php - CodeIgniter 中的 sha1？

Question

CodeIgniter sha1 和普通 PHP sha1 有什么区别？例如:

$codeigniter_hashed = $this -> encrypt -> sha1( "test" );

和

$normal_hashed = sha1("test");

两者都将返回相同的值。CodeIgniter 在哪里使用 encryption_key？

Answer 1

如果您的 PHP 安装没有安装 sha1，您可以使用 CI 版本。如果您的 PHP 安装已经有它，则不需要使用 CI 功能。

来自用户指南:

$this->encrypt->sha1();

SHA1 encoding function. Provide a string and it will return a 160 bit one way hash. Note: SHA1, just like MD5 is non-decodable. Example: $hash =
$this->encrypt->sha1('Some string');

Many PHP installations have SHA1 support by default so if all you need is to encode a hash it's simpler to use the native function: $hash =
sha1('Some string');

If your server does not support SHA1 you can use the provided function.

更多信息:http://codeigniter.com/user_guide/libraries/encryption.html