first commit

validation/func_validEmail.php

@@ -0,0 +1,67 @@
+<?php
+function validEmail($email)
+{
+   $isValid = true;
+   $atIndex = strrpos($email, "@");
+   if (is_bool($atIndex) && !$atIndex)
+   {
+      $isValid = false;
+   }
+   else
+   {
+      $domain = substr($email, $atIndex+1);
+      $local = substr($email, 0, $atIndex);
+      $localLen = strlen($local);
+      $domainLen = strlen($domain);
+      if ($localLen < 1 || $localLen > 64)
+      {
+         // local part length exceeded
+         $isValid = false;
+      }
+      else if ($domainLen < 1 || $domainLen > 255)
+      {
+         // domain part length exceeded
+         $isValid = false;
+      }
+      else if ($local[0] == '.' || $local[$localLen-1] == '.')
+      {
+         // local part starts or ends with '.'
+         $isValid = false;
+      }
+      else if (preg_match('/\\.\\./', $local))
+      {
+         // local part has two consecutive dots
+         $isValid = false;
+      }
+      else if (!preg_match('/^[A-Za-z0-9\\-\\.]+$/', $domain))
+      {
+         // character not valid in domain part
+         $isValid = false;
+      }
+      else if (preg_match('/\\.\\./', $domain))
+      {
+         // domain part has two consecutive dots
+         $isValid = false;
+      }
+      else if
+(!preg_match('/^(\\\\.|[A-Za-z0-9!#%&`_=\\/$\'*+?^{}|~.-])+$/',
+                 str_replace("\\\\","",$local)))
+      {
+         // character not valid in local part unless 
+         // local part is quoted
+         if (!preg_match('/^"(\\\\"|[^"])+"$/',
+             str_replace("\\\\","",$local)))
+         {
+            $isValid = false;
+         }
+      }
+      if ($isValid && !(checkdnsrr($domain,"MX") || 
+          checkdnsrr($domain,"A")))
+      {
+         // domain not found in DNS
+         $isValid = false;
+      }
+   }
+   return $isValid;
+}
+?>

validation/usercheck.js

@@ -0,0 +1,52 @@
+function checkUser(str) // Creates a new checkUser function.
+{
+
+ if (str.length==0) // checks if the str variable inside the checkUser function is equal to 0
+ {
+  document.getElementById("validateCheck").innerHTML=""; // Gets the html object by it's id, in this case it's id is validateCheck
+  return; // Returns the end result of the function
+ }
+
+ xmlHttp=GetXmlHttpObject();
+ if (xmlHttp==null) // Checks whether the users browser allows ajax
+ {
+  alert ("Please use a browser that has ajax enabled!"); // Alerts if the users browser does not support ajax
+  return; // Returns the function
+ }
+
+ var url="validation/usercheck.php"; // Creates a new variable called url
+ url=url+"?search="+str; // Assigns an id to the php file (usercheck.php?id=user)
+ url=url+"&sid="+Math.random(); // Assigns a random math function to the url
+ xmlHttp.onreadystatechange=stateChanged; // If the forms state has changed
+ xmlHttp.open("GET",url,true); // Gets a pages content using ajax
+ xmlHttp.send(null);
+}
+
+function stateChanged()
+{
+ if (xmlHttp.readyState==4)
+ {
+  document.getElementById("validateCheck").innerHTML=xmlHttp.responseText;
+ }
+}
+
+function GetXmlHttpObject()
+{
+ var xmlHttp=null;
+ try
+ {
+  xmlHttp=new XMLHttpRequest();
+ }
+ catch (e)
+ {
+  try
+  {
+   xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
+   }
+  catch (e)
+  {
+   xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
+   }
+ }
+return xmlHttp;
+}

validation/usercheck.php

@@ -0,0 +1,29 @@
+<?php
+require_once("func_validEmail.php");
+require_once("../config/datenbankanbindung.php");
+
+// Get the user id from URL
+#$search=htmlspecialchars(mysql_real_escape_string($_GET["search"]));
+$search=strtolower($_GET["search"]);
+if(validEmail($search)){
+ $db = dbconnect();
+ $query = $db->query("SELECT * FROM imt_user WHERE lower(mail) = '" .$search."'") or die(mysql_error()); // Change users to the database where you keep your usernames, and likewise with username
+ 
+ list($user_id) = $query->fetch_array();
+ $row = $query->fetch_array();
+ if(empty($user_id))
+ {
+ $check = '<span class="correct">Der Benutzer ist verf&uuml;gbar.</span>';
+  }
+else
+ {
+ $check = '<span class="wrong">Der Benutzer ist im System bereits vorhanden!</span>';
+ }
+}else{
+ #$check = '<span class="wrong">Ung&uuml;ltiges Mailformat oder Domain ist falsch</span>';
+ $check = '';
+}
+
+// Echos whether the user exists or not.
+echo $check;
+?>