PHP $link=mysql_connect ("localhost" "root" ");

PHP $link=mysql_connect ("localhost", "root", "");
Local System Apache 2.2.22+php5.3.9+mysql 5.5, PHP5.3.9 cannot connect to MySQL 5.5 when running the following program
$link =mysql_connect (' localhost ', ' root ', ');

if ($link) echo "Connection succeeded";
else echo "Connection failed";
Mysql_close ();
?>
Use this method to verify that MySQL is installed successfully.
Why is the parse Error:syntax error displayed, unexpected t_string, expecting ', ' or '; ' on line 5
There should be no syntax errors.

------Solution--------------------
PHP root directory to the beginning of those Lib and NT to copy into the System32 directory
Another is to change the php.ini configuration file inside the Ext path to the correct directory location of PHP

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