CC, E_WARNING, "output handler 'ob_gzhandler' cannot be used after 'mb_output_handler'");
-			RETURN_FALSE;
-		}
-		if (php_ob_handler_used("URL-Rewriter" TSRMLS_CC)) {
-			php_error_docref("ref.outcontrol" TSRMLS_CC, E_WARNING, "output handler 'ob_gzhandler' cannot be used after 'URL-Rewriter'");
-			RETURN_FALSE;
-		}
-		if (php_ob_init_conflict("ob_gzhandler", "zlib output compression" TSRMLS_CC))
-			RETURN_FALSE;
-	}
-
 	if (ZLIBG(ob_gzhandler_status)==-1
 		|| zend_hash_find(&EG(symbol_table), "HTTP_SERVER_VARS", sizeof("HTTP_SERVER_VARS"), (void **) &data)==FAILURE
 		|| Z_TYPE_PP(data)!=IS_ARRAY

main/output.c

@@ -24,6 +24,9 @@
 #include "ext/standard/head.h"
 #include "ext/standard/basic_functions.h"
 #include "ext/standard/url_scanner_ex.h"
+#ifdef HAVE_ZLIB
+#include "ext/zlib/php_zlib.h"
+#endif
 #include "SAPI.h"
 
 #define OB_DEFAULT_HANDLER_NAME "default output handler"
@@ -405,6 +408,11 @@ PHPAPI int php_ob_init_conflict(char *handler_new, char *handler_set TSRMLS_DC)
 static int php_ob_init_named(uint initial_size, uint block_size, char *handler_name, zval *output_handler, uint chunk_size, zend_bool erase TSRMLS_DC)
 {
 	if (OG(ob_nesting_level)>0) {
+#ifdef HAVE_ZLIB
+		if (!strncmp(handler_name, "ob_gzhandler", sizeof("ob_gzhandler")) && php_ob_gzhandler_check(TSRMLS_CC)) {
+			return FAILURE;
+		}
+#endif
 		if (OG(ob_nesting_level)==1) { /* initialize stack */
 			zend_stack_init(&OG(ob_buffers));
 		}
@@ -445,22 +453,20 @@ static zval* php_ob_handler_from_string(const char *handler_name TSRMLS_DC)
  */
 static int php_ob_init(uint initial_size, uint block_size, zval *output_handler, uint chunk_size, zend_bool erase TSRMLS_DC)
 {
-	int res, result, len;
+	int result, len;
 	char *handler_name, *next_handler_name;
 	HashPosition pos;
 	zval **tmp;
 	zval *handler_zval;
 
 	if (output_handler && output_handler->type == IS_STRING) {
-		result = 0;
 		handler_name = Z_STRVAL_P(output_handler);
 		while ((next_handler_name=strchr(handler_name, ',')) != NULL) {
 			len = next_handler_name-handler_name;
 			next_handler_name = estrndup(handler_name, len);
 			handler_zval = php_ob_handler_from_string(next_handler_name TSRMLS_CC);
-			res = php_ob_init_named(initial_size, block_size, next_handler_name, handler_zval, chunk_size, erase TSRMLS_CC);
+			result = php_ob_init_named(initial_size, block_size, next_handler_name, handler_zval, chunk_size, erase TSRMLS_CC);
-			result &= res;
+			if (result != SUCCESS) {
-			if (!res==SUCCESS) {
 				zval_dtor(handler_zval);
 				FREE_ZVAL(handler_zval);
 			}
@@ -468,15 +474,12 @@ static int php_ob_init(uint initial_size, uint block_size, zval *output_handler,
 			efree(next_handler_name);
 		}
 		handler_zval = php_ob_handler_from_string(handler_name TSRMLS_CC);
-		res = php_ob_init_named(initial_size, block_size, handler_name, handler_zval, chunk_size, erase TSRMLS_CC);
+		result = php_ob_init_named(initial_size, block_size, handler_name, handler_zval, chunk_size, erase TSRMLS_CC);
-		result &= res;
+		if (result != SUCCESS) {
-		if (!res==SUCCESS) {
 			zval_dtor(handler_zval);
 			FREE_ZVAL(handler_zval);
 		}
-		result = result ? SUCCESS : FAILURE;
 	} else if (output_handler && output_handler->type == IS_ARRAY) {
-		result = 0;
 		/* do we have array(object,method) */
 		if (zend_is_callable(output_handler, 1, &handler_name)) {
 			SEPARATE_ZVAL(&output_handler);
@@ -487,11 +490,10 @@ static int php_ob_init(uint initial_size, uint block_size, zval *output_handler,
 			/* init all array elements recursively */
 			zend_hash_internal_pointer_reset_ex(Z_ARRVAL_P(output_handler), &pos);
 			while (zend_hash_get_current_data_ex(Z_ARRVAL_P(output_handler), (void **)&tmp, &pos) == SUCCESS) {
-				result &= php_ob_init(initial_size, block_size, *tmp, chunk_size, erase TSRMLS_CC);
+				result = php_ob_init(initial_size, block_size, *tmp, chunk_size, erase TSRMLS_CC);
 				zend_hash_move_forward_ex(Z_ARRVAL_P(output_handler), &pos);
 			}
 		}
-		result = result ? SUCCESS : FAILURE;
 	} else if (output_handler && output_handler->type == IS_OBJECT) {
 		php_error_docref(NULL TSRMLS_CC, E_ERROR, "No method name given: use ob_start(array($object,'method')) to specify instance $object and the name of a method of class %s to use as output handler", Z_OBJCE_P(output_handler)->name);
 		result = FAILURE;