Вадим

$mail = file_get_contents('mail.tpl');
$mail = str_replace('{name}', 'value', $mail);
$mail = str_replace('{key}', 'value', $mail);
$mail = str_replace('{phone}', 'value', $mail);

https://192.168.1.1:1500/ispmgr?authinfo=login:pass&out=json&func=auth&lang=ru

https://192.168.1.1:1500/ispmgr?auth=Номер_сессии&out=json

Content-type: application/x-www-form-urlencoded
Cookie: ispmgrses5=Номер_сессии;
ISP-Client: Web-interface
Referer: https://192.168.1.1:1500/ispmgr

[sok] => ok
[func] => file.edit
[elid] => file.php
[plid] => www
[full_filepath] => www/file.php
[encoding] => UTF-8
[fdata] => FILE CONTENT

$html = file_get_html('http://simplehtmldom.sourceforge.net/', false, null, -1, -1, true, true, DEFAULT_TARGET_CHARSET, false);

function write_file($file, $content = '')
 {
    $is_writable = TRUE;

    $dir = explode('/', $file);

    if (strpos(end($dir), '.') !== FALSE && isset($dir[count($dir)-1])) {
        unset($dir[count($dir)-1]);
    }

    if (count($dir)) {
        @mkdir(implode('/', $dir), 0777, TRUE);
    }

    if (file_exists($file) && !is_writable($file))
    {
        $is_writable = FALSE;
    }
    
    if ($is_writable && file_put_contents($file, $content))
    {
        return TRUE;
    }
    
    show_error ('Ошибка: Не удается создать файл "'.$file.'".');
    
    return FALSE;
 }