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# mcrypt_enc_get_supported_key_sizes

(PHP 4 >= 4.0.2)

mcrypt_enc_get_supported_key_sizes -- Returns an array with the supported keysizes of the opened algorithm

## Description

``array mcrypt_enc_get_supported_key_sizes` (resource td)`

Returns an array with the key sizes supported by the algorithm specified by the encryption descriptor. If it returns an empty array then all key sizes between 1 and mcrypt_enc_get_key_size() are supported by the algorithm.

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mcrypt_enc_get_key_size | Up | mcrypt_enc_get_iv_size