Online PHP editor | refs for n9H4e

<?php function getKey($seed='no seed??') { return hash('sha256', $seed, 1); } function encrypt($key, $string) { $size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC); $iv = mcrypt_create_iv($size, MCRYPT_RAND); $encrypted_string = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $string, MCRYPT_MODE_CBC, $iv); return base64_encode($iv . $encrypted_string); } function decrypt($key, $encoded_string) { $binary = base64_decode($encoded_string); $size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC); $iv = substr($binary, 0, $size); $encrypted_string = substr($binary, $size); return mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $encrypted_string, MCRYPT_MODE_CBC, $iv); } $key = getKey('Some Secret String'); $encrypted = encrypt($key, 'This is a string that will be encrypted'); echo decrypt($key, $encrypted);