Form to test file uploads.
function _file_test_form($form, &$form_state) {
$form['file_test_upload'] = array(
'#type' => 'file',
'#title' => t('Upload a file'),
);
$form['file_test_replace'] = array(
'#type' => 'select',
'#title' => t('Replace existing image'),
'#options' => array(
FILE_EXISTS_RENAME => t('Appends number until name is unique'),
FILE_EXISTS_REPLACE => t('Replace the existing file'),
FILE_EXISTS_ERROR => t('Fail with an error'),
),
'#default_value' => FILE_EXISTS_RENAME,
);
$form['file_subdir'] = array(
'#type' => 'textfield',
'#title' => t('Subdirectory for test file'),
'#default_value' => '',
);
$form['extensions'] = array(
'#type' => 'textfield',
'#title' => t('Allowed extensions.'),
'#default_value' => '',
);
$form['allow_all_extensions'] = array(
'#type' => 'checkbox',
'#title' => t('Allow all extensions?'),
'#default_value' => FALSE,
);
$form['is_image_file'] = array(
'#type' => 'checkbox',
'#title' => t('Is this an image file?'),
'#default_value' => TRUE,
);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Submit'),
);
return $form;
}