hash_file

Generate a hash value using the contents of a given file

&reftitle.description; ``string``false```hash_file` `string` `algo` `string` `filename` `bool` `binary`&false; `array` `options`[]
&reftitle.parameters;

`algo`

- Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..). For a list of supported algorithms see `hash_algos`.

`filename`

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

`binary`

- When set to &true;, outputs raw binary data. &false; outputs lowercase hexits.

`options`

- An array of options for the various hashing algorithms. Currently, only the "seed" parameter is supported by the MurmurHash variants.

&reftitle.returnvalues;

Returns a string containing the calculated message digest as lowercase hexits unless `binary` is set to true in which case the raw binary representation of the message digest is returned.

&reftitle.changelog;

&Version; | &Description;
8.1.0 | The `options` parameter has been added.

&reftitle.examples;

### Using `hash_file`

    <?php
    /* Create a file to calculate hash of */
    file_put_contents('example.txt', 'The quick brown fox jumped over the lazy dog.');

    echo hash_file('sha256', 'example.txt');
    ?>

&example.outputs;

    68b1282b91de2c054c36629cb8dd447f12f096d3e3c587978dc2248444633483

&reftitle.seealso;

- `hash`
- `hash_hmac_file`
- `hash_update_file`
- `md5_file`
- `sha1_file`