1&1 Extended Support for PHP at a glance

The PHP scripting language is the motor that drives many of the most dynamic websites and best web applications. WordPress, Joomla! and e-commerce platforms such as Magento or PrestaShop use PHP.

We are convinced that there is the perfect PHP version for every circumstance. As a 1&1 customer, you can assign the right PHP version to each of your domains. If you are using scripts or applications that are not compatible with the current PHP version, you can simply return to an earlier version in order to restore compatibility.


What happens if the PHP community has stopped providing security updates for this older PHP version but you still wish to or have to use this version?


In this scenario 1&1 Extended Support for PHP provides an alternative that allows you to continue operating your website and web applications securely with the older PHP version.

This is 1&1 Extended Support for PHP at a glance:


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4 thoughts on “1&1 Extended Support for PHP at a glance

  1. Chris Waugh says:

    I’m trying to email form data from a web page to my 1and1 email account but it is rejected for authentication reasons. Can I use Pear or PHPMailer with Windows Hosting to send the email with authentication?

    I have been trying to do this but it does not work.

    1. 1and1help says:

      Hi Chris,

      this might give you some helpful informations: https://www.lifewire.com/send-email-from-php-script-using-smtp-authentication-and-ssl-1171197

      Please keep in mind, that we are not supporting SMTP from a shared webspace officially (only Sendmail). But you might try it with smtp.1and1.com and an existing 1&1 mail address + SMTP auth.

      Michael, 1&1

  2. Don says:

    Hello! Can I upgrade to PHP 5.2 – 5.4 “and 5.3” ? Thanx

    1. 1and1help says:

      Hi Don,

      if you are not using PHP Extended Support for PHP 5.2 or 5.4 yet, our customer support can activate this with an additional monthly fee: https://contact.1and1.com.

      In the past we never offered PHP 5.3, so we can’t offer that.

      Best regards,
      Michael, 1&1

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