A common problem is that WordPress is unable to access the filesystem directly, which results in a page indicating that “To perform the requested action, connection information is required.” learn how you can fix this

If you feel that your WordPress installation should not be asking you for this information, or you simply do not want WordPress to use this method of plugin management, you may be able to work around it.
What is Causing This?

Whenever you use the WordPress control panel to automatically install, upgrade, or delete plugins, WordPress must make changes to files on the filesystem.

Before making any changes, WordPress first checks to see whether or not it has access to directly manipulate the file system.

If WordPress does not have the necessary permissions to modify the filesystem directly, you will be asked for FTP credentials so that WordPress can try to do what it needs to via FTP.
Why Can’t WordPress Write To The Filesystem?

In order to understand why WordPress can’t write to the filesystem, we need to take a look at some WordPress internals.

The following code is from the get_filesystem_method() method in the wp-admin/includes/file.php file:

if( function_exists(‘getmyuid’) && function_exists(‘fileowner’) ){
$temp_file = wp_tempnam();
if ( getmyuid() == fileowner($temp_file) )
$method = ‘direct’;
unlink($temp_file);
}

This code creates a temporary file and confirms that the file just created is owned by the same user that owns the script currently being run. In the case of installing plugins, the script being run is wp-admin/plugin-install.php.

This may seem a little counter-intuitive, since the only thing WordPress really needs to be able to do is write to the wp-content/plugins directory.
What Can I Do About It?

In order to fix this issue, you will need to make sure that the scripts which need to write to the filesystem are owned by the same user that apache is running as.

Many hosting companies will run your apache instance using your user account, and all of your files will be owned by the same account. In those cases, you will probably not have the issue described here.

If your hosting company is running apache as a system user, and your files are owned by your own account, your only option may be to enter your FTP credentials here and allow WordPress to use FTP.

If you are running on a hosting company that gives you root access, or you have installed WordPress on your own development machine at home or at work, you should be able to modify the filesystem permissions to allow WordPress to directly access the filesystem.

The easiest way to do this is to find out what user apache is running as and change ownership of the entire WordPress directory to that user. For example, if apache is running as ‘httpd’, you could use the following commands on your WordPress installation directory:

# chown -R httpd: wordpress

Similar you also can us:

# chown -R apache: public_html/

Tip: In order to find out what user your instance of apache is running as, create a test script with the following content:
<?php echo(exec("whoami")); ?>

1. Deactivate all WordPress plugins
2. Upload this script to root of your WordPress path on your server via ftp and point your browser to http://www.yoursite.com/your-wordpress-path/remove-wlm-extra-pages.php
3. Remove Wishlist Member duplicate pages by clicking on “remove it” bottom
4. Delete the script from your server.
5. Activate wishlist member plugin.
6. Visit one of “Registration URL” at “WL Member » Manage Membership Levels” to generate wishlist member page.
7. Activate other plugins
8. Have fun

Example:

Download it here: remove-wlm-extra-pages.zip

Add new admin to wordpress without knowing orginal admin details

let make it simple you need free WordPress Emergency Add New Admin!

• Download free  addnewadmin.zip and extract it to a folder
• Upload addnewadmin.php to root of your wordpress instalation path using a ftp program such as filezilla
• Navigate your browser to Http://yoursite.com/your_wordpress_instalation_path/addnewadmin/
• You see a form that you can add new admin details. fill and submit and enjoy another new admin.
• When you done, make sure to remove the script/file from your server. so no one else can find it.

Features:

• Tested on WP3
• If new admin user exist it show its info and do not overwrite it
• Just one file.
• Nice and easy user interface like fresh WordPress installation
• It find right database  details such as prefix and connection info.
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Screenshot:

Download latest WordPress Emergency Add New Admin

Update:  Why use AddNewAdmin script instead of phpmyadmin?

1. phpmyadmin is  good if you know how to use it. but AddNewAdmin is more easy and faster and safe. There is no way to lose your database  info with AddNewAdmin.  It only add new admin if same admin is not exist.
2. You need access to phpmyadmin.  Most of the time you need control panel info in order to access to phpmyadmin.  You may have access to your site phpmyadmin via control panel.  But as freelancer you may don’t have it that time.  AddNewAdmin just need ftp info to upload.  AddNewAdmin is good to fix others websites at no time with less info.  Website owner  no need share phpmyadmin info or even cpanel info with you!
3. You can install phpmyadmin and setup it via ftp and use it,  but using addnewadmin take less time , AddNewAdmin no need setup.  Just copy one file and use it right away.  Instead of emailing the buyer and asking for the host or phpmyadmin info,   Create new admin instantly  and do the task and let him know job is done and get paid faster.
4. To create a admin using phpmyadmin you need to do it at least in few steps. finding right tables, creating a user . changing that user to admin. but   AddNewAdmin do all automatically just by one click. It find right wordpress database. It find right prefix.  It test existing user and add new admin where and when it should!
5. by using phpmyadmin  you have to do the task  in hard way. but AddNewAdmin is like drinking water! It give you feel like WordPress way.
6. AddNewAdmin is designed to be safe and fast to do what it say to do.  I personally used it on more than 50 sites  and counting!

have question? ask me via comment.