<?php
ob_start(); 
session_start();
              
  if(isset($_POST['sent'])){      
    $novinka="marek";
	$id=$_POST['id'];
	
    if($novinka==""){ // pokud nebylo vyplneno neco z toho, co je povinné, dáme vedet a skript ukoncíme
      $backlink="index.php?page=logo&Alert=1";
    }else{              // povinné udaje vyplneny vsechny
      require "db.php";     // pripojime se k databazi
      $PocetStejnych=mysql_result(mysql_query("SELECT COUNT(*) FROM `zakaznici` WHERE `mail`='$dmail'"), 0);
	  if($PocetStejnych!=0){    // pokud v db je jiz takove jmeno nebo heslo...
        $backlink="index.php?page=logo&Alert=2";
      }else{            // vlozime tedy data do databaze






//define a maxim size for the uploaded images in Kb
 define ("MAX_SIZE","100"); 

//This function reads the extension of the file. It is used to determine if the file  is an image by checking the extension.
 function getExtension($str) {
         $i = strrpos($str,".");
         if (!$i) { return ""; }
         $l = strlen($str) - $i;
         $ext = substr($str,$i+1,$l);
         return $ext;
 }

//This variable is used as a flag. The value is initialized with 0 (meaning no error  found)  
//and it will be changed to 1 if an errro occures.  
//If the error occures the file will not be uploaded.
 $errors=0;
//checks if the form has been submitted
 if(isset($_POST['Submit'])) 
 {
 	//reads the name of the file the user submitted for uploading
 	$image=$_FILES['image']['name'];
 	//if it is not empty
 	if ($image) 
 	{
 	//get the original name of the file from the clients machine
 		$filename = stripslashes($_FILES['image']['name']);
 	//get the extension of the file in a lower case format
  		$extension = getExtension($filename);
 		$extension = strtolower($extension);
 	//if it is not a known extension, we will suppose it is an error and will not  upload the file,  
	//otherwise we will do more tests
 if (($extension != "jpg") && ($extension != "jpeg") && ($extension != "png") && ($extension != "gif")) 
 		{
		//print error message
 			$errors=1;
 		}
 		else
 		{
//get the size of the image in bytes
 //$_FILES['image']['tmp_name'] is the temporary filename of the file
 //in which the uploaded file was stored on the server
 $size=filesize($_FILES['image']['tmp_name']);

//compare the size with the maxim size we defined and print error if bigger
if ($size > MAX_SIZE*1024)
{

	$errors=1;
}
$obr="logo";
//we will give an unique name, for example the time in unix time format
$image_name=$obr.'.'.$extension;
//the new name will be containing the full path where will be stored (images folder)
$newname="../images/".$image_name;
//we verify if the image has been uploaded, and print error instead 
move_uploaded_file($_FILES['image']['tmp_name'], $newname);

}}}





		
        $backlink="index.php?page=logo"; // presmerovani s hlaskou ze je vse OK
      }

    }
  }else{
    $backlink="index.php?page=logo&Alert=5";
  }
// pokud pouzijete HEADER LOCATION tak by pred nim nemelo byt zadne platne ECHO
//echo "<a href='index.php'>index</a>";
// samozrejme zde muze byt presmerovani na jinou stranku pomoci
 header ("Location: $backlink");
ob_end_flush();

?>