Hash 函数
PHP 手册

hash_file

(PHP 5 >= 5.1.2, PECL hash >= 1.1)

hash_fileGenerate a hash value using the contents of a given file

说明

string hash_file ( string $algo , string $filename [, bool $raw_output=false ] )

参数

algo

Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..)

filename

URL describing location of file to be hashed; Supports fopen wrappers.

raw_output

When set to TRUE, outputs raw binary data. Default value (FALSE) outputs lowercase hexits.

返回值

Returns a string containing the calculated message digest as lowercase hexits unless raw_output is set to true in which case the raw binary representation of the message digest is returned.

范例

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('md5''example.txt');
?>

上例将输出:

5c6ffbdd40d9556b73a21e63c3e0e904

参见


Hash 函数
PHP 手册