Online PHP editor | rfc for tvUUR

@ 2018-01-08T06:24:42Z

<?php
// key which will sign the data 
$key = hash('sha256', 'Unique user data or Some secret');

// the data
$array = [
    'foobar' => 'baz'    
];

// encode the payload
$json = json_encode($array);

// sign it with key
$token = hash_hmac('sha256', $json, $key);

// set response header
//header('X-Checksum: '.$token);

//echo $json;

## This is how the receiver would verify the received data.

// faked: this would be populated by the request/response
$_POST['json'] = $json; 
$_SERVER['X-Checksum'] = $token; 

// verify the data matches token by signing the data with the key
$check = hash_hmac('sha256', $_POST['json'], $key);
if (hash_equals($token, $check)) {
    echo 'Verified';
} else {
    echo 'Tampered';
}

// example tampered data
$_POST['json'] = 'tampered'.$json; 

$check = hash_hmac('sha256', $_POST['json'], $key);
if (hash_equals($token, $check)) {
    echo 'Verified';
} else {
    echo 'Tampered';
}

Output for git.master, git.master_jit, rfc.property-hooks: VerifiedTampered

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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