hash_file
(PHP 5 >= 5.1.2, PECL hash >= 1.1)
hash_file — Generate 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. 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() 以上例程会输出:
<?php
file_put_contents('example.txt', 'The quick brown fox jumped over the lazy dog.');
echo hash_file('md5', 'example.txt');
?>
5c6ffbdd40d9556b73a21e63c3e0e904
参见
- hash() - Generate a hash value (message digest)
- hash_hmac_file() - Generate a keyed hash value using the HMAC method and the contents of a given file
- hash_update_file() - Pump data into an active hashing context from a file
- md5_file() - 计算指定文件的 MD5 散列值
- sha1_file() - 计算文件的 sha1 散列值