fix bug #60761 zlib.output_compression fails on refresh

ext/zlib/zlib.c

@@ -284,7 +284,8 @@ static void php_zlib_output_compression_start(TSRMLS_D)
 			ZLIBG(output_compression) = PHP_OUTPUT_HANDLER_DEFAULT_SIZE;
 			/* break omitted intentionally */
 		default:
-			if (	(h = php_zlib_output_handler_init(ZEND_STRL(PHP_ZLIB_OUTPUT_HANDLER_NAME), ZLIBG(output_compression), PHP_OUTPUT_HANDLER_STDFLAGS TSRMLS_CC)) &&
+			if (	php_zlib_output_encoding(TSRMLS_C) &&
+					(h = php_zlib_output_handler_init(ZEND_STRL(PHP_ZLIB_OUTPUT_HANDLER_NAME), ZLIBG(output_compression), PHP_OUTPUT_HANDLER_STDFLAGS TSRMLS_CC)) &&
 					(SUCCESS == php_output_handler_start(h TSRMLS_CC))) {
 				if (ZLIBG(output_handler) && *ZLIBG(output_handler)) {
 					MAKE_STD_ZVAL(zoh);
@@ -966,7 +967,6 @@ static PHP_RINIT_FUNCTION(zlib)
 
 static PHP_RSHUTDOWN_FUNCTION(zlib)
 {
-	ZLIBG(output_compression) = 0;
 	php_zlib_cleanup_ob_gzhandler_mess(TSRMLS_C);
 
     return SUCCESS;

main/output.c

@@ -1025,6 +1025,7 @@ static inline php_output_handler_status_t php_output_handler_op(php_output_handl
 		case PHP_OUTPUT_HANDLER_SUCCESS:
 			/* no more buffered data */
 			handler->buffer.used = 0;
+			handler->flags |= PHP_OUTPUT_HANDLER_PROCESSED;
 			break;
 	}
 

main/php_output.h

@@ -45,6 +45,7 @@
 /* handler status flags */
 #define PHP_OUTPUT_HANDLER_STARTED		0x1000
 #define PHP_OUTPUT_HANDLER_DISABLED		0x2000
+#define PHP_OUTPUT_HANDLER_PROCESSED	0x4000
 
 /* handler op return values */
 typedef enum _php_output_handler_status_t {
@@ -82,7 +83,7 @@ typedef enum _php_output_handler_hook_t {
 } php_output_handler_hook_t;
 
 #define PHP_OUTPUT_HANDLER_INITBUF_SIZE(s) \
-( (s) ? \
+( ((s) > 1) ? \
 	(s) + PHP_OUTPUT_HANDLER_ALIGNTO_SIZE - ((s) % (PHP_OUTPUT_HANDLER_ALIGNTO_SIZE)) : \
 	PHP_OUTPUT_HANDLER_DEFAULT_SIZE \
 )