hash_file
Generate a hash value using the contents of a given file
Description
stringfalse hash_file(
string $algo,
string $filename,
bool $binary = false,
array $options = []
)
Parameters
-
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.
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.
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('sha256', 'example.txt');
?>
The above example will output:
68b1282b91de2c054c36629cb8dd447f12f096d3e3c587978dc2248444633483