hash_file

(PHP 5 >= 5.1.2, PHP 7, PHP 8, PECL hash >= 1.1)

hash_fileGenerate a hash value using the contents of a given file

Description

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

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.

Return Values

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.

Changelog

Version Description
8.1.0 The options parameter has been added.

Examples

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('md5''example.txt');
?>

The above example will output:

5c6ffbdd40d9556b73a21e63c3e0e904

See Also

  • hash() - Generate a hash value (message digest)
  • hash_hmac_file() - Generate a keyed hash value using the HMAC method and the contents of a given file
  • hash_update_file() - Pump data into an active hashing context from a file
  • md5_file() - Calculates the md5 hash of a given file
  • sha1_file() - Calculate the sha1 hash of a file

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