hash_update_file() – Fill Data from a File into an Active Hash Context
The hash_update_file() function reads a file and feeds its contents into an existing hash context, optionally using a stream context, returning true on success or false on failure, and is useful for generating file hashes in PHP applications.
bool hash_update_file(resource $hcontext, string $filename[, resource $scontext = NULL])
The function updates an active hash context with data read from a file.
Parameters:
hcontext – The hash context resource returned by hash_init() .
filename – Path to the file to be hashed; supports fopen wrappers.
scontext – Optional stream context resource created by stream_context_create() .
Return value: Returns TRUE on success, or FALSE on failure.
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