Error:Your requirements could not be resolved to an installable set of packages.(on server) : <p>I am using laravel 5.3 for my project.Now I am setting it up to the server.</p>

<p>The problem occured when doing so.And i am stuck at this point of error.</p>

<p>WHEN I run </p>

<blockquote>
  <p>composer install --no-dev</p>
</blockquote>

<p>command following error occurs:</p>

<pre><code> Problem 1
    - Installation request for fgrosse/phpasn1 1.5.2 -&gt; satisfiable by fgrosse/phpasn1[1.5.2].
    - fgrosse/phpasn1 1.5.2 requires ext-gmp * -&gt; the requested PHP extension gmp is missing from your system.
  Problem 2
    - Installation request for mdanter/ecc v0.4.2 -&gt; satisfiable by mdanter/ecc[v0.4.2].
    - mdanter/ecc v0.4.2 requires ext-gmp * -&gt; the requested PHP extension gmp is missing from your system.
  Problem 3
    - Installation request for pusher/pusher-php-server 2.6.3 -&gt; satisfiable by pusher/pusher-php-server[2.6.3].
    - pusher/pusher-php-server 2.6.3 requires ext-curl * -&gt; the requested PHP extension curl is missing from your system.
  Problem 4
    - pusher/pusher-php-server 2.6.3 requires ext-curl * -&gt; the requested PHP extension curl is missing from your system.
    - laravel-notification-channels/pusher-push-notifications 1.0.2 requires pusher/pusher-php-server 2.6.* -&gt; satisfiable by pusher/pusher-php-server[2.6.3].
    - Installation request for laravel-notification-channels/pusher-push-notifications 1.0.2 -&gt; satisfiable by laravel-notification-channels/pusher-push-notifications[1.0.2].

  To enable extensions, verify that they are enabled in your .ini files:
    - /etc/php/7.0/cli/php.ini
    - /etc/php/7.0/cli/conf.d/10-mysqlnd.ini
    - /etc/php/7.0/cli/conf.d/10-opcache.ini
    - /etc/php/7.0/cli/conf.d/10-pdo.ini
    - /etc/php/7.0/cli/conf.d/20-calendar.ini
    - /etc/php/7.0/cli/conf.d/20-ctype.ini
    - /etc/php/7.0/cli/conf.d/20-exif.ini
    - /etc/php/7.0/cli/conf.d/20-fileinfo.ini
    - /etc/php/7.0/cli/conf.d/20-ftp.ini
    - /etc/php/7.0/cli/conf.d/20-gettext.ini
    - /etc/php/7.0/cli/conf.d/20-iconv.ini
    - /etc/php/7.0/cli/conf.d/20-json.ini
    - /etc/php/7.0/cli/conf.d/20-mbstring.ini
    - /etc/php/7.0/cli/conf.d/20-mysqli.ini
    - /etc/php/7.0/cli/conf.d/20-pdo_mysql.ini
    - /etc/php/7.0/cli/conf.d/20-phar.ini
    - /etc/php/7.0/cli/conf.d/20-posix.ini
    - /etc/php/7.0/cli/conf.d/20-readline.ini
    - /etc/php/7.0/cli/conf.d/20-shmop.ini
    - /etc/php/7.0/cli/conf.d/20-sockets.ini
    - /etc/php/7.0/cli/conf.d/20-sysvmsg.ini
    - /etc/php/7.0/cli/conf.d/20-sysvsem.ini
    - /etc/php/7.0/cli/conf.d/20-sysvshm.ini
    - /etc/php/7.0/cli/conf.d/20-tokenizer.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
</code></pre>

<p>`</p>
