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PHP implementation of digital verification code and digital operation verification Code, PHP digital Verification code operation In this paper, the digital Verification Code and digital operation verification Code for PHP implementation are described. Share to everyone for

;}function Num2hanzi ($STR) {$numarr = Numdatabase ();$hanziarr = Hzdatabase ();Preg_match ('/[0-9]+/', $str, $t);$num = intval ($t [0]);$rstr = ";if (In_array ($num, $numarr)) {foreach ($numarr as $k = = $v) {if ($v = = $num) {$kk = $k;}}$rstr = Str_replace ($num, $hanziarr [$kk], $STR);}return $rstr;}Kanji to Digitalfunction Hanzi2num ($STR) {$numarr = Numdatabase ();$hanziarr = Hzdatabase ();foreach ($hanziarr as $k = = $v) {if (Strpos ($str, $v)!==false) {$rstr = Str_replace ($v, $numarr [$k

Php-based digital verification code and digital operation verification code, and php-based digital verification code operation This article describes the php-implemented digital verification code and the digital operation verification code. Share it with you for your referen

OrderRecent work has been around the digital certificate, the understanding of CA certificate is a little bit, but not so deep, now to use this aspect of things, obviously still a little lacking, then from this beginning, I will my own study, work history with everyone to share, I hope to understand the CA The certificate of the children's shoes is helpful.Obviously, this article is mostly a theoretical introduction, followed by a number of relevant e

2012-07-14 WCDJ The concept of digital signature is easy to understand, and the details are discussed in detail in the commentary. English Original: http://www.youdzone.com/signature.html (by David Youd) Chinese version: http://www.ruanyifeng.com/blog/2011/08/what_is_a_digital_signature.html (by Nanyi) ------------------------------------------------------------------------------------------------------- What is a

Android secure encryption feature article index Android Secure encryption: Symmetric encryption Android Secure encryption: Asymmetric encryption Android Secure encryption: Message digest msg Digest Android Secure encryption: Digital signatures and digital certificates Android Secure encryption: HTTPS programming All of the above learning, symmetric encryption, asymmetric encryp

OrderThe previous article introduced several concepts related to CA certificates, which are important to understand the digital certificate and how it works. This article is mainly to analyze the CA certificate, to tell the basic composition of the certificate, which is necessary to generate a correct, accessible certificate.ConstituteNonsense not much to say, directly on the content.Let's look at what the certificate is, and when you view the certifi

Tags: style blog http color os sp on div logOriginal: Oracle non-digital to digital type In Oracle, if the content of a field is not fully digital, it can be filtered in the following wayTo_number (substr (Translate (a.vital_signs_cvalues,'9876543210.' ||A.vital_signs_cvalues,'9876543210.'), 1, InStr (Translate (A.vital_signs_cvalues,'987

Personally think this problem should not be mentioned, after all, before Windows7, our Vista has been able to connect digital photo frame and other digital appliance equipment. For the WINDOWS7 system, not only can connect, but can directly connect, no need to install the driver. Of course, the current type of support is also limited, such as Windows7 official release, the general brand can be directly conn

Preface First look at Baidu Encyclopedia of Digital Signatures and digital certificate interpretation: Digital Signature: A fixed-digit message digest is computed by the hash algorithm agreed by both parties. Mathematically guaranteed: As long as any one of the changes in the message, the recalculated report digest to the value will not match the original value.

Red Meter Note Enhanced Edition set up digital Power tutorial 1, in the Red Meter note interface Click "Settings" and then click inside the "all set" you will see a "power" option, we open click to enter: 2, in the electricity into the interface to find "status bar Power style", you will find a variety of ways to display electricity, we go straight to the topic, click the "digital mode" can be se

Android security encryption feature article index Android Secure encryption: Symmetric encryption Android Secure encryption: Asymmetric encryption Android Secure encryption: Message digest Digest Android Security Encryption: Digital signatures and digital certificates Android Secure encryption: HTTPS programming The above learning all content, symmetric en

The Vintasoftbarcode.net Library Barcode Control is a perfect barcode read-write. NET library that supports reading barcodes from digital images or generating digital picture barcodes.Specific features: Support Multithreading Support for creating barcode pictures Supports specifying size and resolution for generated barcodes has many options to control bar code creation Supports rea

The project encountered a demand, to the Chinese-style display of Arabic numerals to the European style, that is, each three-bit display, separated by commas, such as 12345678 to 12,345,678 of the display mode, the following is the specific JavaScript code implementation: var ivalue = 20002365879; The number to convert var svalue = ivalue+ '; var avalue = new Array (); var inum = svalue.length%3; var Aresult; Convert result var index = 0; if (svalue.length The above JavaScript to c

The example of this article is about the method of using super long (large) digital operation to prevent digital display with scientific counting method. Share to everyone for your reference, specific as follows: PHP makes a mistake when calculating large numeric operations, and when the number is too large, the value becomes the scientific count. So how do you do PHP super large numerical operations, incl

Http://www.cnblogs.com/1-2-3/archive/2007/09/17/colloquialism-digital-certificate-part1.htmlSummaryThis series is easy to read, so you can understand the basic principles of digital signatures and how to apply them (even if you are an enterprise boss who is not computer savvy, you can read this article). Then we step into the technical details, and finally will give a B/s information system using the

can not be set up at the same time, that is, odd arrangement and even arrangement. You can put a random array of arrays from left to right from top to bottom with a one-dimensional array, as shown in Figure 1-2 above we can represent {8,7,1,5,2,6,3,4,0} where 0 represent spaces.In this array we first compute the result that it can rearrange, and the formula is: ∑ (f (x)) =y, where F (x) is a number preceded by the number of small numbers,y is odd and even when there is a solution. (Eight

Turn from: HTTPS Unidirectional authentication Instructions _ digital certificate, digital signature, SSL (TLS), SASLBecause TLS + SASL is used in the project to do the security authentication layer. So read some online information, here to do a summary.1. First recommend several articles:Digital certificate: http://www.cnblogs.com/hyddd/archive/2009/01/07/1371292.htmlDigital certificates and ssl:http://www

Direct Digital Frequency Synthesis Technology and Its Implementation of C ++, digital frequency synthesis implementation DDFS-Direct Digital Frequency Synthesizer Direct Digital Frequency synthesis technology can be used to generate periodic signals of arbitrary waveforms. The so-called DDFS is simply a look-up Table m

is different, and that it is guaranteed to be unique. the process is irreversible , that is, the text cannot be reversed by a digest (it seems that SHA1 can already be cracked, SHA2 has not.) Generally think that can not be cracked, or crack need to spend too much time, cost-effective low).With this feature, you can verify the integrity of the message. Message digests are typically used in digital signatures, which are described in the following dir