Php connection to mysql, oracle, and mssql database connection code

The php connection mssql code is as follows: $ server #39; hbds3 #39; $ username #39; username #39; nbs... php connection mssql code is as follows:

$ Server = 'hbds3'; $ username = 'username'; $ password = 'pwd'; $ database = 'database'; $ conn = mssql_connect ($ server, $ username, $ password) or die ("couldn't connect to SQL server on $ server"); $ db = mssql_select_db ($ database) or die ("couldn't open database $ database ");

The php code for connecting to oracle is as follows:

$ Conn = oci_connect ("databasename", "passwd", "sid"); if (! $ Conn) {$ e = oci_error (); trigger_error (htmlentities ($ e ['message'], ent_quotes), e_user_error );}

Php connects to mysql with the following code:

$ Conn = mysql_connect ("localhost", "root", "admin") or die ("database server connection error ". mysql_error (); mysql_select_db ("admin", $ conn) or die ("database access error ". mysql_error (); // open-source code phprm.com mysql_query ("set names gb2312 ");

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