ltrim
md5
String Functions
PHP Manual

# md5_file

(PHP 4 >= 4.2.0, PHP 5)

md5_file — Calculates the md5 hash of a given file

### Description

string md5_file ( string `$filename` [, bool `$raw_output` = false ] )

Calculates the MD5 hash of the file specified by the `filename` parameter using the » RSA Data Security, Inc. MD5 Message-Digest Algorithm, and returns that hash. The hash is a 32-character hexadecimal number.

### Parameters

`filename`

  The filename

`raw_output`

  When `TRUE`, returns the digest in raw binary format with a length of 16. Defaults to `FALSE`.

### Return Values

Returns a string on success, `FALSE` otherwise.

### Changelog

Version | Description
--- | ---
5.0.0 | Added the `raw_output` parameter
5.1.0 | Changed the function to use the streams API. It means that you can use it with wrappers, like md5_file('http://example.com/..')

### Examples

Example #1 Usage example of md5_file()

`<?php
$file = 'php-5.3.0alpha2-Win32-VC9-x64.zip';
echo 'MD5 file hash of ' . $file . ': ' . md5_file($file);
?>`

### See Also

- md5() - Calculate the md5 hash of a string
- sha1_file() - Calculate the sha1 hash of a file
- crc32() - Calculates the crc32 polynomial of a string

ltrim
md5
String Functions
PHP Manual