Intermittent "No Database Selected" in PHP/MySQL?

Posted by ANE on Stack Overflow See other posts from Stack Overflow or by ANE
Published on 2010-05-06T15:50:18Z Indexed on 2010/05/06 19:18 UTC
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Have a PHP/MySQL form with a dropdown box containing a list of 350 names. When any random name is selected, sometimes it works & displays info about that name from the database, and sometimes the form gives the error "No Database Selected".

Here's what I've tried, pretty much grasping at straws as I'm not a programmer:

  • Increasing max_connections in /etc/my.cnf from 200 to 2000 (even though only 4-5 connections are made and it's a lightly used server)
  • Changing mysql_pconnect to mysql_connect
  • Adding the word true to this connection string:

    $mysql = mysql_pconnect($hostname_mysql, $username_mysql, $password_mysql, true) or trigger_error(mysql_error(),E_USER_ERROR);

  • Changing the word require_once to require on this line:

    [?php require('/home/user/Connections/mysql.php'); ?]

  • Enabling MySQL & PHP query & error logging. (no errors logged)

Here is the code: [removed old bad code]

Update: Working answer from Rob Apodaca below.

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