Pump data into an active hashing context from a file
Syntax
hash_update_file(HashContext $context, string $filename, ?resource $stream_context = null): bool
Parameters
contextHashing context returned by hash_init().
filenameURL describing location of file to be hashed; Supports fopen wrappers.
stream_contextStream context as returned by stream_context_create().
Return
Returns true on success or false on failure.
Examples
1 · context filename
<?
$context = hash_init('sha384');
$filename = $_SERVER['DOCUMENT_ROOT'] . '/assets/txt/file.txt';
hash_update_file($context, $filename);
echo hash_final($context);
?>3519fe5ad2c596efe3e276a6f351b8fc0b03db861782490d45f7598ebd0ab5fd5520ed102f38c4a5ec834e98668035fc
2 · stream_context
<?
$context = hash_init('sha384');
$filename = $_SERVER['DOCUMENT_ROOT'] . '/assets/txt/file.txt';
$stream_context = stream_context_create(array('http' => array('method' => 'POST')));
hash_update_file($context, $filename, $stream_context);
echo hash_final($context);
?>3519fe5ad2c596efe3e276a6f351b8fc0b03db861782490d45f7598ebd0ab5fd5520ed102f38c4a5ec834e98668035fc
3 · Return
<?
$context = hash_init('sha384');
$filename = $_SERVER['DOCUMENT_ROOT'] . '/assets/txt/file.txt';
$stream_context = stream_context_create(array('http' => array('method' => 'POST')));
$return = hash_update_file($context, $filename, $stream_context);
hash_final($context);
var_export($return);
?>true
