Here's some functions I use in my development which save on connect and
query calls for me.
//General Purpose Utilities.
//db_connect connects to the database server and selects the proper
database.
//Arguments: None
//Returns: Nothing
function db_connect() {
mysql_pconnect("localhost","username","password");
mysql_select_db("Database");
}
//db_query queries the database server and returns the results.
//Arguments: SQL query string
//Returns: Query results
function db_query($query) {
return mysql_query($query);
}
//db_fetch returns the next set of results from a db_query.
//Arguments: db_query results variable
//Returns: Next set of query results as an array or 0 if no further
results are present
function db_fetch($results) {
return mysql_fetch_array($results);
}
//db_numrows returns the number of rows selected from a query.
//Arguments: query result
//Returns: number of rows in the query result
function db_numrows($result) {
return mysql_num_rows($result);
}
//Always connect to the database!
db_connect();
Keep these in an include file. The db_connect(); goes at the bottom and
keep the connection open during the routines.
To call db_query you would use it like:
$someQuery = db_query("SELECT * from someTable ....");
to get the results out of the query you would call db_fetch and use it
like:
$someResult = db_fetch($someQuery);
If you needed to return an array you would use it with a while or for
statement like:
While ($someResult = db_fetch($someQuery)) {
}
If you needed to get the number of rows from the query you'd use like:
numRows = db_numrows($someQuery);
or
if (db_numrows($someQuery) > ...)
These are just some thing I use to make my life easier.
Hope it helps
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: August 6, 2003 7:49 AM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: [PHP-DB] Don't know why query works this way
there are many ways to approach this.
one is, select the db before any of this activity with mysql_select_db
("dbname") then you can run as many queries against this database as you
want.
Until you call that function again with another db name, mysql with
_always_ run against that database.
hth
jd
Michael Cortes
<[EMAIL PROTECTED] To:
[EMAIL PROTECTED]
euf.net> cc:
Subject: [PHP-DB] Don't
know why query works this way
08/05/2003 11:35
PM
Please respond to
cortesm
I have been writing my queries like this.......
$link = mysql_connect ($host, $username, $password);
$query = "insert into $table ('joe', 15)";
if ( mysql_db_query($dbname, $query, $link)) { }
But then I was reading that I should use mysl_query instead of
mysql_db_query.
But I was having a problem with where do i put the $dbname.
When I used:
mysql_query ($dbname, $query, $link)
I got an error message saying i had too many arguments. So I changed it
to:
mysql_query ($query, $link)
I then got an error message saying it didn't know what database I was
connected to. I finally got around the problem by including the
database
name in the query, like so:
$query = "insert into $dbname.$table ('joe', 15)";
I shouldn't have to say, but this is a simplified example. I didn't
want
to
include all the fields, tables, values that the true example has. The
question is, am I doing this right? Do I have no choice but to retype
the
$dbname all over the place if I want to use "mysql_query"?
Thank in advance for any help.
--
Michael Cortes
Fort LeBoeuf School District
34 East Ninth Street
PO Box 810
Waterford PA 16441-0810
814.796.4795
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