PHP md5_file() Function

The md5_file() function is an inbuilt function in PHP which is used to generate the md5 hash value of a given file. This function returns a string on success otherwise it returns FALSE.

Syntax:

md5_file( $file, $raw )

Parameters: This function accepts two parameters as mentioned above and described below.

• $file: It is a mandatory parameter which specifies the file for SHA1 hash.
• $raw: It is an optional parameter which specifies boolean values.
  • TRUE – Raw 16 character binary format
  • FALSE – By Default. 32 character long hex number.

Return Value: This function returns a string of MD5 hash on success and returns FALSE otherwise.

Supposed there is a file named “gfg.txt” which has below content:

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Below programs illustrate the md5_file() function:

Program 1:

<?php

// PHP  program to illustrate
// md5_file()
function $gfg = md5_file("gfg.txt");

echo $gfg;

?>

Output:

 1d4e50ae1992ad8adf2f7bb6ee4dd0cd 

Program 2: With optional parameter $raw with different values TRUE and FALSE.

<?php
// PHP  program to illustrate
// md5_file() function

// Without optional parameter
echo md5_file("gfg.txt") . "\n";

// with optional parameter
$raw = FALSE (by default)

// no changes in result
echo md5_file("gfg.txt", FALSE) . "\n";

// with optional parameter
$raw = TRUE

// result changed
echo md5_file("gfg.txt", TRUE) . "\n";

?>

Output:

1d4e50ae1992ad8adf2f7bb6ee4dd0cd 
1d4e50ae1992ad8adf2f7bb6ee4dd0cd ????/{??M??
 

Reference: http://php.net/manual/en/function.md5-file.php