How to Troubleshoot WordPress Installations
WordPress often installs easily, but if you encounter problems, there are things you can do to troubleshoot the installation. These common WordPress installation problems are some that you might run into.
|Error Message||Common Cause||Solution|
|Error Connecting to the Database||The database name, username, password, or host was entered
|Revisit your MySQL database to obtain the database name,
username, password, and host and then reenter that
|Headers Already Sent Error Messages||A syntax error occurred in the wp-config.php file.||Open the wp-config.php file in a text
editor. The first line should contain only this line: <?php. The last line should contain only
this line: ?>. Make sure that those
lines contain nothing else — not even white space. Save the
|500: Internal Server Error||Permissions on PHP files are set incorrectly.||Try setting the permissions (chmod)
on the PHP files to 666. If that change doesn’t work, set them to
644. Each Web server has different settings for how it lets PHP
execute on its servers.
|404: Page Not Found||The URL for the login page is incorrect.||Double-check that the URL you’re using to get to the
login page is the same as the location of your WordPress
installation (such as http://yourdomain.com/wp-login.php).
|403: Forbidden Access||An index.html or index.htm file exists in the WordPress
|WordPress is a PHP application, so the default home page is
index.php. Look in the WordPress
installation folder on your Web server. If an index.html or index.htm file is in there, delete it.