Online PHP editor | output for uTKa2

@ 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 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: 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.
Output for 8.0.0 - 8.0.30: Deprecated: Required parameter $password follows optional parameter $a in /in/uTKa2 on line 2 Deprecated: Required parameter $salt follows optional parameter $a in /in/uTKa2 on line 2
Process exited with code 137.
Output for 5.1.2 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33: Process exited with code 137.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.1: Fatal error: Call to undefined function hash_hmac() in /in/uTKa2 on line 11
Process exited with code 255.
Output for 4.4.5 - 4.4.9: Fatal error: Call to undefined function: hash_hmac() in /in/uTKa2 on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4: Fatal error: Call to undefined function: hash_hmac() in /in/uTKa2 on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1: Fatal error: Call to undefined function: hash_hmac() in /in/uTKa2 on line 11

preferences:dark modelive preview