Aug 19, 2011

PHP : Handling file uploads - easy tutorial with example

Handling file uploads with PHP is very easy task and here you will learn how to do it. And because I believe that people learn best with examples lets start with this.
Now lets upload one file to some user directory on a server. Lets create file upload_form.php on our server. It will contain mainly html code:

<form enctype="multipart/form-data" action="upload.php" method="POST">

    File: <input name="ourfile" type="file" />
    <button type="submit">Upload</button>


Its very simple file with only one form. Don’t forget to add enctype="multipart/form-data" to your form when its used for file uploads. In this form we have to fields - the first is our file and the second is the submit button.
Now we need another file upload.php. Here is its content

$dir = '/var/www/files/';

$destinationfile = $dir . basename($_FILES['ourfile']['name']);

if (move_uploaded_file($_FILES['ourfile']['tmp_name'], $destinationfile)) {

   echo "Upload successful!";
} else {
   echo "File attack!\n";


Here we have destination directory for our uploads - $dir = '/var/www/files/'. Our file will be saved in this directory and will have the name of the uploaded file.
The function move_uploaded_file checks if the file (first parameter) is a valid uploaded file and if its valid it moves it to $destinationfile. If you just want to check the file without moving it use is_uploaded_file instead.
And that’s all. Now if you have done everything the right way you must see “Upload successful!” when you use upload_file.php and upload file.

The original of this tutorial is here

Aug 16, 2011

PHP: Playing with StdClass

What is StdClass and where does it live?

StdClass is a document class in PHP with no predefined members. Its the class that is created when you cast something to object like this:

$obj = (object) $something;

Sounds good but how to get its members if we don’t know about them? Actually, its very easy and we have several approaches.

First, we can iterate through its members with foreach:
foreach ($obj as $key => $value) {
Second we can cast our object to array:

$array = (array) $obj;

Or get its members as array:


What else we can do with StdClass?
We can create objects and assign members:
$std = new StdClass();
$std->key = "value";
and access them:
echo $std->key;
If you see an error like this:
Catchable fatal error: Object of class stdClass could not be converted to string
the culprit is our stdClass of course. Maybe you are trying to print an object of this class.

Read how to use SOAP with PHP

Aug 11, 2011

How to use SOAP with PHP - very simple tutorial and example

Using SOAP with PHP can be very easy if you do everything right. First your PHP must be configured with --enable-soap. With Windows and WAMP you only need to check PHP > PHP extensions -> php_soap. You can read more about the configuration here but most likely you don’t need to do anything else.

$client = new SoapClient("http://localhost/SomeSoap.wsdl");
$something = $client->SomeFunction();

And that’s all.
If you get Fatal error: Uncaught SoapFault exception: [HTTP] Could not connect to host in the row of
$something = $client->SomeFunction();
your problem may be in your soap configuration or something like this.

How to stop Skype from using port 80

Its very annoying when you want to use port 80 with apache for example and you must stop Skype, start the service and start Skype again.
Also its annoying when you install WAMP Server and its not working or at least apache is not working because Skype is on port 80 and you’ve totally forgotten about it. If you are little absent minded like me, you may spend even few hours looking for the problem and installing WAMP again.

Open Skype, select Tools from the menu, then Options, go to Advanced Settings and then Connection. There is a checkbox with the text
Use port 80 and 443 as alternatives for incoming connections
Uncheck it and hit Save. That’s it. You may need to restart Skype for the changes to take effect. I hope that this will help you.

PHP - Fatal error: Uncaught SoapFault exception: [HTTP] Could not connect to host in …

I receive this nasty error yesterday and it took me some time to figure out the problem. This line passes without any problems

$client = new SoapClient($url);

and this


shows the function prototypes correctly. So it connects and gets the data but when I try to call a function I receive this error

Fatal error: Uncaught SoapFault exception: [HTTP] Could not connect to host in MyFile.php:23 Stack trace: #0 [internal function]: SoapClient->__doRequest('__call('myFunction', Array) #2 …

I made fast research and found that people receive this error when their php installation isn’t right or because they are trying to use it with https without the openSSL extension. So you can receive this problem with various situations. Anyway my code was right so I took a look at the service description that I received from the server and there was the problem. The server wasn’t configured right

<service name='myService'>
  <soap:address location='http://some_other_url'/>

It was configured to send invalid url and the function calls were using that invalid url. So there are two solutions - one correct and one that is almost correct but it works for testing purposes when you wait for people to fix their server. So the first is to configure the server correctly. The other is to give __doReguest the correct location.
I hope this will help somebody because founding the problem was very frustrating for me.

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