hash

Generate a hash value (message digest)

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

`algo`

- Name of selected hashing algorithm (e.g. `"sha256"`). For a list of supported algorithms see `hash_algos`.

`data`

- Message to be hashed.

`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.
8.0.0 | `hash` now throws a `ValueError` exception if `algo` is unknown; previously, &false; was returned instead.

&reftitle.examples;

### A `hash` example

    <?php
    echo hash('sha256', 'The quick brown fox jumped over the lazy dog.');
    ?>

&example.outputs;

    68b1282b91de2c054c36629cb8dd447f12f096d3e3c587978dc2248444633483

&reftitle.seealso;

- `hash_init`
- `hash_file`
- `hash_hmac`