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hash_update_file

Pump data into an active hashing context from a file (PHP 5 >= 5.1.2, PECL hash:1.1-1.5)
bool hash_update_file ( resource context, string filename [, resource context] )

Parameters

context

Hashing context returned by hash_init().

filename

URL describing location of file to be hashed; Supports fopen wrappers.

context

Stream context as returned by stream_context_create().

Return Values

Returns TRUE on success or FALSE on failure.