1 files changed, 28 insertions, 18 deletions

diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 136bd5a268..fe2b4be374 100644
--- a/ext/zlib/zlib.c
+++ b/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