mysqli connection problem

hi
this is php 5.3.8 and mysql 5.5

both has been installed from source .

and from phpinfo.. i can see php has mysqli support. , see  bellow.

mysqli
MysqlI Support      enabled
Client API library version       5.5.17
Active Persistent Links       0
Inactive Persistent Links       0
Active Links       0
Client API header version       5.5.17
MYSQLI_SOCKET       mysqld.sock


and mysql is running as this :

 ps aux | grep mysql
root     15607  0.0  0.0  63876  1252 pts/4    S    17:08   0:00 /bin/sh /usr/local/mysql/bin/mysqld_safe --defaults-file=/etc/my.cnf
mysql    16244  0.0  2.2 4907936 364452 pts/4  Sl   17:09   0:00 /usr/local/mysql/bin/mysqld --defaults-file=/etc/my.cnf --basedir=/usr/local/mysql --datadir=/DB/data --plugin-dir=/usr/local/mysql/lib/plugin --user=mysql --log-error=/DB/data/posrep.err --open-files-limit=8192 --pid-file=/DB/data/posrep.pid --socket=mysqld.sock --port=3306


When i try to connect mysql from console i connect like this :
/usr/local/mysql/bin/mysql -uroot -S /DB/data/mysqld.sock -p


now problem is :
when i am trying to use mysqli wiht php .. its seems like its does not connect or it does not get any output form script.

when i execute bellow code. i get bellow error

Warning: mysqli_connect(): (HY000/2002): Can't connect to local MySQL server through socket 'mysqld.sock' (2) in /usr/local/apache/htdocs/mysql.php on line 3 Can't connect to local MySQL server through socket 'mysqld.sock' (2) Warning: mysqli_real_escape_string() expects parameter 1 to be mysqli, boolean given in /usr/local/apache/htdocs/mysql.php on line 14 Warning: mysqli_query() expects parameter 1 to be mysqli, boolean given in /usr/local/apache/htdocs/mysql.php on line 18 Warning: mysqli_close() expects parameter 1 to be mysqli, boolean given in /usr/local/apache/htdocs/mysql.php on line 33

now dont understand . where is the issue ??
can any one point me out..
is this php cant connect to mysql via mysqli  or the script has problem ??

Thanks for your help .

<?php
// Connect to database
        $link = mysqli_connect('localhost','root','xxxxx','dbname');

        // Check for Errors
        if(mysqli_connect_errno()){
          echo mysqli_connect_error();
        }

        // Prepare Query
        $query = "SELECT * FROM reportschedule r";

        // Escape Query
        $query = mysqli_real_escape_string($link,$query);


        // Perform Query
        if($result = mysqli_query($link,$query)){

         // Cycle through results
         while($row = mysqli_fetch_object($result)){
           echo $row->column;
         }


         // Free Result Set
         mysqli_free_result($result);


        }

        // Close Connection
        mysqli_close($link);
?>

Select all Open in new window