Re: PgSQL and integration between 2 PHP programs and a Java program

Hi

First tI should thank Brew and Juan for their kind help.
Second it seems that the php applications doesn't use ADODB as here's a
sample DB connection function of one of the PHP sctipts :

[code]

class DB {

function DB(){

$this->values = array();

}//DB

function connect() {

$this->conn_id = mysql_connect(SQL_HOST, SQL_USER, SQL_PASS,1);
mysql_select_db(SQL_DB,$this->conn_id);
$version = $this->version();

if($version >= 4.1){
$encoding = extract_encoding("mysql");
if($encoding){
$sql_query = "SET NAMES '".$encoding."'";
$this->execute($sql_query);
}//if
}//if

}//connect

function disconnect(){

if($this->conn_id)
@mysql_close($this->conn_id);

}//disconnect

function version(){

$sql_query = "SELECT VERSION()";
$version = $this->single($sql_query);
$version = ereg_replace("[^0-9|\.]","",$version);
return $version;

}//version

function execute($sql_query) {

if(!$this->conn_id){

$this->connect();

}//if

preg_match_all("/\:[A-Za-z|0-9|_]{1,}\:/",$sql_query,$matches);

$patterns = $matches[0];

while(list(,$val) = each($patterns)){
$key = substr($val,1,strlen($val)-2);
$value = stripslashes($this->values[$key]);
$sql_query =
hs_ereg_replace($val,mysql_escape_string($value),$sql_query);
}//while

reset($this->values);

$this->sql_result = mysql_query($sql_query,$this->conn_id);

if(!$this->sql_result && !hs_ereg("^LOCK TABLES",$sql_query) &&
$sql_query!="UNLOCK TABLES"){
die($sql_query.":".mysql_error($this->conn_id));
}//if

return $this->sql_result;

}//execute

function insert($sql_query){

if((!$this->sql_result)||($sql_query != $this->sql_query)){

$this->execute($sql_query);

}//if

$this->clean();
return mysql_insert_id($this->conn_id);

}//insert

function update($sql_query){

if((!$this->sql_result)||($sql_query != $this->sql_query)){

$this->execute($sql_query);

}//if

$this->clean();
return mysql_affected_rows($this->conn_id);

}//update

function fetch($sql_query){

if((!$this->sql_result)||($sql_query != $this->sql_query)){

$this->execute($sql_query);

}//if

$this->sql_query = $sql_query;
$result = @mysql_fetch_object($this->sql_result);
if(!$result)
$this->clean();

return $result;

}//fetch

function row($sql_query){

if((!$this->sql_result)||($sql_query != $this->sql_query)){

$this->execute($sql_query);

}//if

$this->sql_query = $sql_query;
$result = @mysql_fetch_assoc($this->sql_result);
if(!$result)
$this->clean();

return $result;

}//row

function result($sql_query){

$ret_array = array();

while($this->res = $this->row($sql_query)){

$ret_array[] = $this->res;

}//while

@mysql_free_result($this->res);
$this->clean();
return $ret_array;

}//result

function single($sql_query){

$this->execute($sql_query);
$this->clean();
return @mysql_result($this->sql_result,0);

}//single

function lock($table){

$sql_query="LOCK TABLES `".$table."` WRITE";
$this->execute($sql_query);

}//lock

function unlock(){

$sql_query="UNLOCK TABLES";
$this->execute($sql_query);

}//unlock

function clean(){

$this->sql_query = "";

}//clean

}//DB class
$DB = new DB;

[/code]

Well, this way I think I would need very much modification in source codes
to make the PHP scripts talk to a PgSQL server :(
After all I have thought of 3 methods of integration. I would like everyone
who have an experience to share it with me and vote for the best methd that
comes to your mind :

1. change the PHP programs somehow that the registration and password
modification ( and maybe profile editing ) won't be accessed. This way I
will write a centralized registeration and editing script where users can
register and update their profile. When a user is registered or updated all
the new information including username, password, name, last_name, address
an etc will be updated in all connected databased + LDAP server. This way
for example user "sample" with pass "sample" will be stored in almost 10
databases + LDAP server. Then each application will read from its own
database ( MySQL, PgSQL or LDAP ) and authenticates the user. Also CAS can
be integrated using LDAP as the main directory service and phpCAS or JavaCas
as the client ticketing system.
Pros : no change in any PHP or Java applications, but just integration of
CAS for authentication. Centeral user managemet like what Yahoo offers (
Account Setting in Yahoo ). Seprate databased for each application that
maybe increases security.
Cons : Huge amount of data duplication as each username. password, address
and other related fields will be the same in many databases! , High database
loads due to multiple UPDATE of several tables in different DBs.

2. Change all the applications to use PgSQL and share the same database.
Pros : No data duplication, fast database access ( no high loads like method
no.1 )
Cons : Heavy source code editing

3. Change all the applications to use LDAP.
Pros : No data duplication, fast database access ( no high loads like method
no.1 )
Cons : Heavy source code editing, I'm not sure if LDAP can handle this much
insert & update queries as it's mostly a directory service and is not
usefull to be used as a dabatase for other informations like profiles and
etc.

--

Warm Regards,
Amir