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03-11-2008, 02:02 PM #1
- Join Date
- Sep 2007
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question about querying 2 databases in php
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
presently my code is
$conn = mysql_connect($hostname, $user, $dbpassword);
$insertqueryresult = mysql_query($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.
03-11-2008, 05:08 PM #2
- Join Date
- Dec 2004
- In a place far, far away...
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