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, or false on failure.
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