WordPress powers over 40% of websites worldwide. That's millions of sites relying on this platform every day. But even the most reliable systems occasionally throw up errors that can make your heart skip a beat.
Don't panic. Most WordPress errors look scarier than they actually are. In this guide, you'll learn how to diagnose and fix the most common WordPress problems yourself. We'll cover everything from the dreaded white screen to database connection errors.
Before You Start: Essential Safety Steps
Never attempt fixes on a live website without backing up first. One wrong move could make things worse.
Create a backup immediately:
- Use your hosting provider's backup tool (most offer one-click backups)
- Download your files via FTP if needed
- Export your database through phpMyAdmin
If you're on our WordPress hosting service, backups happen automatically. But it's still worth creating a fresh one before troubleshooting.
Enable WordPress debug mode to see detailed error messages:
- Open your site's
wp-config.phpfile - Find the line that says
define('WP_DEBUG', false); - Change it to
define('WP_DEBUG', true); - Add this line below it:
define('WP_DEBUG_LOG', true);
This reveals the actual error messages instead of generic failures.
The White Screen of Death
The white screen is WordPress's most notorious error. Your site loads completely blank - no content, no error message, nothing.
What causes it:
- Memory limit exceeded
- Plugin conflicts
- Theme issues
- PHP errors
How to fix it:
Step 1: Increase Memory Limit
Add this line to your wp-config.php file:
ini_set('memory_limit', '256M');Step 2: Deactivate All Plugins
- Access your site via FTP
- Navigate to
/wp-content/plugins/ - Rename the plugins folder to
plugins-off - Check if your site loads
If it works, rename the folder back and reactivate plugins one by one to identify the culprit.
Step 3: Switch to Default Theme
- Go to
/wp-content/themes/ - Rename your active theme folder
- WordPress will automatically switch to a default theme
If this fixes the issue, there's a problem with your theme files.
500 Internal Server Error
This generic error message means something went wrong, but the server can't specify what. Frustrating, but fixable.
Common causes:
- Corrupt .htaccess file
- Plugin conflicts
- File permission issues
- PHP memory limits
Step-by-step fix:
Step 1: Check .htaccess File
- Find the
.htaccessfile in your site's root directory - Rename it to
.htaccess-backup - Try loading your site
If it works, the .htaccess file was corrupted. Go to Settings → Permalinks in WordPress admin and click "Save Changes" to regenerate it.
Step 2: Check File Permissions
Incorrect permissions can trigger 500 errors:
- Folders should be 755 or 750
- Files should be 644 or 640
- Never set anything to 777 (major security risk)
Step 3: Increase PHP Memory
Add this to your .htaccess file:
php_value memory_limit 256MDatabase Connection Error
"Error establishing a database connection" means WordPress can't communicate with your database.
Quick fixes:
Step 1: Check Database Credentials
Open wp-config.php and verify these details are correct:
- DB_NAME
- DB_USER
- DB_PASSWORD
- DB_HOST
Contact your hosting provider if you're unsure about these values.
Step 2: Test Database Connection
Create a new file called test-db.php in your root directory:
<?php
$connection = mysql_connect('DB_HOST', 'DB_USER', 'DB_PASSWORD');
if (!$connection) {
die('Connection failed: ' . mysql_error());
}
echo 'Connected successfully';
?>Replace the values with your actual database details. If this fails, contact your hosting provider.
WordPress Admin Issues
Can't access your WordPress admin area? Here's how to regain control.
Reset Admin Password via Database
- Access phpMyAdmin
- Find the
wp_userstable - Locate your admin user
- Edit the
user_passfield - Enter a new password and select MD5 from the function dropdown
Create New Admin User via Functions.php
Add this code to your theme's functions.php file:
function add_emergency_admin(){
}
add_action('init','add_emergency_admin');Visit your site once, then remove this code immediately for security.
Plugin and Theme Conflicts
Many WordPress errors stem from poorly coded plugins or themes.
Systematic Troubleshooting
- Deactivate all plugins
- Switch to a default theme
- Test if the error persists
- Reactivate plugins one by one
- Test after each activation
Keep notes of which plugin caused the issue. You can then contact the developer or find an alternative.
Memory Limit Errors
"Fatal error: Allowed memory size exhausted" means your site is trying to use more memory than allowed.
Permanent Solutions
- In wp-config.php:
ini_set('memory_limit', '512M'); - In .htaccess:
php_value memory_limit 512M - Contact your host if you regularly need more than 256MB
Consider optimising your site if memory usage is consistently high. Remove unused plugins, optimise images, and use caching.
Common Issues and Quick Fixes
Site loading slowly after making changes? Clear all caching plugins and check if the issue persists.
Getting "Sorry, this file type is not permitted"?
Add this to wp-config.php: define('ALLOW_UNFILTERED_UPLOADS', true);
Remove it after uploading your file.
Stuck in maintenance mode?
Delete the .maintenance file from your root directory.
Images not displaying properly? Check file permissions on your uploads folder (should be 755).
Prevention is Better Than Cure
Regular maintenance prevents most WordPress errors:
- Keep WordPress, themes, and plugins updated
- Run regular backups
- Monitor your site's performance
- Remove unused plugins and themes
- Use quality hosting (like our WordPress hosting service)
Our website maintenance packages handle all this automatically, giving you peace of mind.
When to Call for Help
Some errors require professional intervention:
- Malware infections
- Server configuration issues
- Complex database corruption
- Persistent errors after trying these fixes
Don't spend days fighting a problem that could be fixed in hours by someone experienced.
What's Next?
Now you know how to handle the most common WordPress errors. But prevention is always better than cure.
Consider using our free website audit tool to identify potential issues before they become problems. It checks for security vulnerabilities, performance issues, and other factors that could lead to errors.
For comprehensive protection, explore our WordPress maintenance services. We handle updates, backups, security monitoring, and troubleshooting so you can focus on running your business instead of fixing website problems.
Remember: most WordPress errors look worse than they are. With the right approach and a bit of patience, you can solve most issues yourself. Keep this guide bookmarked for when you need it.