how to use {$upload} in a addon_ module

[mohammad50]

hi there

i want to use whmcs attachment that used in support ticket in a addon module

this is my code in .tpl file

 

{if $upload}

<tr>

<td style="width: 150px" valign="top"><label>{$LANG.supportticketsticketattachments}</label></td>

<td>

<input type="file" name="attachments[]" dir="ltr" size="15" />

<br/>

({$LANG.supportticketsallowedextensions}: {$allowedfiletypes} .zip - .jpg - .gif - .png )

</td>

</tr>

{/if}

 

i dont know how can i use this in my php file when form submited