Meddelandet ”Fel vid upprättande av en databasanslutning” i WordPress är ett allvarligt fel som gör din webbplats otillgänglig för användarna. Det inträffar när WordPress inte kan ansluta till databasen.
Eftersom flera faktorer kan påverka den här anslutningen kan felet vara lite svårt att felsöka för nybörjare.
Vi har drivit vår blogg på WordPress under de senaste 16 åren och har stött på en mängd olika fel och varningar, inklusive ”Fel vid upprättande av en databasanslutning”. Genom vår erfarenhet och många försök och misstag har vi lärt oss att felsöka dessa problem utan att störa vår webbplats.
I den här artikeln kommer vi att visa dig hur du enkelt fixar ”Error establishing a database connection” på din WordPress site, steg för steg.
Vad orsakar error vid upprättande av en anslutning till en database i WordPress?
En database är en programvara som gör det enkelt att lagra, organisera och hämta data från andra program.
Som ett system för hantering av innehåll använder WordPress en database för att lagra all your content och andra data på din website. Den ansluter sedan till databasen varje gång någon besöker din website.
WordPress behöver följande information för att ansluta till databasen:
- Namnet på din database
- Database användarnamn och password
- Server för databaser
Den här informationen lagras i din WordPress-konfigurationsfil, som heter wp-config.php.
Om någon av dessa uppgifter är felaktiga kommer WordPress att misslyckas med att ansluta till din server för databasen och du kommer att se felet ”Error establishing a database connection”.
Det är ett av de vanligaste WordPress error. Förutom felaktiga credentials kan detta error också dyka upp om databasens server är nere eller databasfilerna är korrupta.
Med detta sagt, låt oss ta en titt på hur man fixar ”Error establishing database connection” issue i WordPress med steg-för-steg troubleshoot.
1. Kontrollera din WordPress Database Credentials
Felaktiga autentiseringsuppgifter är den vanligaste orsakentill felet i databasanslutningen. Om du nyligen har flyttat din WordPress-webbplats till ett nytt webbhotell är det sannolikt detta som är problemet.
Credentials för din WordPress-databas lagras i filen wp-config.php. Det är konfigurationsfilen för WordPress som innehåller viktiga settings, inklusive information om databasen.
Om du ej har redigerat filen wp-config.php tidigare kan du ta en titt på vår guide för nybörjare om hur du redigerar filen wp-config.php för mer instruktioner.
Du kommer att leta efter följande rader i filen wp-config.php:
// ** MySQL settings - You can get this info from your web host ** //
/** The name of the database for WordPress */
define( 'DB_NAME', 'database_name_here' );
/** MySQL database username */
define( 'DB_USER', 'username_here' );
/** MySQL database password */
define( 'DB_PASSWORD', 'password_here' );
/** MySQL hostname */
define( 'DB_HOST', 'localhost' );
Här måste du se till att informationen om databasnamn, användarnamn, password och server är korrekt.
Du kan bekräfta denna information från instrumentpanelen för ditt WordPress dashboard. För denna tutorial kommer vi att använda Bluehost, men processen kommer att vara liknande för andra webbhotell paneler också.
När du har loggat in klickar du på fliken ”Website” i den vänstra kolumnen och växlar sedan till fliken ”Advanced”. Rulla sedan ner till sektionen ”Database” och klicka på knappen ”Manage” bredvid den.
Detta kommer att öppna sidan MySQL Databases i cPanel i ett new fönster.
Här kan du hitta ditt databasnamn och användarnamn i sektionen ”Current Database”. Tänk på att copy and paste dessa details till ett anteckningsblock så att du kan add to dem till wp-config-filen.
Därefter rullar du ner till sektionen ”Current Users”, där du kan clicka på länken ”Change Password” bredvid namnet på din database.
Du kommer då till en new vy där du kan ändra lösenordet för databasen så som du gillar det.
När du har bekräftat all din database details kan du ändra den informationen i din wp-config.php-fil om det behövs.
Efter det kan du försöka besöka din website igen för att se om error i anslutningen till databasen har försvunnit.
Om du fortfarande kan se error betyder det att något annat är fel.
2. Kontrollera informationen om servern för din Database
Om du är säker på att uppgifterna om databasens namn, användarnamn och password är korrekta, är det bra att kontrollera att du använder korrekt information om databasens server.
De flesta webbhotell för WordPress använder localhost som server för din database. Vissa hanterade WordPress-värdföretag använder dock separata servrar för att servera databaser. I så fall kommer din databas serverinformation inte att vara localhost.
Detta innebär att du måste kontakta ditt webbhotell för WordPress för att bekräfta dessa detaljer.
3. Reparera WordPress Database
Nu kanske du får ett annat fel i wp-admins instrumentpanel, till exempel ”En eller flera databastabeller är inte tillgängliga” eller ”Databasen kan behöva repareras”. I så fall måste du reparera din databas.
Du kan göra detta genom att lägga till följande rad i din wp-config.php-fil. Se till att add to den precis före ”That’s all, stop editing! Trevlig blogg”:
define('WP_ALLOW_REPAIR', true);
När du har gjort det kan du se inställningarna genom att besöka den här page: http://www.yoursite.com/wp-admin/maint/repair.php. Se bara till att ersätta yoursite.com med ditt eget domain name.
Här måste du klicka på knappen ”Repair Database” för att starta processen.
Note: Användaren behöver ej vara inloggad för att komma åt reparationssidan för databasen. När du är klar med att reparera och optimera din database, se till att ta bort den här kodraden från din wp-config.php.
Men om du inte vill lägga till någon kod på din webbplats kan du också reparera din databas med hjälp av ditt webbhotellkontos cPanel.
Gå vidare och besök ditt webbhotell konto, där du måste öppna sidan ”Websites” från den vänstra kolumnen. Gå sedan till tabben ”Advanced” och klicka på knappen ”Manage” i sectionen ”Database”.
Detta kommer att öppna cPanel i en new tab. Här rullar du ner till ”Modify Databases” section och väljer namnet på din database från ”Repair Database” dropdown menu.
När du har gjort det klickar du bara på knappen ”Reparera databas” för att starta processen.
Webbhotellets panel kommer nu automatiskt att reparera din database åt you.
När processen är completed kommer du också att se ett success message.
Du kan nu besöka din WordPress-webbplats för att se om felet har åtgärdats eller inte.
4. Kontrollera om din server i databasen är nere
Om allt verkar vara korrekt och WordPress fortfarande inte kan anslutas till databasen, kan din databasserver (MySQL server) vara nere.
Detta kan hända på grund av tung trafik på en server. Din server kan helt enkelt inte hantera hämtar (särskilt när du har delade webbhotell).
På grund av detta kommer din webbplats att bli långsam och kan till och med mata ut felet för vissa användare. I det här fallet bör du ringa eller livechatta med din hostingleverantör och fråga dem om din MySQL-server är responsiv.
Om du dessutom har andra webbplatser som körs på samma server kan du kontrollera dessa webbplatser för att bekräfta att din SQL-server är nere.
Om du ej har någon annan site på samma webbhotell account, så går du bara till din dashboard och byter till tabben ”Advanced”.
Därefter klickar du på knappen ”Hantera” bredvid phpMyAdmin section.
Detta öppnar phpMyAdmin i ett nytt fönster, där du måste klicka på alternativet ”Database” högst upp.
Därefter klickar du på namnet på din database för att komma åt dess Settings. Om du kan göra det, är det dags för dig att kontrollera om din databas användare har tillräckliga behörigheter.
För att göra detta måste du skapa en new fil som heter testconnection.php och klistra in följande kod i den:
<?php
$link = mysqli_connect('localhost', 'username', 'password');
if (!$link) {
die('Could not connect: ' . mysqli_error());
}
echo 'Connected successfully';
mysqli_close($link);
?>
När du klistrar in koden, se till att ersätta användarnamn och password med dina egna. Du kan nu uploada filen till din website och komma åt den via en web browser.
Om skriptet ansluts utan problem betyder det att din användare har tillräcklig behörighet och att det är något annat som orsakar error.
Nu måste du gå tillbaka till din wp-config-fil och skanna den för att se till att alla detaljer är korrekta och utan några stavfel.
Ytterligare lösningar som har fungerat för användare
Om de ovan nämnda felsökningstipsen inte lyckas fixa felet i anslutningen till databasen på din webbplats kan du prova dessa ytterligare steg.
Som våra användare har rapporterat har dessa steg hjälpt några av dem att lösa error i anslutning till databasen på sina webbplatser.
1. Update URL:en för WordPress site
Du kan försöka updating URL:en för WordPress site med hjälp av phpMyAdmin i cPanel.
Gå bara in på phpMyAdmin från din dashboard på webbhotellet och välj din WordPress database från listan.
Därefter växlar du till SQL-menyn högst upp och anger följande MySQL-fråga:
UPDATE wp_options SET option_value='YOUR_SITE_URL' WHERE option_name='siteurl'
Det ska se ut så här:
Glöm inte att ange din egen site URL och ändra wp_options till ditt eget tabellnamn, eftersom du kan ha ändrat WordPress tabellprefix.
2. Starta om web server
Användare på dedikerade servrar, språkversioner och virtuella privata servrar (VPS) kan försöka starta om sina servrar.
Detta kommer att starta om din web server och database server, vilket kan fixa några tillfälliga problem som orsakar error.
3. Be om hjälp
Om allt annat Misslyckas, då kan du behöva kontakta ditt webbhotell. Alla bra webbhotell för WordPress kommer att hjälpa dig att troubleshoota problemet, peka dig i rätt riktning eller till och med fixa det åt dig.
Du kan också anlita WordPress-utvecklare via en plattform som WPBeginner Pro Services för att hjälpa dig att lösa detta problem till rimliga priser. Vi har ett dedikerat team av expertutvecklare som du kan lita på för att lösa alla dina WordPress-problem.
Du kan också använda tjänsten för webbplatsunderhåll, reparation av hackad webbplats, hastighetsoptimering, ombyggnad av webbplats och SEO-optimering.
Vi hoppas att den här artikeln hjälpte dig att åtgärda problemet med ”Fel vid upprättande av en databasanslutning” i WordPress. Du kanske också vill se vår felsökningsguide för WordPress för tips om hur du löser WordPress-problem på egen hand eller vår handledning om hur du lägger till en anpassad databasfelsida i WordPress.
If you liked this article, then please subscribe to our YouTube Channel for WordPress video tutorials. You can also find us on Twitter and Facebook.
Syed Balkhi
Hey WPBeginner readers,
Did you know you can win exciting prizes by commenting on WPBeginner?
Every month, our top blog commenters will win HUGE rewards, including premium WordPress plugin licenses and cash prizes.
You can get more details about the contest from here.
Start sharing your thoughts below to stand a chance to win!
Javatechig
Lovely. You saved my day.
CE
Thank you!!!!!!!! Worked like a charm!!
Mark Larson
You’re so helpful! All my writing was saved! Yes, I need to do a backup… I did one! Thanks so much, this is just the resource I needed. Luckily Google pulled it right up.
Michael Simoni
I have a test wordpress installation on my home computer running on fedora. I moved/reinstalled the computer with a recent copy of fedora. I restored the database and the wordpress installation. Everything should have been fine except I had the ”cannot connect to the database” error. I have had this wordpress installation for a long time. Turns out that when I moved to the new server I also got a new my.cnf. Now I checked it and made everything the same but for some reason i did not add the following line in /etc/my.cnf. Maybe i just wanted to see what would happen. hmmm…what does this button do…..
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1
After I added that line, the database connection problem was fixed.
So I need to drop that user and recreate it with the new password format.
Note I also have
skip-networking
in /etc/my.cnf and….it works. That keeps mysql off the network, including 127.0.0.1. It’s just one less entry point for the mischief-makers.
Matt
I had a database-connection-error on a client’s site and could access the database via PHPMyAdmin but running the testconnect.php file suggested above came up with a response unlisted in this article:
”PHP Warning: mysql_connect(): No connection could be made because the target machine actively refused it.”
I got in touch with Fasthosts who my clients were with and it turned out that they had issues integrating PHP5.4 ”and the only fix is to reset the MySQL database user password.”
So if you’re in that boat, then you may be able to fix it by accessing the database via PHPMyAdmin and running the query:
SET SESSION old_passwords = 0;
SET PASSWORD = PASSWORD(’databasepasswordgoeshere’);
!! IMPORTANT NOTE !! : make sure you get ’databasepasswordgoeshere’ correct otherwise you’ll be resetting your db password to something new rather than the same password and it could break your site even further!
Terry
I must be really dumb! i understand a little of wordpress but this all sounds way out of my leage.
I have tried to do exactly what you have said and this is what I get
Warning: Cannot modify header information – headers already sent by (output started at /customers/8/a/3/chigwelltkd.com/httpd.www/wordpress/wp-config.php:2) in /customers/8/a/3/chigwelltkd.com/httpd.www/wordpress/wp-includes/functions.php on line 2801
Error establishing a database connection.
I have no idea what to do next!!!
Not only have i lost the site from the web but I know cannot get in to wordpress admin.
IS THERE ANY HOPE!!!!!
WPBeginner Support
Undo the changes by accessing your site through FTP.
Administratör
Rowan Weismiller
Thanks so much for writing this post, it saved me quite a bit of time and a lot of headaches. Cheers!
SH
Solved my issue in less than 10mins cause of this article
YOUR ARE DOPE…you mean business
Thanks a mil!!!
alin
thanks man it’s worked!
Diana
thanks. very good article
Nayonika
This tutorial has really helped solving my problem!! Thanx a ton!
Lyndsay
Thanks a lot, this helped me fix my websites!
Sumi Ghosh
Hi,
Recently i uploaded a theme to the wordpress site, i have also uploaded the local database. I have modified my wp-config file too. Still i am getting error database connection error. When i opened my wp-admin it redirecting to wp-login.
Can i know what might be the problem?
WPBeginner Support
We think its normal behavior for wordpress to redirect you to wp-login.php when you try to access wp-admin directory. Can you please explain further? have you checked your wp-config.php file? does it have your live site’s database information?
Administratör
Aliesha
I had 4 sites give a 127.0.0.1 ”Cannot connect to server” message & I also had no access to admin. I went through troubleshooting, & nothing helped. So, I contacted my web-hosting service, Bluehost, to inquire whether the MySQL server was responsive. The tech told me to login to my control panel’s File Manager, select ”Show hidden files,” and then to go inside my root directory for each domain & rename my .htaccess file to .htaccess.old . He said he guessed that a plugin added code to my .htaccess file, causing my wp-admin to redirect to an IP address. It worked.
WPBeginner Support
Glad that it worked. However, you should find the plugin responsible for that and delete it.
Administratör
Erik de Vries
Just got this error on my own website. wp-config.php was allright. PhpMyAdmin could load the database. When trying to open the wp_options table PhpMyAdmin said the table must be repaired. Using the repair function in PhpMyAdmin fixed the table, reporting one row had been removed (not saying which one). No clue as to what caused this.
Thanks for the article, helped me debug the error.
Ben
Just got this problem, checked db through host cPanel and admin user seems to have been removed from database assuming that is why wp cannot connect. Problem is my ftp also seems to have been knocked out so i am unable to apply any solutions! sub-domain seems to still be working. It’s difficult to imagine this as being anything other than malicious!
WPBeginner Support
Contact your web host for support.
Administratör
Zimbrul
I just got this problem with one of my sites and fixing the database from wp-config.php did not work. I fixed it by upgrading to WordPress 3.6.1 in cPanel (Softaculous).
Kyra Dawson
Thank you guys! Great How To article!
Ike
Today, for some reason my site is facing the database connection issue.
• Confirmed my database access is working via testconnection.php.
• Changed the salt keys with new ones.
• Defined the proper site URLs to ’WP_HOME’ and ’WP_SITEURL’
• No issue with server slowness as my other websites in other root directories are working.
I’m guessing it may be a plugin recently added?
How do you properly uninstall a plugin if you can’t pull up both wordpress root and wp-admin directories in the browser?
Thanks in advanced.
Editorial Staff
Refer to this article:
https://www.wpbeginner.com/plugins/how-to-deactivate-all-plugins-when-not-able-to-access-wp-admin/
Administratör
Anudeep
Thanks a lot for such a good article!
My problem was a bit different. I had this issue because of ’clicky analytics’ plugin.
I almost went mad as i didnt have any idea of what the problem could be. Finally after lot of trial and error i figured out that it was a plugin interference.
Giorgos
Thanks for the post
Is work to me
Naman Agrawal
Huh! sir you deserve an award.
It just worked for me. I was having this problem from last one month and you just served with this.
Thank you very much
Roeland Sanctorum
Problem occured when requesting new password and didn’t realise this was going to create a db problem. Fortunately I found your comments and guidelines. Problem solved in 3 minutes.
Thanks again (now I’ve subscribed to your weekly email)
Editorial Staff
Thanks Roeland
Glad we were able to help.
Administratör
Tamela
My problem happened when I moved the site to a new hosting. I’d altered the config file to match my new database, username & password. But nothing worked.
Your tip about checking the WP-admin page did the trick. It told me something was wrong with the username. I went into c-panel and realized I hadn’t tied the user to the database. Two seconds later, all was good!
You potentially saved me hours of testing the wrong things! Thanks!
Editorial Staff
Glad we were able to help
Administratör
Stu Farrimond
I want to give you a big kiss.
VERY useful.
However, my issue seemed a little odd – and it might help someone else:
This morning our domain produced error:
Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 30720 bytes) in /home/gurumaga/public_html/wp-admin/includes/class-wp-list-table.php on line 384
I tried to increase PHP memory allocation.
Added to wp-settings (in root folder):
define(’WP_MAX_MEMORY_LIMIT’, ’256M’);
resulted in:
’Error establishing a database connection’
Removed line and added lower limit:
define(’WP_MEMORY_LIMIT’, ’64M’);
resulted in:
’Error establishing a database connection’
Removed all changes in wp-settings.php now as original.
’Error establishing a database connection’ persisted (for 5 – 10 mins)
Before reverting to the original error:
Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 30720 bytes) in /home/gurumaga/public_html/wp-admin/includes/class-wp-list-table.php on line 384
I increased the PHP memory limit to: define(’WP_MEMORY_LIMIT’, ’64M’); again
Then ran the database repair as you advised.
Although no database errors were identified, the site is now back up and running.
Odd – I’m not sure if you or anyone else can make sense of it??
Jamila
THANK YOU.
Editorial Staff
You are welcome
Administratör
Donatus
Thank you so much, i have repair my own and is working perfectly. my site is back
Michael
Embarrassed… I tried everything in this blog and was double checking everything…
It never occurred to me that I’d typo’ed when entering the password.
Doh! So, here’s a +! for double checking the basics
Shaqinah
Hi, I made the mistake of changing the home url, initially it was http://shaneynayguns.com/wordpress and the site url was: http://shaneynayguns.com/wordpress too. I then changed the site url to http://shaneynayguns.com (thinking that that will make my site go live, as you can tell I’m an absolute idiot at this). Nothing happened, so genius here, changed the home url to shaneynayguns.com. That’s when things start to go awry: I couldn’t log in to wp-admin anymore and going to .com/wordpress redirects me to an error page. (shaneynayguns.com remain unchanged and directs to a landing page) I then went on to a forum and followed the exact instructions which were:
1. go to phpmyadmin
2. go to the correct database
3. browse wp_option
4. edit site url (I changed it to .com/wordpress)
Apparently based on everyone’s comments, it worked for all of them… except me! shaneynayguns.com/wordpress now redirects to a page with ”error establishing a database connection”! It’s driving me mental! I was hoping if any of you could help me with this. As is obvious, I have not a clue when it comes to web jargon so I would really appreciate a simplified solution. Yes I’m an idiot, and I terribly need help! (F.Y.I: I host on godaddy)
Thanks in advance!
Editorial Staff
Open your wp-config.php file and add this:
define('WP_HOME', 'http://shaneynayguns.com/wordpress'); define('WP_SITEURL', 'http://shaneynayguns.com/wordpress');1-click Use in WordPress
Administratör
Anderson Tagata
Hey, this worked for me. My wordpress website is on Godaddy and i was trying to put inside of subdirectory. now it works. Just after this, show up some database upgrade screen then everything is fine. also, i took out these defines above and still working. thanks.
Zac
Thanks heaps for your info guide, helped me fix my problem.
To let you know my resolve, I could not see a typo in the wp-config.php but decided to delete my Database and linked Username. I then created new ones and manually updated the new data into the wp-config and boom straight in. One thing to note is the database and username were originally the same name, so not sure if that was an issue as its a new site.
Seth
My website is down and I keep getting ”Error establishing database connection” message.
I checked my WP-Config.php page and it looks fine on the inside, but when I preview it, the page says this
Warning: require_once(reddoorplayhouse.com/open/wp-settings.php) [function.require-once]: failed to open stream: No such file or directory in /hermes/waloraweb096/b619/moo.reddoor1/wp-config.php on line 95
Fatal error: require_once() [function.require]: Failed opening required ’reddoorplayhouse.com/open/wp-settings.php’ (include_path=’.:/usr/local/lib/php-5.2.17/lib/php’) in /hermes/waloraweb096/b619/moo.reddoor1/wp-config.php on line 95
What does that mean. And what can I do? Thanks for your help.
Michael Tidwell
This is a frustrating problem that has been happening multiple times to a few of my sites over the past few weeks. I can fix it easily enough by replacing the Unique Keys and Salts in my wp-config.php file (grabbing new ones at: https://api.wordpress.org/secret-key/1.1/salt), but then days later I have to replace them again… so while I can fix the symptom, I’m still trying to determine why this keeps happening at http://brioagency.com
Editorial Staff
This can be caused by a plugin that you have if it is messing with your settings.
Administratör
manesh
Thanks a lot man, repairing the database fixed my issue!
Andrew Stark
Hi
Just thought I’d thank you for helping me fix a site.
Changing localhost to the database IP address fixed my issue.
Thanks
Andrew
Editorial Staff
Thanks for leaving a comment Andrew. Glad to help
Administratör
Madhurie Singh
I had made copies of the files and saved them on the server.
So when today the database connection error occured, I relaized, I had changed user, , pwd, database access but nothing worked.
So renamed the current wp-config.php as wp-configold.php
and copied the wp-config.php from the archive and pasted as wp-config.php.
Voila it works.
Michael Stelly
Forgot that the database is ”local” to the application. I used the site URL by mistake. Switched DB_HOST to ’localhost’ and all is golden.
Thanks for the blog! +1
Ben
You know sometimes you just find the perfect resource and it answers all your questions. I tip people for pouring me a cup of coffee. I wish it was super easy to just put a buck or two in the wpbeginner tip jar right now, but I guess a thanks will have to do.
Editorial Staff
Thanks Ben. Its always our pleasure to help. The best way to thank us is by spreading kind words about our site or by simply sharing this article on twitter, facebook, etc
Administratör
jAMIE
WP Beginner is just awesome & so is Syed! I don’t know how many times my search results have let me to your site and each time, I’ve learned something really helpful, useful, & practical.
This time, with my database connection error issue, I just had to clear my browser’s cache. FML Anyways, that was the advice that I got after contacting my host. It seems to have worked & hopefully that’s all it takes! How to prevent it from happening again is above me.
Mibo
All I have to say: ”THANK YOU!”
your post fixed my issues and spared me a couple of hours of work.
Fre
For me the issue was solved by properly setting “siteurl” and “home” in wp_options table did the trick for me, I could log into my admin and change everything!
One day I’ll buy you a cookie!!
Julie Anderson
I have a big problem… i did not set the site up and do not have axxess to the php or any files. i was trying to add pages and the next time i visited the site there was the error. Do i need to get to the admin initiator etc, is there no other way into the site?
Editorial Staff
You need to have admin access to the site.
Administratör
umar satti
You are My HERO
Stephen Doxsee
I get this error intermittently. Perhaps I don’t have enough resources on my amazon ec2 free tier instance. I’ve had the problem 3 times in the last week but have been able to solve it each time by restarting the database server.
Thanks for the post
udumbuke
For me issue was solved by properly setting ”siteurl” and ”home” in wp_options table
Mana
Thank you so much, Udumbuke. This was exactly the step I forgot in moving my site to a new host. I’m so glad I can stop headaching over this! And great guide altogether on this site.
Joyce Keller
This error happened to me because I wanted to back up my database and could not remember the password. I changed the password in GoDaddy – but this didn’t change it in the wp-config.php! Once I changed it in wp-config, everything worked okay again.
THANK YOU FOR SUCH A COMPREHENSIVE SOLUTION!!! And a truly useful site. Kudos!
JD
In step review of wp-config.php you have to consider the user name and password that is there in the file, the user may not exist in the database (mysql), the password has changed so check if there is the user. In case the user does not exist in the database create it, assign the password found in wp-config.php and provide permits for administration of the database (DBA).
This happened to me to restore my wordpress.
Oliver Wieland
Thanks dude! Restored my database and all i needed to do then was reassign the correct user with the correct database in cpanel.
Pat Walsh
Hi guys, thanks for this info.
Helped me to fix a problem with a WordPress site I created.
It had been happily running for over a month when it started having the ”Error Establishing a Database Connection” error.
Finally fixed it by changing DB_HOST to use the full host name rather than the ’localhost’ that had been in there before.
I don’t know why it worked initially and then stopped working. But its working now…
Cheers,
Pat Walsh
Forma
Having the same connection to DB problem, and after reading comments, I decided to change the wp.config file refrence to my actual host to localhost and for some reason that fixed it. So my solution was the opposite to the one above. Just a shot in the dark…
arman
it is indeed helpful for me as i m facing this problem currently… thanks for this great article..
Arifur Rahman
I’m getting this issue temporary at my site just for few seconds.
how can I be free from this?
Please help!
Editorial Staff
Find the root cause. It can be caused by a plugin. Or simply you need to upgrade your hosting plan if you are getting tons of traffic.
Administratör
Arifur Rahman
Thank you,
I already upgrade my hosting plan from basic to Pro.
But still same as before.
I using Adminimize, AG Custom Admin, Akismet, BuddyPress Template Pack, Display widgets, Fast Secure Contact Form, Google XML Sitemaps, Jetpack by WordPress.com, Page Views Count, Polldaddy Polls & Ratings, User Switching, Better WP Security, BuddyPress, Hotfix, W3 Total Cache, wordPress Importer and WordPress SEO.
Which one is making problem??
Have you any Idea?
Eduardo Capanema
If you have all the info in the config file correct and is still having the problem, check to see if you have any spam prevention plugin active such as Fail2Ban. I found that it was causing the database problem. I believe it happens cause when you’re editing the wordpress via wp-admin, you make too many sequence requests to the apache it triggers the Fail2Ban service for www-data user. Try uninstalling Fail2Ban or any other spam controller. Then, restart both mysql server and apache to get hid of the Error message.
I hope this helps.
b
Stefano
Thank you guys. Problem solved. Very good post