hash password php with variable code example

Example 1: php hash password

/* User's password. */
$password = 'my secret password';

/* Secure password hash. */
$hash = password_hash($password, PASSWORD_DEFAULT);

Example 2: php hash password

/* 100 ms. */
$time = 0.1;

/* Initial cost. */
$cost = 10;

/* Loop until the time required is more than 100ms. */
do
{
  /* Increase the cost. */
  $cost++;
  
  /* Check how much time we need to create the hash. */
  $start = microtime(true);
  password_hash('test', PASSWORD_BCRYPT, ['cost' => $cost]);
  $end = microtime(true);
}
while (($end - $start) < $time);

echo 'Cost found: ' . $cost;