Fixed bug #14049 (realpath() w/ZTS returns invalid results for non-existent

paths)

ext/standard/file.c

@@ -43,6 +43,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #ifdef PHP_WIN32
+#include <io.h>
 #define O_RDONLY _O_RDONLY
 #include "win32/param.h"
 #include "win32/winutil.h"
@@ -1939,6 +1940,15 @@ PHP_FUNCTION(realpath)
 	convert_to_string_ex(path);
 
 	if (VCWD_REALPATH(Z_STRVAL_PP(path), resolved_path_buff)) {
+#if ZTS
+# if PHP_WIN32
+		if (_access(resolved_path_buff, 0))
+			RETURN_FALSE;
+# else
+		if (access(resolved_path_buff, F_OK))
+			RETURN_FALSE;
+# endif
+#endif
 		RETURN_STRING(resolved_path_buff, 1);
 	} else {
 		RETURN_FALSE;