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# mcrypt_enc_self_test

(PHP 4 >= 4.0.2)

mcrypt_enc_self_test -- This function runs a self test on the opened module

## Description

``int mcrypt_enc_self_test` (resource td)`

This function runs the self test on the algorithm specified by the descriptor td. If the self test succeeds it returns zero. In case of an error, it returns 1.

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