In the course of a master's thesis I developed an ontology which I imported into Ontotext GraphDB. At this point I need to connect a website (HTML / PHP) with the ontology I imported into Ontotext GraphBD. My technical knowledge is not high so I wondered if it is possible to connect these two components and if yes how can I do it?
I have on one side a website and on the other an ontology in GraphDB. Now I need that in this website it is possible for example to do CRUD operations so that these operations are also done in the ontology that is in Ontotext GraphDB.
Example: Consult through my website all the individuals present in the ontology.
I in the Ontotext GraphDB workbench through the Sparql queries I get these operations, but I want to do it through the website that I'm doing in HTML, PHP and CSS.
Thanks for your attention.
Best regards
I think I solved my problem with this here.
In general, you need to download Semsol's ARC2 library.
Then you create the php file with a structure like this:
<?php
/* ARC2 static class inclusion */
include_once('semsol/ARC2.php');
$dbpconfig = array(
"remote_store_endpoint" => "http://dbpedia.org/sparql",
);
$store = ARC2::getRemoteStore($dbpconfig);
if ($errs = $store->getErrors()) {
echo "<h1>getRemoteSotre error<h1>" ;
}
$query = '...';
/* execute the query */
$rows = $store->query($query, 'rows');
if ($errs = $store->getErrors()) {
echo "Query errors" ;
print_r($errs);
}
/* display the results in an HTML table */
echo "..."
?>
I thank everyone who tried to help me.
You need to somehow query your GraphDB from your PHP application using a remote sparql service. If this is what you want, in java, this can be easily done using Jena QueryExecutionFactory.sparqlService method.
However, a simple googling for PHP results in A PHP forward proxy for remote access to SPARQL endpoints. Where you can send queries and receive results from a SPARQL endpoint, I guess this is what you actually need.
Furthermore, this link gives you multiple options for SPARQL implementations including some php ones.
Related
I'm new to this and I know I'm probably doing this entire thing the wrong way, but I've been at it all day trying to figure it out. I'm realizing there's a big difference between programming a real project of my own rather than just practicing small syntax-code online. So, I lack the experience on how to merge/pass different variables/scopes together. Understanding how to fit everything within the bigger picture is a completely different story for me. Thanks in advance.
What I'm trying to do, is to make the function "selectyacht" output data in a different location from where it's being called (in viewship.php). The output data (in viewship.php) needs to be only certain fields (not everything) returned and those results will be scattered all over the html page (not in a table). In addition to that, I have this variable: "$sqlstatement" (in sqlconn.php) that I'm trying to bring outside the function because I don't want to repeat the connection function every time. I tried a global variable, as much as I shouldn't, and it thankfully it gave me an error, which means I have to find a better way.
Basically my struggle is in understanding how I should structure this entire thing based on two factors:
To allow the second conditional statement in sqlconn.php to be typed
as least often as possible for different "selectyacht" functions
that will come in the future.
To allow the connection instance in sqlconn.php to reside outside the function since it will be used many times for different functions.
Returning data in a different place from where it's being called in viewship.php because the call will be a button press, not the results to be shown.
This is probably very simple, but yet it eludes me.
P.S. Some of this code is a copy/paste from other resources on the internet that I'm trying to merge with my own needs.
sqlconn.php
<?php
$servername = "XXXXXXXX";
$username = "XXXXXXXX";
$password = "XXXXXXXX";
$dbname = "XXXXXXXX";
// Instantiate the connection object
$dbconn = new mysqli($servername, $username, $password, $dbname);
// Check if the connection works or show an error
if ($dbconn->connect_error) {
die("Connection failed: " . $dbconn->connect_error);
}
// Create a query based on the ship's name
function selectyacht($shipname) {
global $sqlstatement;
$sqlstatement = "SELECT * FROM ships WHERE Name=" . "'" . $shipname . "'";
}
// Put the sql statement inside the connection.
// Additional sql statements will be added in the future somehow from other functions
$query = $dbconn->query($sqlstatement);
// Return the data from the ship to be repeated as less as possible for each future function
if ($query->field_count > 0) {
while($data = $query->fetch_assoc()) {
return $data;
}
}
else {
echo "No data found";
}
// Close the connection
$dbconn->close();
?>
viewship.php
<html>
<body>
<?php include 'sqlconn.php';?>
<!-- ship being selected from different buttons -->
<?php selectyacht("Pelorus");?>
<br>
<!-- This is the output result -->
<?php echo $data["Designer"];?>
<?php echo $data["Length"];?>
<?php echo $data["Beam"];?>
<?php echo $data["Height"];?>
</body>
</html>
Mate, I am not sure if I can cover whole PHP coding standards in one answer but I will try to at least direct you.
First of all you need to learn about classes and object oriented programming. The subject itself could be a book but what you should research is autoloading which basically allows you to put your functions code in different files and let server to include these files when you call function used in one of these files. This way you will be able to split code responsible for database connection and for performing data operations (fetching/updating/deleting).
Second, drop mysqli and move to PDO (or even better to DBAL when you discover what Composer is). I know that Internet is full of examples based on mysqli but this method is just on it's way out and it is not coming back.
Next, use prepared statements - it's a security thing (read about SQL injection). Never, ever put external variables into query like this:
"SELECT * FROM ships WHERE Name=" . "'" . $shipname . "'";
Anyone with mean intentions is able to put there string which will modify your query to do whatever he wants eg. erase your database completely. Using prepared statements in PDO your query would look like this:
$stmt = $this->pdo->prepare("SELECT * FROM ships WHERE Name = :ship_name");
$stmt->bindValue(':ship_name', $shipname);
Now to your structure - you should have DB class responsible only for database connection and Ships class where you would have your functions responsible eg. for fetching data. Than you would pass (inject) database connection as an argument to class containing you selectYacht function.
Look here for details how implementation looks like: Singleton alternative for PHP PDO
For
'Returning data in a different place from where it's being called'
If I understand you correctly you would like to have some field to input ship name and button to show its details after clicking into it. You have 2 options here:
standard form - you just create standard html form and submit it with button click redirecting it to itself (or other page). In file where you would like to show results you just use function selectYacht getting ship name from POST and passing it to function selectYacht and then just printing it's results (field by field in places you need them)
AJAX form - if you prefer doing it without reloading original page - sending field value representing ship name via AJAX to other page where you use selectYacht function and update page with Java Script
I have connected my php web app to mongodb with the help of simplemongophp library. Now what I want is ..the operations like read or update should perform without specifying the database name explicitly and all the crud operations should be in the form of functions.
here is a piece of code i have tried
include ('Db.php');
include ('Dbo.php');
// i dont want to specify the db name explicitly
Db::addConnection(new Mongo(),'two');
function non(){
echo "$this->name is . \n";
}
Dbo::addClass('php','gfyhfh');
Db::batchInsert('gfyhfh',array(
array('name'=>'bjhghgjh','hobbies'=>'distin')));
static function insertion()
{
Db::batchInsert('gfyhfh',array(
array('flower'=>'rose')));
}
?>
This is showing error .so can anyone tell me how do i do it.Thankyou
If you don't tell MongoDB what database it needs then how does it know what database to write to? This goes for SQL techs as well.
There is currently no way of connecting to MongoDB without specifying a database name.
I have a task to convert the standalone PHP files to Magento's MVC. These PHP files were created by another developer. The code in the PHP file accesses the database, converts the result into JSONP format and forward it to the frontend developer.
I don't have any knowledge of Magento's MVC. Is this task of conversion similar to the modules in the app/code/core/Mage in the Magento folder?? How can I do this? Is the magento MVC the same as the PHP MVC?
I am including the php file that I need to convert to Magento MVC. So it will be easier for you to understand..
<?php header('content-type: application/json; charset=utf-8');
$link = mysqli_connect("localhost", "db_username", "password", "db_dbname");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$pid = $_REQUEST['prodid'];
/* Select queries return a resultset */
$result = mysqli_query($link, "SELECT round(rating_summary / 20) AS search_rating FROM review_entity_summary where store_id = 1 and entity_pk_value=" . $pid);
// printf("Select returned %d rows.\n" . "<br>\n", mysqli_num_rows($result)) . "<br>\n";
//$string = $_REQUEST['varname'];
$rows = array();
/* while ($row = $result->fetch_row()) {
printf("%s\n", $row[0]);
}*/
//while($r = mysql_fetch_assoc($result)) {
while ($r = mysqli_fetch_assoc($result)) {
$rows = $r;
//print_r ($rows) . "<br>\n";
}
$json_data = json_encode($rows);
print_r ($json_data);
/* free result set */
// mysqli_free_result($result)
mysqli_close($link);
?>
So how can I convert this file to Magento's MVC style?? IS this necessary to convert this file to magento MVC?
I think what they are asking you to do, is to convert code that look like
require_once 'path/to/magento'. "/Mage.php";
umask(0);
Mage::app("default");
....
In to Magento MVC (module)
\app\code\local\MyNamespace
If you're new to OOP, take a look here: http://www.php.net/manual/en/language.namespaces.rationale.php
\app\code\local\MyNamespace\Appname
Name of new custom module - try to keep at least first letter capital, or there WILL BE truble with Magento's understanding
\app\code\local\MyNamespace\Appname\Block
In classic MVC architecture, this represents View part of MVC
\app\code\local\MyNamespace\Appname\controllers
This is fairly easy to understand, if not, have fun: http://en.wikipedia.org/wiki/Model%E2%80%93View%E2%80%93Controller
\app\code\local\MyNamespace\Appname \etc
Contains the most significant part in Magento's MVC architecture - the xml field that will connect all things together
\app\code\local\MyNamespace\Appname\Helper
Intended for files that contain repeatable routines or simple procedural methods
\app\code\local\MyNamespace\Appname\Model
Same thing as for controller, take a look at the link above
\app\code\local\MyNamespace\Appname\sql
This was interesting thing to find out what's it for, it's to define custom database tables and process any upgrades to your extension.
\etc\modules
Contains all Modules included in Magento - here's where it all really begins for our module
see http://inchoo.net/ecommerce/magento/basic-folder-structure-for-new-magento-module/
Interesting question. IMHO, you are in the position I was with regard to Magento some time ago. To write and use mySql queries against the Magento database requires nothing from the MVC model. In our world, I call these voodoo files. I create tools for my staff with very specific purpose and non-published URLs. You can put them anywhere in the file system, just make sure that the directory name and file name do not have any magic meaning within Magento or you might inadvertently disable some function. My sales tax reporting tool is exactly like yours, where you open a connection to the mySql database and make direct, manual queries against it.
RS's answer is a great primer for getting into the MVC. I have started using it for my voodoo tools as well. Making queries the "Magento way" via their controllers can make getting information out of the EAV much easier than trying to put together the info via manual queries because the infrastructure is already coded for you. An example is customer information! I figured out sales tax queries (which was no minor undertaking), but getting a complete name, address, and email was absurd.
I created an export tool which outputs JSON data. I then CURL it from the server at work to store the sales into a mysql database. From there, they get imported into quickbooks. This order export tool is 100% Magento objects like from the example below.
Here is the code I used in my voodoo customer info tool:
// this limits access to the page to this IP address, perhaps your office?
$remote_host_ip='198.75.43.24';
if( $_SERVER['REMOTE_ADDR'] != $remote_host_ip ){
$error[ date("Y-m-d_H:i:s") ]="\$_SERVER['REMOTE_ADDR'] is ".$_SERVER['REMOTE_ADDR']." which is not the office ip! $remote_host_ip\n";
}
// from: http://fishpig.co.uk/blog/direct-sql-queries-magento.html
require_once '/home/(your host username)/public_html/app/Mage.php';
// from: http://stackoverflow.com/questions/7145373/magento-fatal-error-call-to-a-member-function-getmodelinstance-on-a-non-obje/7145570#7145570
Mage::app()->setCurrentStore(Mage_Core_Model_App::ADMIN_STORE_ID);
$userModel = Mage::getModel('admin/user');
$userModel->setUserId(0);
// from: http://www.magentocommerce.com/boards/viewthread/297092/
$_dealers = Mage::getModel('customer/customer')
->getCollection()
->addFieldToFilter('group_id', array(6,5,3))
// ->addFieldToFilter('group_id', 6)
;
// print_r($_dealers);
$dealers=Array();
foreach( $_dealers as $id => $obj){
// $info=$obj->load();
// print_r($info);
// from: http://www.42droids.co.uk/magento-get-customer-and-address-details
$customerAddressId=$obj->getDefaultBilling();
$address = Mage::getModel('customer/address')->load($customerAddressId);
$_addr=$address->format();
$addr.=",".$address->telephone;
$addr.=",".$obj->email;
echo "$addr\n"; //var_dump($addr);
}
I do most of my learning by google, trial, and error; so please consider that "my way" is simply one that works for me and probably still isn't the best or easiest way. Also, I still don't completely understand how some of the objects work, hence debug output that's commented out.
My advice would be to not try too hard to make something for the "frontend" facing the customer. Getting pages to display and work correctly in Magento is a miserable experience. If you're able to do sneaky hidden voodoo tools, try to do that. If you're forced to make a module, there are a couple dozen step by step how-to's on the net that can guide you.
I have, what I would think, would be a very easy conversion....I have a database that has 1 table with 4 fields....I query the table to fill the webpage....I need to convert this PHP to .aspx I've looked and it seems that most of what I find is much more advanced than i need. I know NOTHING about asp. Thank you very much. Here is what I have:
<?php
include("config.php");
$result = mysql_query("SELECT * FROM TestMeas ORDER BY name ASC",$connect);
while($myrow = mysql_fetch_array($result))
{
?>
<?php
echo "".$myrow['name']. ""; ?>
<?php echo $myrow['desc'];
}
?>
For starters, there is a big difference between ASP and ASP.net. In very simple terms, ASP is a scripting language whereas ASP.net is an application framework. Since ASP and PHP are both scripting languages, the usage is fairly similar. ASP.net is a whole different beast with almost no similarity.
Given the differences between working in a scripting language and working within the structure of the .Net framework, it's difficult to say "just do XYZ to convert your PHP to .Net". The .Net framework is largely built around separating presentation from content, which is not a focus in PHP unless you use a framework like CakePHP or CodeIgniter (or others).
Hopefully the linked tutorial in the comments got you on your way. There is also an MSDN article with a simple example of connecting to SQL Server.
Since this appears to be a "one-off" favor for a friend, your simplest option is probably to build a string in the code and pass it to your view.
string output = "";
using ( SqlConnection conn = new SqlConnection( connectionString ) )
{
conn.Open();
using( SqlCommand command = new SqlCommand( "SELECT url, name FROM TestMeas ORDER BY name ASC",
conn ) )
{
using( SqlDataReader reader = command.ExecuteReader() )
{
if( reader.HasRows )
{
while ( reader.Read() )
{
output += String.Format( "{1}",
reader[ 0 ],
reader[ 1 ] );
}
}
reader.Close();
}
}
conn.Close();
}
// Do something with output
You could do this in a code-behind, you could do it in a Controller if you're using MVC, you could do it right in the form/view/page if you want.
I have the website written in PHP (Kohana) and MySQL. I want to create the installer which would run all the environment tests and, what is the most important (and the most misterious) for me, will deploy the database. What is more, I would like to choose the prefix of the tables in the database and specify the username and password for the admin. Would you please give my some hints how to do it? Or some link to some tutorial? I was trying to google that but when I searched for terms like "PHP website installer" I have found only how to install PHP.
The most important for me is the process of deploying database with user-defined tables prefix. How should I store the database structure in the file. Should I name the tables using some keyword for the prefix, for example:
%%prefix%%_tableName
or
__prefix__tableName
And what then? Change all the keywords using regular expresions? Is it correct way or is it any better?
A simple way would be to store the SQL queries in PHP files and have PHP inject the prefix into the SQL and return the string.
Like, if you had a PHP file like this for each of your CREATE TABLE queries:
<?php
/** get_myTable.php **/
return <<<SQL
CREATE TABLE `{$prefix}myTable` ( ... )
SQL;
?>
You could do this in your main code:
<?php
$prefix = 'dbprefix_';
$create_queries = array();
$create_queries[] = include('get_myTable.php');
$create_queries[] = include('get_otherTable.php');
foreach($create_queries as $_query) {
mysql_query($_query) or trigger_error(mysql_error(), E_USER_WARNING);
}
?>
Wordpress has its famous '5-minute install'. It's a great benchmark for simplicity, usability, and power and it does most, if not all, of the things you outlined in your question.