verification

How to check whether an email id exists or not using PHP? and to get information about the owner of the email id? is it possible to get the information about the owner of the email id? do have to work with some protocols like POP? Please help me. RobertPitt Lets say a user submits the following email address: stackuser@stackoverflow.com The checks you would want to perform in order are like so: Is the address valid Does the domain run a mail server / MX Records Is it blacklisted Firstly within PHP you can validate an email by using filter_var like so: $is_valid = filter_var("stackuser

In theory, it should be possible to at least brute force a verification of a lock-free algorithm (there are only so many combinations of function calls intersecting). Are there any tools or formal reasoning processes available to actually prove that a lock-free algorithm is correct (ideally it should also be able to check for race conditions and the ABA problem as well)? Note: If you know a way to just prove one point (e.g. only prove that it is safe from the ABA problem) or a problem I haven't mentioned then post the solution anyway. In the worst case scenario, each method can be done in turn

I am creating triggers & procedures on a table from a winform application which uses sql server 2005 express. I want that when the user clicks the create trigger/procedure button, then it creates both the objects & displays on a new Form that triggers & procedures are created with the names and tables on which they are created. I mean that how do i verify that the objects are created. i want to verify and show it to the user that the objects are created on the so and so table. After your CREATE XXX ... , you can run SELECT OBJECT_ID('XXX') Of course, if you have no error the object exists

I'm working with my little PHP project and I'm trying to implement hashing on registration and I need to verify my hashed password when user want to log in. I tried a lot but I don't really get how I could use password_verify function in my code. In my registration.php I have a code: $username = $_POST['username']; $password = password_hash($_POST['password'], PASSWORD_DEFAULT); $email = $_POST['email']; My login.php file looks like this: $username = $_POST['username']; $password = $_POST['password']; $username = htmlentities($username, ENT_QUOTES, "utf-8"); $password = htmlentities($password,

I have recently been looking at handling API levels fragmentation and found a great tutorial on supporting different API Levels in your source code: As stated in the tutorial, in order to avoid run-time error of using newer classes/methods than the API Level ones should check the API level and use lazy loading. I have checked the code and can confirm that on Android <2.0 you must use lazy loading to avoid VerifyError. What was a huge surprise for me was that in 2.1 the lazy loading is not necessary anymore. I will use the Camera.setDisplayOrientation method to demonstrate the issue. The method

How can I state (in Dafny) an " ensures " guarantee that the object returned by a method will be "new", i.e., will not be the same as an object used anywhere else (yet)? The following code shows a minimal example: method newArray(a:array<int>) returns (b:array<int>) requires a != null ensures b != null ensures a != b ensures b.Length == a.Length+1 { b := new int[a.Length+1]; } class Testing { var test : array<int>; method doesnotwork() requires this.test!=null requires this.test.Length > 10; modifies this { this.test := newArray(this.test); //change array a with b this.test[3] := 9; //error

I'm trying to set up a callback handler for IPN (paypal) verification. I know what curl does, but I don't know what 'cacert.pem' is (certificate...?). this is where the callback.php file fails (exists): curl_setopt($ch, CURLOPT_CAINFO, 'cacert.pem'); if( !($res = curl_exec($ch)) ) { echo ("Got " . curl_error($ch) . " when processing IPN data"); curl_close($ch); exit; } curl_close($ch); With the following error message: Got error setting certificate verify locations: CAfile: cacert.pem CApath: none when processing IPN data So I downloaded cacert.pem and copied to the directory where the