php hash password code example

Example 1: php hash password

//hash password
$pass = password_hash($password, PASSWORD_DEFAULT);

//verify password
password_verify($password, $hashed_password); // returns true

Example 2: php hash password

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

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

Example 3: php hash password

/* New password. */
$password = $_POST['password'];

/* Remember to validate the password. */

/* Create the new password hash. */
$hash = password_hash($password, PASSWORD_DEFAULT);

Example 4: php hash password

<?php
/**
 * In this case, we want to increase the default cost for BCRYPT to 12.
 * Note that we also switched to BCRYPT, which will always be 60 characters.
 */
$options = [
    'cost' => 12,
];
echo password_hash("rasmuslerdorf", PASSWORD_BCRYPT, $options);
?>

Example 5: php hash password

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

/* MD5 hash to be saved in the database. */
$hash = md5($password);

Example 6: php hash password

<?php
echo 'Argon2i hash: ' . password_hash('rasmuslerdorf', PASSWORD_ARGON2I);
?>

Example 7: php hash password

/* Include the database connection script. */
include 'pdo.php';

/* Username. */
$username = 'John';

/* Password. */
$password = 'my secret password';

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

/* Insert query template. */
$query = 'INSERT INTO accounts (account_name, account_passwd) VALUES (:name, :passwd)';

/* Values array for PDO. */
$values = [':name' => $username, ':passwd' => $hash];

/* Execute the query. */
try
{
  $res = $pdo->prepare($query);
  $res->execute($values);
}
catch (PDOException $e)
{
  /* Query error. */
  echo 'Query error.';
  die();
}

Example 8: 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;

Example 9: php hash password

<?php
/**
 * We just want to hash our password using the current DEFAULT algorithm.
 * This is presently BCRYPT, and will produce a 60 character result.
 *
 * Beware that DEFAULT may change over time, so you would want to prepare
 * By allowing your storage to expand past 60 characters (255 would be good)
 */
echo password_hash("rasmuslerdorf", PASSWORD_DEFAULT);
?>

Example 10: php hash password

/* Include the database connection script. */
include 'pdo.php';

/* ID of the account to edit. */
$accountId = 1;

/* Update query template. */
$query = 'UPDATE accounts SET account_passwd = :passwd WHERE account_id = :id';

/* Values array for PDO. */
$values = [':passwd' => $hash, ':id' => $accountId];

/* Execute the query. */
try
{
  $res = $pdo->prepare($query);
  $res->execute($values);
}
catch (PDOException $e)
{
  /* Query error. */
  echo 'Query error.';
  die();
}