CODEWITHSUNDEEP
phphash
Saucepan
Saucepan

Reputation: 308

Echo hash in PHP

I have what is probably a very simple question, but seeing as I am a beginner I cant seem to find an answer. I want to print my hash to a website (to confirm that it gets hashed properly). But when i echo it, I dont get anything back. What I am expecting is a hashed string. Here is the code, please help:

  <?php

$index = 1;
$data = rand(1,4);
$myhash = hash($index, $data);

?>

<html>
<body>

<?php
    echo "$index <br>";
    echo "$data <br>";
    echo "$myhash <br>";

?>

</body>
</html>

Upvotes: 0

Views: 1996

Answers (3)

Aditya Pushkar
Aditya Pushkar

Reputation: 1

hash function requires hashing algorithm as 1st argument.

string hash(string $algo , string $data [, bool $raw_output = FALSE ])

You are not proving a hashing algorithm. Try putting md5, sha256, haval160 etc as hashing algorithm . check php.net for more info. php.net

Upvotes: 0

F3L1X79
F3L1X79

Reputation: 2675

A good practice is to debug your code.

Use this at the start of your page (for development purpose only, not production!):

<?php

error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);


$index = 1;
$data = rand(1,4);
$myhash = hash($index, $data);

?>

<html>
<body>

<?php
    echo "$index <br>";
    echo "$data <br>";
    echo "$myhash <br>";

?>

</body>
</html>

So you'll get an error like:

E_WARNING : type 2 -- hash(): Unknown hashing algorithm: 1 -- at line 5

It's because, first argument of hash() function must be a name of a hash algorithm, like "md5", "sha256", "haval160,4".

So in your case, you should change $index by something like:

$index = "sha256";

and not a number like you did.

Upvotes: 4

pbarney
pbarney

Reputation: 2833

The hash function needs a hashing algorithm specified as its first argument. You are providing the number 1 which is not a valid algorithm.

Read up on the hash function and choose the appropriate algorithm. For example:

$myhash = hash('sha256', $data);

Upvotes: 2

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