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@ 2014-09-04T19:24:30Z

<?php
function hash_pbkdf2_reg($a = 'sha256', $password, $salt, $rounds = 5000, $key_length = 32, $raw_output = false) 
{ 
  // Derived key 
  $dk = '';
 
  // Create key 
  for ($block=1; $block<=$key_length; $block++) 
  { 
    // Initial hash for this block 
    $ib = $h = hash_hmac($a, $salt . pack('N', $block), $password, true); 
 
    // Perform block iterations 
    for ($i=1; $i<$rounds; $i++) 
    { 
      // XOR each iteration
      $ib ^= ($h = hash_hmac($a, $h, $password, true)); 
    } 
 
    // Append iterated block 
    $dk .= $ib;
  } 
 
  // Return derived key of correct length 
  $key = substr($dk, 0, $key_length);
  return $raw_output ? $key : base64_encode($key);
}

$salt = '1234567890123456';
$iterations = 200000;
$length = 256;
$hash1 = hash_pbkdf2_reg('sha256', 'plnlrtfpijpuhqylxbgqiiyipieyxvfsavzgxbbcfusqkozwpngsyejqlmjsytrmd', $salt, $iterations, $length);

Output for git.master, git.master_jit, rfc.property-hooks: Deprecated: Optional parameter $a declared before required parameter $salt is implicitly treated as a required parameter in /in/uTKa2 on line 2
Process exited with code 137.

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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