Can't connect to local MySQL server through socket

Question

i m getting error on my site when i upload it. on submitting some pages error comes

mysql_real_escape_string() [function.mysql-real-escape-string]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) 

what means by this?

Answer 1

Since the error is being thrown by the call to mysql_real_escape_string() it rather implies that you didn't call mysql_connect() first and pass a valid db handle to mysql_real_escape_string (or the call to mysql_connect() failed).

In some circumstances, the mysql extension will attempt to connect automatically using the default settings in php.ini, failing over to my.cnf if these are not available - which obviously are not valid. Or it may be that the settings are valid but the mysqld is not running.

Have you got scripts which are connecting to the database successfully?

Do you have a username and password for the database?

Try:

check_running();

$user=''; // fill in your details
$password=''; // fill in your details

$hosts=array(
  'localhost', '127.0.0.1', $_SERVER['HTTP_HOST'], $_SERVER['SERVER_ADDR']
);
foreach ($hosts as $addr) {
   try_con($addr, $user, $password);
   try_con($addr . ':3306', $user, $password);
}

function try_con($host, $user, $password)
{
 $dbh=mysql_connect($host, $user, $password);
 if ($dbh) {
     print "Connected OK with $host, $user, $password<br />\n";
 } else {
     print "Failed with $host, $user, $password<br />\n";
 }
}

function check_running()
{
   // this assumes that you are using Apache on a Unix/Linux box
   $chk=`ps -ef | grep httpd | grep -v grep`;
   if ($chk) {
      print "Checking for mysqld process: " . `ps -ef | grep mysqld | grep -v grep` . "<br />\n";
   } else {
       print "Cannot check mysqld process<br />\n";
   }
 }

HTH

C.