Export XML

/* Single Post Page */
<form>
    <input type="submit" name="exftp" value="Export FTP">
    <?php
        if(isset($GET['exftp'])){
            create_export(the_ID());
        }
    ?>
</form>

/* Custom Function */
<?php
function create_export($id) {
    $title = get_the_title($id);
    $current_host = get_field('client_website_current_ftp_host', $id);
    $current_user = get_field('client_website_current_ftp_username', $id);
    $current_password = get_field('client_website_current_ftp_password', $id);
    $current_password = base64_encode($current_password);
    $current_port = get_field('client_website_current_ftp_port', $id);

    $file = get_stylesheet_directory_uri().'/export/export.xml';
    // Write the contents to the file
    $content = '<?xml version="1.0" encoding="UTF-8"?>';
    $content .= '<FileZilla3 version="3.27.0.1" platform="mac">';
    $content .= '   <Servers>';
    $content .= '       <Server>';
    $content .= '           <Host>'.$current_host.'</Host>';
    $content .= '           <Port>'.$current_port.'</Port>';
    $content .= '           <Protocol>0</Protocol>';
    $content .= '           <Type>0</Type>';
    $content .= '           <User>'.$current_user.'</User>';
    $content .= '           <Pass encoding="base64">'.$current_password.'</Pass>';
    $content .= '           <Logontype>1</Logontype>';
    $content .= '           <TimezoneOffset>0</TimezoneOffset>';
    $content .= '           <PasvMode>MODE_DEFAULT</PasvMode>';
    $content .= '           <MaximumMultipleConnections>0</MaximumMultipleConnections>';
    $content .= '           <BypassProxy>0</BypassProxy>';
    $content .= '           <BypassProxy>0</BypassProxy>';
    $content .= '           <Name>'.$title.'</Name>';
    $content .= '           <Comments />';
    $content .= '           <Colour>0</Colour>';
    $content .= '           <LocalDir />';
    $content .= '           <RemoteDir />';
    $content .= '           <SyncBrowsing>0</SyncBrowsing>';
    $content .= '           <DirectoryComparison>0</DirectoryComparison>';
    $content .= '       </Server>';
    $content .= '   </Servers>';
    $content .= '</FileZilla3>';

    file_put_contents($file, $content);

}