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I'm running a simple LAMP server at home from which I host a personal blog. The server is running Arch Linux, with the latest-and-greatest versions of Apache, MySQL, and PHP. In order to easily maintain the databases, I installed phpMyAdmin. However, I cannot login. If I were to SSH into the server and run mysql -u <user> -p <password>, no errors show up and I'm immediately placed into the MySQL prompt. No problem.

However, when I try to log in with phpMyAdmin, using those exact same credentials, nothing happens. No errors, no nothing, I'm just redirected back to the login page.

Did I do something wrong?

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As per the FAQs, Server Fault usually frowns upon questions in a home setting - the question would be better suited to SuperUser. That said, as a starting point check your php.ini settings for session.save_path (e.g. using phpinfo()) and ensure that path is writeable by the user PHP is running as (and check your server logs for errors). –  cyberx86 Mar 14 '12 at 2:29
    
Duly noted. Thanks for the help. –  Zach Dziura Mar 14 '12 at 4:50

3 Answers 3

Got the same symptom with phpMyAdmin on a CentOS server. (Kept trying to log in but kept getting redirected to the login screen, without any error nor warning.) It turned out the webspace was simply out of space. Making some room fixed it.

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Maybe you did the wrong configuration information. Let 's try to delete file config.inc.php and try again. In this case, it will ask you login as default configuration.

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Installing the mcrypt php module solved the issue for me (apt-get install php5-mcrypt).

How I found the issue:

  1. Set $cfg['Error_Handler']['display'] = true; in config.inc.php
  2. Set authentication mode from cookie to http
  3. Log in and see the error message that mcrypt is missing.
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