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Turning the error message display on in case of unexpected and persistent blank pages

If your back - office and/or front - office start displaying a blank or incomplete page regularly without any error message, it is necessary to activate the display of the PHP errors in order to understand the problem.

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Some people may encounter memory allocation issues, particularly when the back - office tries to display images which are quite big in the disk (over 800 Kb). You should know that even if you manually increase the hosting memory limit to 128 Mb, some web hosts, such as 1&1, will keep the limit at 32 Mb. See this FAQ from 1&1: http://faq.oneandone.co.uk/scripting/php/10.html.

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There are cases when PrestaShop will not recognize a user's e-mail or password, making it impossible to connect to either the back - office and the back-front office. The user is simply sent back to the login screen. Some reports tend to point that IE10 is the only browser where this happens.

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  1. Configure the SMTP server to send emails:
    1. Get information for SMTP connection from your hosting provider.
    2. Go to your back - office (either you or an administrator who can still log) "E-Mails" page, in the "Advanced parameters" menu.
    3. Select the "Use my own SMTP settings" option. A form will appear: fill it with the information given by your host.
    4. Save your changes.
    5. Request a new password once again. You should receive it.
  2. Follow these steps:
    1. Choose a new password. In our example, "$$$rabbit$159$$$".
    2. Using your FTP client, open the login.php file, located in your administration folder online (the name of which depends on your installation).
      At the bottom of the file, add the following line:
      echo md5( PSQL( _COOKIE_KEY_ . 'newpassword' ) );
      So with our example password:
      echo md5( PSQL( _COOKIE_KEY_ . '$$$rabbit$159$$$' ) );
      Remember to put your own new password!
  3. Go to the login screen to the back-office, as if you wanted to log in, and copy the text that appears at the bottom of the page (e.g.: a0ee884b507dd4624ce51968cfbb19a9).
  4. Go to the PrestaShop database, for example using phpMyAdmin. In the ps_employee table, replace the existing value in the passwd column for the employee of which you want to change the password with the value obtained in the previous step. Save your changes.
  5. You can now connect with the usual username and new password.

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