Of the License, or (at your option) any later version.
Sha1 hasher download software#
Modify it under the terms of the GNU General Public LicenseĪs published by the Free Software Foundation either version 2 This program is free software you can redistribute it and/or Here's an utility class if you want to write a Gnutella client in PHP5Ĭopyright (C) 2006 Karl Magdsick (original author for Python) P2P programs like LimeWire utilize sha1 to identify files. On my system, I was able to use this function to generate the hash of a 2.6GB file in 22 seconds, whereas I could not with the second method, due to an out-of-memory error (which took 185 seconds).
Just try to keep this in mind if you decide to load the file's contents yourself, in lieu of using this function. If you have larger ones, though, loading the entirety of file into memory is a bad idea: best case, you slow down your server as it tries to handle the request worse case, you run out of memory and don't get your hash at all. If you can guarantee that you'll only ever have to hash relatively small files, this difference means very little. Method two, however, loads the contents of $file as they are needed to create the hash. The second method loads the entirety of $file into memory before passing it to sha1($str). The key difference, as far as I can tell, is how the file's contents are loaded.
If they were, I seriously doubt this function would exist. It's important to realize that these two methods are NOT the same thing.
Sha1 hasher download archive#
Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto searchĪs some have pointed out, you have two ways to generate the hash of a file:
0 kommentar(er)
