The hash_file() function is an inbuilt function in PHP which is used to generate a hash value using the contents of a given file.
Syntax:
string hash_file( $algo, $file, $raw_opt )
Parameters: This function accept three parameters as mention above and describe below.
- $algo: It is the required parameter which specifies the selected hashing algorithm.
- $file: This parameter is used to hold the file url to be hashed.
- $raw_opt: If the parameter is set to true then output will be raw binary data and if the parameter is set to False then output will be lowercase hexits.
Return Value: This function returns a string containing the calculated message digest as lowercase hexits.
Below programs uses the file gfg.txt and contents of the file are:
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Below programs illustrate the hash_file() function in PHP:
Program 1:
<?php   // PHP program to illustrate // hash_file function     // Create a file to calculate hash of file_put_contents('gfg.txt', 'GFG');   // Display Result echo hash_file('md5', 'gfg.txt') . "</br>"; ?> |
Output:
083de2341fd19dce0de9e60f3e9a8e0d
Program 2:
<?php   // PHP program to illustrate // hash_file function     // Create a file to calculate hash of file_put_contents('gfg.txt', 'SUDO PLACEMENT');   // Display Result echo hash_file('md5', 'gfg.txt') . "</br>";     // Create a file to calculate hash of file_put_contents('gfg.txt', 'GCET');   // Display Result echo hash_file('sha1', 'gfg.txt'); ?> |
Output:
083de2341fd19dce0de9e60f3e9a8e0d a287a6ac47afec4140253a10b8a4c9c1e4f7a45e
