setlocale
checking the sha1 of the file. ideal for download scripts making sure the file the user is downloading is not currupt
by checking the sha1 key
<?php
$filename = './Path/To/Your/File.zip';
if (file_exists($filename)) {
echo"i see the file";
} else {
echo "recheck the link file maybe broken";
}
$file = sha1_file('./Path/To/Your/File.zip');
echo"<br>is file hash valid?";
echo"hash = add the hash here<br>";
echo"hash of file :";
print($file);
?>
sha1_file
(PHP 4 >= 4.3.0, PHP 5)
sha1_file — Berechnet den SHA1-Hash einer Datei
Beschreibung
string sha1_file
( string
$filename
[, bool $raw_output = false
] )
Berechnet den SHA1-Hash der Datei spezifiert durch
den filename unter Verwendung des
» US Secure Hash Algorithmus 1
und gibt den Hashwert zurück. Der Hash ist ein 40 Zeichen langer
Hexadezimalwert.
Parameter-Liste
-
filename -
Der Dateiname der Datei deren Hash-Wert berechnet wird.
-
raw_output -
Falls
TRUE, wird der SHA1-Extrakt im Raw-Binary-Format mit einer Länge von 20 Zeichen zurückgegeben.
Rückgabewerte
Gibt bei Erfolg einen String zurück, ansonsten FALSE.
Beispiele
Beispiel #1 sha1_file()-Beispiel
<?php
foreach(glob('/home/kalle/meinprojekt/*.php') as $ent)
{
if(is_dir($ent))
{
continue;
}
echo $ent . ' (SHA1: ' . sha1_file($ent) . ')', PHP_EOL;
}
?>
Changelog
| Version | Beschreibung |
|---|---|
| 5.1.0 | Die Funktion verwendet jetzt die Streams API. Das bedeutet, dass Sie die Funktion mit Wrappern wie sha1_file('http://example.com/..') nutzen können. |
| 5.0.0 |
Einführung des raw_output Parameters
|
Siehe auch
- sha1() - Berechnet den SHA1-Hash eines Strings
- md5_file() - Berechnet den MD5-Code einer Datei
- crc32() - Berechnet den polynomischen CRC32-Wert eines Strings
add a note
User Contributed Notessha1_file
admin at cmsrevolution dot com
05-Aug-2006 05:02
05-Aug-2006 05:02
gubatron at gmail dot com
10-Feb-2006 04:02
10-Feb-2006 04:02
P2P programs like LimeWire utilize sha1 to identify files. However they do it in base32. Here's an utility class if you want to write a Gnutella client in PHP5
/**
Utility base32 SHA1 class for PHP5
Copyright (C) 2006 Karl Magdsick (original author for Python)
Angel Leon (ported to PHP5)
Lime Wire LLC
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
class SHA1 {
static $BASE32_ALPHABET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567';
/** Given a file it creates a magnetmix */
static function fileSHA1($file) {
$raw = sha1_file($file,true);
return SHA1::base32encode($raw);
} //fileSHA1
/** Takes raw input and converts it to base32 */
static function base32encode($input) {
$output = '';
$position = 0;
$storedData = 0;
$storedBitCount = 0;
$index = 0;
while ($index < strlen($input)) {
$storedData <<= 8;
$storedData += ord($input[$index]);
$storedBitCount += 8;
$index += 1;
//take as much data as possible out of storedData
while ($storedBitCount >= 5) {
$storedBitCount -= 5;
$output .= SHA1::$BASE32_ALPHABET[$storedData >> $storedBitCount];
$storedData &= ((1 << $storedBitCount) - 1);
}
} //while
//deal with leftover data
if ($storedBitCount > 0) {
$storedData <<= (5-$storedBitCount);
$output .= SHA1::$BASE32_ALPHABET[$storedData];
}
return $output;
} //base32encode
}