* Encode from Legacy * * Takes an encoded string from the original Encryption class algorithms and * returns a newly encoded string using the improved method added in 2.0.0 * This allows for backwards compatibility and a method to transition to the * new encryption algorithms. * * For more details, see http://codeigniter.com/user_guide/installation/upgrade_200.html#encryption * *
($string, $legacy_mode = MCRYPT_MODE_ECB, $key = '')
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