how to Read 10000+ bytes[] of binary data from DataBase? - php

Question

I have one table that contains Company's Logo.... whenever I read small image like 4096 bytes It works perfectly, but i am not able to read over the 10000 bytes in php.
it's read only 4096 bytes from database
Update:
Column Lenth in Sql :
My Code in Model
function GetLogoById($Id)
{
$this->load->database();
mssql_query("SET TEXTSIZE 2147483647");
// or use CI's active record
$this->db->query("SET TEXTSIZE 2147483647");
$query = $this->db->query( "EXEC GetLogoById '$Id'" );
$result = array();
foreach ($query->result() as $row)
{
$result[] = array("Logo"=> $row->Logo);
}
return $result;
}
My Controller Code :
public function GetLogoById()
{
parse_str($_SERVER['QUERY_STRING'],$_GET);
$Id = $_GET['Id'];
$this->load->model('MyModel');
$result = $this->MyModel->GetLogoById($Id);
header('Content-type: image/png');
echo $result[0]['Logo'];
}
I am Getting Only 4096 bytes like :(string:4096) ����
I am getting this error on browser :

Answer 1

I think this is a problem with using MSSQL where data stored in a text type column is truncated for no apparent reason after 4096 characters.
Increase the maximum size of a text column to be returned from SQL Server. You can do this with the following SQL query:
SET TEXTSIZE 2147483647
You can run this with the following PHP, run it right after you make the connection:
mssql_query("SET TEXTSIZE 2147483647");
// or use CI's active record
$this->db->query("SET TEXTSIZE 2147483647");
And another way way to work around the issue is to change the "textlimit" and "textsize" settings within php.ini, like the following:
mssql.textlimit = 2147483647
mssql.textsize = 2147483647
Refer to this SO answer Why TEXT column returns only 4096 bytes? which refers to SQL Server, PHP and Truncating Text.
Update: Upon further review, reading this PHP bug, you may want to try using PDO_ODBC to connect to MSSQL Server instead:
//$dsn = 'mssql:host=MYBOX;dbname=testdb';
$dsn = 'odbc:DRIVER={SQL Server};SERVER=MYBOX;DATABASE=testdb;';
Also try setting the TEXTSIZE to megabytes:
$sql = "SET TEXTSIZE 3145728"; // 3 Megabytes
mssql_query($sql, $db) or die(mssql_get_last_message());

Answer 2

Got solution with sqlsrv driver ;)
function GetLogoById($Id)
{
$serverName = "XXXXX";
$uid = "XXXXXX";
$pwd = "XXXXXX";
$connectionInfo = array( "UID"=>$uid,
"PWD"=>$pwd,
"Database"=>"XXXXXX");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
$tsql = "select Logo from TableName where Id = '$Id'";
$stmt = sqlsrv_query( $conn, $tsql);
if( $stmt === false)
{
echo "Error in query preparation/execution.\n";
die( print_r( sqlsrv_errors(), true));
}
/* Retrieve each row as an associative array and display the results.*/
while( $row = sqlsrv_fetch_array( $stmt, SQLSRV_FETCH_ASSOC))
{
return $row;
}
/* Free statement and connection resources. */
sqlsrv_free_stmt( $stmt);
sqlsrv_close( $conn);
}

Answer 3

First. don't use the DBMS to store images. trust me.
Second, don't use the DMBS to store the images.....
Now, if you are getting an $id from the model, why have looping code to return an array? kind of defeats the purpose of an id?
I assume that the logo data is stored in the form of a BLOB ?
If this is the case the model could be something like:
$query = $this->db->get_where('tablename',array('id' => $id));
if ($query->num_rows() == 1)
{
return $query->first_row()->logo
}
else
{
return FALSE;
}
then the controller code could be something like:
public function GetLogoById($id)
{
$this->load->model('MyModel');
if($logo = $this->MyModel->GetLogoById($id))
{
$this->output->set_content_type('image/png');
$this->output->set_output($logo);
}
}