PHP PDO Connection Database

<?php/** * Declares an array to hold the database link information */$C = array ();/** * holds relevant information in the database link information array */$C [' db_host '] = ' localhost '; $C [' db_user '] = ' root ';  $C [' db_pass '] = ' 123456 ';  $C [' db_name '] = ' db_test ';  /**  * Cyclic Generation Constants *  /foreach ($C as $name + = $val) {     define ($name, $val);}/**  * Link Database with PDO */  $dbo = n EW PDO ("mysql:host="). Db_host. ";d bname=". Db_name. "","" . Db_user. "","" . Db_pass. "") or Die ("Database link Failed");  /**  * Try to write an example of a linked database *  /try{$rs = $dbo, Prepare ("SELECT * from ' Test ');  $rs->execute ();  $results = $rs->fetchall (PDO::FETCH_ASSOC);  $dbo = null;  Print_r ($results);} catch (Exception $e) {print $e->getmessage (); exit;} /*end of File db.class.php*/

　　

PHP PDO Connection Database