w3resource

PHP: md5_file() function

Description

The md5_file() function is used to calculate the md5 hash ( the hash as a 32-character hexadecimal number ) of a given file.

Version:

(PHP 4 and above)

Syntax:

md5_file(file_name, raw_output)

Parameter:

Name Description Required /
Optional
Type
file_name The file name. Required String
raw_output Refers hex or binary output format, Returns raw 16-bit binary format if raw_output sets TRUE and return 32-bit hex format for setting FALSE (default). Optional Boolean

Return value:

Returns a string on success, FALSE otherwise.

Value Type: String.

Pictorial Presentation

php-string-md5_file()

Example:

<?php
$file_name = 'testvf.txt';
echo md5_file($file_name);
?>

Output:

f006da995a5475841a21f546be8e4f11 

View the example in the browser

See also

PHP Function Reference

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PHP: Tips of the Day

In PHP, there are two versions of logical AND and OR operators.

Operator True if
$a and $b Both $a and $b are true
$a && $b Both $a and $b are true
$a or $b Either $a or $b is true
$a || $b Either $a or $b is true

Note that the && and || opererators have higher precedence than and and or. See table below:

Evaluation Result of $e Evaluated as
$e = false || true True $e = (false || true)
$e = false or true False ($e = false) or true

Because of this it's safer to use && and || instead of and and or.