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Re: using global variables in the database connection string

Posted by frothpoker on 06/20/06 22:22

Thanks for that, I managed to find the include file solution elsewhere
but thanks anyway...

The global db$ is what I was looking for.....

Cheers guys

Juliette wrote:
> frothpoker wrote:
> > Guys,
> >
> > I'm sure this has been asked a million times but I can't seem to
> > formulate a google search that returns what i'm looking for.
> >
> > I've go a dev and live environment. Currently the DB connect string is
> > hard coded into each php file which means i'm going to have to change
> > every page - Arrgh!!
> >
> > If i put the DBonnect into a function and store it in an include file,
> > it doesn't seem to work, Also the connetion works with inline PHP
> > statements, but I have to repeat it in every function even if they are
> > in the main php file??? which doesn't seem right to me..
> >
> > I need to either :-
> >
> > Store the connection variables in an include file and retrieve them as
> > global values
> >
> > OR
> >
> > Store the connection string in a function in an include file which can
> > be accessed by all functions.
> >
> > also do I really have to call the dbconnect inside every function.
> >
> > Please note, if it makes any difference, I still havn't got my head
> > round OO programming in PHP so it is still pretty much procedural. I
> > am using PEAR but dont really understand (or care at the moment) about
> > what it is doing.
> >
> > Thanks in advance
> >
> > Aaron
> >
>
>
> Aaron,
>
> I'm trying to figure out what you are trying to ask, this is what I
> figure so far:
>
> 1. You want to have an easy way to change your connection variables
> between your development and live environment.
>
> Suggestion:
> At the start of each file which makes a db connection:
>
> include( path/to/file/dbconfig.inc );
>
> In dbconfig.inc all you have is:
> <?php
> $dbuser = 'username';
> $dbpass = 'password';
> $dbhost = 'yourhost';
> $dbname = 'database_name';
> ?>
>
> Presuming you use a mysql database, you make a connection like this:
>
> $db = mysql_connect($dbhost, $dbuser, $dbpass);
> mysql_select_db($dbname);
>
> Of course the dbconfig.inc file which you use for the server will have
> different values for the variables than the one you use for your local
> setup.
>
> You could even add the connection making statements to the included
> file, just don't put it in a function call within the included file.
>
>
> 2. You seem to think you need to re-make your connection each and every
> time you make a db call.
>
> You don't.
> If you make a query call to the database from within a function, do this:
>
> function myfunction($arg1, $arg2) {
> global $db;
> ... (whatever else you want to do in the function)
> }
>
> If that's not enough, identify your connection explicitly:
> mysql_query ( 'SQL statement', $db );
>
> Hope this helps,
> Juliette

 

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