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mysql_query("INSERT INTO user (identifiant) VALUES ('$sd04')") or die ('Erreur de selection ERREUR 1700 '.mysql_error());

Erreur de selection ERREUR 1700 Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)

mysql_query("INSERT INTO user (identifiant) VALUES ('$sd04')") or die ('Erreur de selection ERREUR 1700 '.mysql_error());

mysql_query("INSERT INTO user (identifiant) VALUES ('".$sd04."')") or die ('Erreur de selection ERREUR 1700 '.mysql_error());

[2.3] The error message "Warning: MySQL Connection Failed: Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)..." is displayed. What can I do?

For RedHat users, Harald Legner suggests this on the mailing list:

On my RedHat-Box the socket of MySQL is /var/lib/mysql/mysql.sock. In your php.ini you will find a line
mysql.default_socket = /tmp/mysql.sock
change it to
mysql.default_socket = /var/lib/mysql/mysql.sock
Then restart apache and it will work.

Here is a fix suggested by Brad Ummer:

First, you need to determine what socket is being used by MySQL.
To do this, telnet to your server and go to the MySQL bin directory. In this directory there should be a file named mysqladmin. Type ./mysqladmin variables, and this should give you a bunch of info about your MySQL server, including the socket (/tmp/mysql.sock, for example).
Then, you need to tell PHP to use this socket.
Assuming you are using PHP 3.0.10 or better, you can specify the socket to use when you open the connection. To do this in phpMyAdmin, you need to complete the socket information in the config.inc.php.
For example: $cfg['Servers'][$i]['socket'] = '/tmp/mysql.sock';

Please also make sure that the permissions of this file allow to be readable by your webserver (i.e. '0755').
Have also a look at the corresponding section of the MySQL documentation.

J'ai encore cherché du coté de la dcumentation de phpmyadmin, et j'ai trouvé quelques chose en anglais qui s'en approche peut être

Si tu rencontres ce problème chez un hébergeur, lui as-tu demandé de l'aide?

Quand tout le reste a échoué, lisez le mode d'emploi...

Tu aurai pas un mode d'emploi pour ce genre de situation ? merci ^^

<?php
$db = mysql_connect('db557.1and1.fr', '****', '****')  or die ('Erreur de connexion'.mysql_error()); 
mysql_select_db('****',$db)  or die('Erreur de selection '.mysql_error());
?>