MySQL
Can't connect to local MySQL server through socket '/var/run/mysql/mysql.sock' (13)
Le code d'erreur 13 signifie "Permission denied".
Si ce messagge d'erreur survient dans un script PHP éxécuté sous Apache,
<?php $connection = mysql_connect('localhost', 'user', 'password', 'database'); if (mysql_errno()) { printf("Connection failed: %s\n", mysql_error()); } else { printf("Connection succeeded\n"); } ?>