[PHP] Checking database for a value
hello friends, I am looking into 4 books in front of me but somehow cannot find the following : I have a field userid which the user fills in at registration. Before entering the data into the database, I want to check if the userid exists in the database. Can someone tell me the name of the function I must use, I will look for the rest in the php dictionary. Thanks Denis -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Checking database for a value
DLM I have a field userid which the user fills in at registration. Before DLM entering the data into the database, I want to check if the userid exists in DLM the database. You have to SELECT that user from the table you store your users: SELECT userid, name , etc FROM table WHERE userid='$your_id' if *_num_rows() 0 then he is already in, otherwise you can add him: INSERT . INTO table Enjoy! -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Checking database for a value
On Sun, 21 Apr 2002, Denis L. Menezes wrote:
I am looking into 4 books in front of me but somehow cannot find the
following :
I have a field userid which the user fills in at registration. Before
entering the data into the database, I want to check if the userid exists in
the database.
Can someone tell me the name of the function I must use, I will look for the
rest in the php dictionary.
Say you're using MySQL...
$userid = 'bob';
$sql = select userid from user where userid='$userid';
$st = mysql_query($sql);
if (mysql_num_rows($st))
{
print pUserID b$userid/b already in use./p;
}
else
{
print 'pNow adding you to the database.../p';
// ...
}
miguel
--
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Re: [PHP] Checking database for a value
On Sunday 21 April 2002 00:55, Denis L. Menezes wrote: hello friends, I am looking into 4 books in front of me but somehow cannot find the following : I have a field userid which the user fills in at registration. Before entering the data into the database, I want to check if the userid exists in the database. Can someone tell me the name of the function I must use, I will look for the rest in the php dictionary. AFAIK there are no built-in functions to do that. You need to run a query like SELECT userid FROM table then see whether any rows are returned. If you use this often you can wrap it up in a function. -- Jason Wong - Gremlins Associates - www.gremlins.com.hk Open Source Software Systems Integrators * Web Design Hosting * Internet Intranet Applications Development * /* I'm reporting for duty as a modern person. I want to do the Latin Hustle now! */ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Checking database for a value
On Sunday 21 April 2002 01:10, Jason Wong wrote: On Sunday 21 April 2002 00:55, Denis L. Menezes wrote: hello friends, I am looking into 4 books in front of me but somehow cannot find the following : I have a field userid which the user fills in at registration. Before entering the data into the database, I want to check if the userid exists in the database. Can someone tell me the name of the function I must use, I will look for the rest in the php dictionary. AFAIK there are no built-in functions to do that. You need to run a query like SELECT userid FROM table then see whether any rows are returned. If you use this often you can wrap it up in a function. That of course should be: SELECT userid FROM table WHERE userid='user_id_to_check' I better get some sleep :) -- Jason Wong - Gremlins Associates - www.gremlins.com.hk Open Source Software Systems Integrators * Web Design Hosting * Internet Intranet Applications Development * /* Delta: We never make the same mistake three times. -- David Letterman */ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
