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Posted by Charles Kline on 09/28/05 00:46
On Sep 27, 2005, at 5:23 PM, M. Sokolewicz wrote:
> Charles Kline wrote:
>
>
>> On Sep 27, 2005, at 3:42 PM, Andy Pieters wrote:
>>
>>> Hi
>>>
>>> Without you actually showing us these class files we can only
>>> guess but a
>>> common mistake is this:
>>>
>>> mysql_open(connection details)
>>> mysql_query(query)
>>>
>>> In those cases the last opened handle is used. To prevent this,
>>> use this
>>> syntax
>>>
>>> $db1=mysql_open(connection for db1);
>>> $db2=mysql_open(connection for db2);
>>>
>>> mysql_query($db1,$query_db_1);
>>> mysql_query($db2,$query_db_2);
>>>
>>> If you have used this syntax then check your class if it is using
>>> a global
>>> variable to hold the database handle and if it does make it a
>>> class variable
>>> instead
>>>
>>> Instead of
>>>
>>> $db=null
>>>
>>> class db
>>> {function db()
>>> {$GLOBALS['db']=mysql_open(...
>>>
>>> do instead
>>>
>>> class db
>>> {var $db=null;
>>> function db()
>>> {$this->db=mysql_open
>>>
>>> That way you can instanciate as many instances of the class as
>>> you like and
>>> each will have its own database handle.
>>>
>>> HTH
>>>
>>>
>>> Andy
>>>
>>>
>>>
>> What I have is more like this:
>> class db {
>> var $dbpath = "localhost";
>> var $dbname = "testdb";
>> var $dblogin = "test";
>> var $dbpass = "test";
>> function db() {
>> $link = mysql_connect($this->dbpath, $this->dblogin, $this-
>> >dbpass) or die ('Not Connected: ' . mysql_error());
>> mysql_select_db($this->dbname, $link) or die ('Can\'t use
>> this database: ' . mysql_error());
>> }
>> function retrieveData( $sql ) {
>> $rs = mysql_query( $sql ) or die("Invalid query: " .
>> mysql_error ());
>> // if no result, return null
>> if (($rs == null) || (mysql_num_rows($rs) == 0)) {
>> return null;
>> } else {
>> return ( $rs );
>> }
>> }
>> function insertData( $sql ) {
>> mysql_query( $sql );
>> // return new id if insert is successful
>> if ( mysql_affected_rows() > 0 ) {
>> return ( mysql_insert_id() );
>> } else {
>> return null;
>> }
>> }
>> function updateData( $sql ) {
>> $rs = mysql_query( $sql );
>> if (mysql_affected_rows() > 0) {
>> return ( $rs );
>> } else {
>> return null; // no changes were made
>> }
>> }
>> }
>> I then have another class with a different name and I changed the
>> names of the functions as well. I have another set of class files
>> that contain my various queries etc.
>> Thanks for any help.
>> Charles
>>
> that's where it's going wrong. You're not linking db::db()'s link
> in the db::insertData() mysql_query() function. Thus, the
> mysql_query function defaults to the "last opened mysql connection"
> regardless of object. A way to fix this is to store the link in
> $this->link instead, and changing your mysql_query()'s to
> mysql_query($sql, $this->link);
> same goes for your mysql_affected_rows() and mysql_insert_id()
> functions
>
> -tul
>
Hmm... still getting the same results. Here is my modified class files:
class db {
// database setup. These should be changed accordingly.
var $dbpath = "localhost";
var $dbname = "blah1";
var $dblogin = "test";
var $dbpass = "test";
function db() {
$this->link = mysql_connect($this->dbpath, $this->dblogin, $this-
>dbpass) or die ('Not Connected: ' . mysql_error());
mysql_select_db($this->dbname, $this->link) or die ('Can\'t use
this database: ' . mysql_error());
}
function retrieveData( $sql ) {
$rs = mysql_query( $sql,$this->link ) or die("Invalid query: " .
mysql_error());
// if no result, return null
if (($rs == null) || (mysql_num_rows($rs) == 0)) {
return null;
} else {
return ( $rs );
}
}
function insertData( $sql ) {
mysql_query( $sql,$this->link );
// return new complaint id if insert is successful
if ( mysql_affected_rows($this->link) > 0 ) {
return ( mysql_insert_id($this->link) );
} else {
return null;
}
}
function updateData( $sql ) {
$rs = mysql_query( $sql,$this->link );
if (mysql_affected_rows($this->link) > 0) {
return ( $rs );
} else {
return null; // no changes were made
}
}
}
and stored in another file...
class db2 {
// database setup. These should be changed accordingly.
var $dbpath = "localhost";
var $dbname = "blah2";
var $dblogin = "test";
var $dbpass = "test";
function dbzen() {
$this->link = mysql_pconnect($this->dbpath, $this->dblogin,
$this->dbpass) or die ('Not Connected: ' . mysql_error());
mysql_select_db($this->dbname, $this->link) or die ('Can\'t use
this database: ' . mysql_error());
}
function retrieveZenData( $sql ) {
$rs = mysql_query( $sql,$this->link ) or die("Invalid query: " .
mysql_error());
// if no result, return null
if (($rs == null) || (mysql_num_rows($rs) == 0)) {
return null;
} else {
return ( $rs );
}
}
function insertZenData( $sql ) {
mysql_query( $sql,$this->link ) or die("Invalid query: " .
mysql_error());
// return new complaint id if insert is successful
if ( mysql_affected_rows($this->link) > 0 ) {
return ( mysql_insert_id($this->link) );
} else {
return null;
}
}
function updateZenData( $sql ) {
$rs = mysql_query( $sql,$this->link );
if (mysql_affected_rows($this->link) > 0) {
return ( $rs );
} else {
return null; // no changes were made
}
}
}
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