hash_update() – Adding Data to an Active Hash Context
hash_update() is a PHP function that appends a string of data to an active hash computation context created by hash_init(), takes a resource context and a string data as parameters, and returns TRUE upon successful update of the hash digest.
bool hash_update ( resource $context, string $data )The function appends the provided $data string to the hash computation context represented by $context, which must be a resource returned by hash_init().
Parameters
context
The hash computation context returned by hash_init().
data
The data string to be added to the hash digest.
Return value
Returns TRUE on success.
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