class DB
{
var $Host = C_DB_HOST; // Hostname of our MySQL server
var $Database = C_DB_NAME; // Logical database name on that server
var $User = C_DB_USER; // Database user
var $Password = C_DB_PASS; // Database user's password
var $UseODBCCursor = 0;
var $Link_ID = 0; // Result of mysql_connect()
var $Query_ID = 0; // Result of most recent mysql_query()
var $Record = array(); // Current mysql_fetch_array()-result
var $Row = 0; // Current row number
var $Errno = 0; // Error state of query
var $Error = "";
var $Auto_Free = 1; ## set this to 1 to automatically free results, 0 else
function halt($msg)
{
printf("Database error: %s
\n", $msg);
printf("ODBC Error: %s (%s)
\n",
$this->Errno,
$this->Error);
die("Session halted.");
}
function connect()
{
if (0 == $this->Link_ID)
{
$this->Link_ID = odbc_connect($this->Database, $this->User, $this->Password, $this->UseODBCCursor);
if (!$this->Link_ID)
{
$this->halt("Link-ID == false, connect failed");
}
}
}
function query($Query_String)
{
// remove the 'LIMIT' clause from the query
$pos = strpos($Query_String, " LIMIT ");
if ($pos) $Query_String = substr($Query_String, 0, $pos);
unset($pos);
$this->connect();
# printf("
Debug: query = %s
\n", $Query_String);
# rei@netone.com.br suggested that we use this instead of the odbc_exec().
# He is on NT, connecting to a Unix MySQL server with ODBC. -- KK
# $this->Query_ID = odbc_prepare($this->Link_ID,$Query_String);
# $this->Query_Ok = odbc_execute($this->Query_ID);
$this->Query_ID = odbc_exec($this->Link_ID,$Query_String);
$this->Row = 0;
odbc_binmode($this->Query_ID, 1);
odbc_longreadlen($this->Query_ID, 4096);
if (!$this->Query_ID)
{
$this->Errno = 1;
$this->Error = "General Error (The ODBC interface cannot return detailed error messages).";
$this->halt("Invalid SQL: ".$Query_String);
}
return $this->Query_ID;
}
function next_record()
{
$this->Record = array();
$this->$stat = odbc_fetch_into($this->Query_ID, ++$this->Row, &$this->Record);
if (!$this->$stat)
{
if ($this->Auto_Free)
{
odbc_free_result($this->Query_ID);
$this->Query_ID = 0;
};
}
else
{
// add to Record[]
$count = odbc_num_fields($this->Query_ID);
for ($i=1; $i<=$count; $i++)
$this->Record[strtolower(odbc_field_name ($this->Query_ID, $i)) ] = $this->Record[ $i - 1 ];
}
return $this->Record;
}
function seek($pos)
{
$this->Row = $pos;
}
function metadata($table)
{
$count = 0;
$id = 0;
$res = array();
$this->connect();
$id = odbc_exec($this->Link_ID, "select * from $table");
if (!$id)
{
$this->Errno = 1;
$this->Error = "General Error (The ODBC interface cannot return detailed error messages).";
$this->halt("Metadata query failed.");
}
$count = odbc_num_fields($id);
for ($i=1; $i<=$count; $i++)
{
$res[$i]["table"] = $table;
$name = odbc_field_name ($id, $i);
$res[$i]["name"] = $name;
$res[$i]["type"] = odbc_field_type ($id, $name);
$res[$i]["len"] = 0; // can we determine the width of this column?
$res[$i]["flags"] = ""; // any optional flags to report?
}
odbc_free_result($id);
return $res;
}
function num_rows()
{
# Many ODBC drivers don't support odbc_num_rows() on SELECT statements.
$num_rows = odbc_num_rows($this->Query_ID);
//printf ($num_rows."
");
# This is a workaround. It is intended to be ugly.
if ($num_rows < 0)
{
$i=10;
while (odbc_fetch_row($this->Query_ID, $i)) $i*=10;
$j=0;
while ($i!=$j)
{
$k= $j+intval(($i-$j)/2);
if (odbc_fetch_row($this->Query_ID, $k))
$j=$k;
else
$i=$k;
if (($i-$j)==1)
{
if (odbc_fetch_row($this->Query_ID, $i))
$j=$i;
else
$i=$j;
};
//printf("$i $j $k
");
};
$num_rows=$i;
}
return $num_rows;
}
function num_fields()
{
return count($this->Record)/2;
}
function field_value($Field_Name)
{
return $this->Record[strtolower($Field_Name)];
}
function f($Field_Name)
{
return $this->Record[strtolower($Field_Name)];
}
function affected_rows()
{
return odbc_num_rows($this->Query_ID);
}
function optimize($tbl_name)
{
// TODO...
return false;
}
function clean_results()
{
if($this->Query_ID != 0) odbc_freeresult($this->Query_ID);
}
function close()
{
if($this->Link_ID != 0) odbc_close($this->Link_ID);
}
}
?>