querying 2 databases in php

[runway27]

i am building a registration page where a user register for a username. i am able to insert this into mysql. the situation is every time data is inserted into example table1 in mysql in database1 for example at the same time i would like to extract the username, password and email from table1 based on the last inserted row and insert these values into another table ex table2 in a different database called database2.

the issue i am having is with the select query as it is not returning values from table1 for me to insert those values into

table2 in database2.

NOTE = the hostname, user name, password are the same for both the tables and databases and are physically in 1 server machine itself.

presently my code is

$conn = mysql_connect($hostname, $user, $dbpassword);
 
if(!$conn)
{ 
 
}
else
{
mysql_select_db($database, $conn);
$insertqueryresult = mysql_query($insertqueryfortable1);       
$lastid = mysql_insert_id();
 
$selectqueryoftable1 = "Select username, password, email from table1 where slno = '$lastid'";
slno is an autoincrement and primary key which is like a serial number
 
$selectunempsq = mysql_query($selectqueryoftable1);
 
while($rowunemps = mysql_fetch_assoc($selectunempsq))
{
$unis = $rowunemps['username'];
$psis = $rowunemps['password'];
$emis = $rowunemps['email'];
}
 
$insertqueryfortable2 = "Insert into table2(username, password, email) VALUES ('$unis', '$psis', '$emis')";
 
$unpsemresult = mysql_query($insertqueryfortable2);
 

the values in the 3 variables $unis, $psis, $emis are blank.

i have tried
a) while($rowunemps = mysql_fetch_array($selectunempsq))
b) creating the table2 in database1 itself to see if it works
but both these methods is not working

data is being inserted into table1 but i am not able to read the values stored in table1 and then insert into table2. i have used echoing the values of the 3 variables $unis, $psis, $emis however the values are blank. with the insertquery for table2 everytime the insert query is executed a new row is created but there are no values for the 3 fileds username, password, email in table2

initially i had $conn = mysql_connect($hostname, $user, $dbpassword); 2 times as the tables were in different database now i have only 1 mysql_connect

please advice how to fix this ideally both tables sitting in different databases.

thanks.

[ronverdonk]

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[ronverdonk]

You should test the status of each MySQL function after executing it by checking the false or true result. A statement should be something like:[php]$selectunempsq = mysql_query($selectqueryoftable1)
or die("SELECT error: ".mysql_error());[/php]That is the only way to see if the error you presumed is really that and not the result of the execution of an invalid SQL statement.

Ronald