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Also refer Common WordPress Errors for the most common WordPress errors experienced by WordPress users such as

• The White Screen
• Internal Server Error
• Error Establishing Database Connection
• Failed Auto-Upgrade
• Connection Timed Out
• Maintenance Mode Following Upgrade
• PHP errors or MySQL DB errors

How to deactivate all plugins when not able to access the administrative menus? #How to deactivate all plugins when not able to access the administrative menus?

Sometimes it may be necessary to deactivate all plugins, but you can’t access the Administration Screens to do so. One of two methods are available to deactivate all plugins.

Use phpMyAdmin to deactivate all plugins.

1. In the table wp_options, under the option_name column (field) find the active_plugins row
2. Change the option_value field to: a:0:{}

Or reset your plugins folder via FTP or the file manager provided in your host’s control panel. This method preserves plugin options but requires plugins be manually reactivated.

1. Via FTP or your host’s file manager, navigate to the wp-contents folder (directory)
2. Via FTP or your host’s file manager, rename the folder “plugins” to “plugins.hold”
3. Login to your WordPress administration plugins page (/wp-admin/plugins.php) – this will disable any plugin that is “missing”.
4. Via FTP or your host’s file manager, rename “plugins.hold” back to “plugins”

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How to clear the “Briefly unavailable for scheduled maintenance” message after doing automatic upgrade? #How to clear the “Briefly unavailable for scheduled maintenance” message after doing automatic upgrade?

As part of the automatic upgrade WordPress places a file named .maintenance in the blog base folder (folder that contains the wp-admin folder). If that file exists, then vistors will see the message Briefly unavailable for scheduled maintenance. Check back in a minute.

To stop that message from being displayed to vistors, just delete the .maintenance file. The automatic upgrade should be executed again, just in case it failed.

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An update was just released, so why does my blog not recognize the update is available? #An update was just released, so why does my blog not recognize the update is available?

When an update is released, notification of that release is displayed at the top administration screens saying WordPress x.x.x is available! Please update now. Not every blog will see that message at the same time. Your blog is programmed to check for updates every 12 hours, but the timing of that check is purely random. So if your blog just checked for updates minutes before an update was released, you won’t see the update message until your blog checks for updates 12 hours later.

If you want your blog to check right now for updates, you can delete the update_core option name record in your wp_options table. Note that plugins and themes each have their own check and update cycle, controlled by the records update_plugins and update_themes, in wp_options.

Relevant discussion thread:

• https://wordpress.org/support/topic/242485

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Why did I lose custom changes to the WordPress Default Theme during the last automatic upgrade? #Why did I lose custom changes to the WordPress Default Theme during the last automatic upgrade?

A core upgrade copies all the new files from the distribution over the old ones, so if you changed existing files in the WordPress default theme (e.g. wp-content/themes/twentysixteen/style.css), those changes got overwritten with the new version of that file.

Please note, a core upgrade goes through a list of “old files”, as defined in wp-admin/includes/update-core.php, and deletes those files. Any files not on the list, and not in the distribution, are preserved.

Remember, that before upgrades, whether automatic or manual, both the WordPress Files and database should be backed-up as explained in WordPress Backups.

A better way to modify the default theme is by using a child theme. It’s a little more work to set up, but worth the effort because your customizations will be safe when the main theme is updated.

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How do you repair a MySQL database table? #How do you repair a MySQL database table?

Every once in a while, it may be necessary to repair one or more MySQL database tables. According to the How to Repair MyISAM Tables at dev.mysql.com there are a number of reasons to repair a table including errors such as “tbl_name.frm is locked against change”, “Can’t find file tbl_name.MYI (Errcode: nnn)”, “Unexpected end of file”, “Record file is crashed”, or “Got error nnn from table handler”.

Here are the steps to repair a table in a MySQL database using phpMyAdmin:

1. Login to hosting account.
2. Login to phpMyAdmin.
3. Choose the affected database. If you only have one database, it should choose it by default so you don’t need to do anything.
4. In the main panel, you should see a list of your database tables. Check the boxes by the tables that need repair.
5. At the bottom of the window just below the list of tables, there is a drop down menu. Choose “Repair Table”

Remember, that it is advisable to have a current backup of your database at all times. See also WordPress Backups

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How do I empty a database table? #How do I empty a database table?

Refer Emptying a Database Table

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Emailed passwords are not being received #Emailed passwords are not being received

Description: When users try to register with your blog or change their passwords by entering their username and/or email, WordPress indicates that their password has been emailed to them, but it is never received.

Reason and Solutions: WordPress uses the standard PHP mail() function, which uses sendmail. No account information is needed. This is not generally a problem if you are using a hosting service, but if you are using your own box and do not have an SMTP server, the mail will never send. If you are using a *NIX box, you should have either postfix or sendmail on your machine; you will just need to set them up (search the Internet for how-to’s). If you do not want to go through setting up a complete mail server on your *NIX box you may find msmtp useful — it provides “A secure, effective and simple way of