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hash_file

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. 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

file_put_contents('example.txt''The quick brown fox jumped over the lazy dog.');

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

以上例程会输出:

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

  • hash
  • hash_algos
  • hash_copy
  • hash_file
  • hash_final
  • hash_hmac
  • hash_hmac_file
  • hash_init
  • hash_update
  • hash_update_file
  • hash_update_stream
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