Generate a hash value using the contents of a given file

Descrição

hash_file(
    string $algo,
    string $filename,
    bool $binary = false,
    array $options = []
): string|false

Parâmetros

algo: Name of selected hashing algorithm (e.g. "sha256"). 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.

Valor Retornado

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.

Registro de Alterações

Versão	Descrição
8.1.0	The `options` parameter has been added.

Exemplos

Example #1 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');
?>

O exemplo acima produzirá:

68b1282b91de2c054c36629cb8dd447f12f096d3e3c587978dc2248444633483

Veja Também

hash_init() - Initialize an incremental hashing context
hash_hmac_file() - Generate a keyed hash value using the HMAC method and the contents of a given file