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Tutorial on how to encrypt and decrypt a PHP variable

, \ x50, \ x51, \ x52, \ x53, \ x54, \ x55, \ x56, \ x57, \ x58, \ x59, \ x5a, \ x5f, \ x61, \ x62, \ x63, \ x64, \ x65, \ x66, \ x67, \ x68, \ x69, \ x6a, \ x6b, \ x6c, \ x6d, \ x6e, \ x6f, \ cross, \ x71, \ x72, \ x73, \ x74, \ x75, \ x76, \ x77, \ x78, \ x79, \ x7a, \ x7f, \ x80, \ x81, \ x82, \ x83, \ x84, \ x85, \ x86, \ x87, \ x88, \ x89, \ x8a, \ x8b, \ x8c, \ x8d, \ x8e, \ x8f, \ x90, \ x91, \ x92, \ x93, \ x94, \ x95, \ x96, \ x97, \ x98, \ x99

Support for Chinese-based prefix tree (prefix trie) Python implementation with word-base granularity

International Plaza============== Items =================Prefix "SM": [(' SM ', None), (' SM \xe6\x96\xb0\xe7\x94\x9f\xe6\xb4\xbb \xe5\xb9\xbf\xe5\x9c\xba ', 5), (' SM \xe5\x9f\x8e\ Xe5\xb8\x82\xe5\xb9\xbf\xe5\x9c\xba ', 3), (' SM \xe5\xb9\xbf\xe5\x9c\xba ', 4), (' SM \xe8\xb4\xad\xe7\x89\xa9 \xe5\xb9\ Xbf\xe5\x9c\xba ', 6), (' SM \xe5\x9b\xbd\xe9\x99\x85 ', '), (' SM \xe5\x9b\xbd\xe9\x99\x85 \xe5\xb9\xbf\

Python string built-in functions

example is as follows: Str.count ('o'): 3Str.count ('Run', 0, 10): 1 4 Bytes.decode (encoding= "Utf-8", errors= "strict")There is no Decode method in Python3, but we can use the decode () method of the Bytes object to decode the given bytes object, which can be encoded back by bytes ().#!/usr/bin/python3Str="Beginner's Tutorial"; Str_utf8= Str.encode ("UTF-8") STR_GBK= Str.encode ("GBK")Print(str)Print("UTF-8 Code:", Str_utf8)Print("GBK Code:", STR_GBK)Print("UTF-8 decoding:", S

Linux experiment--Buffer Overflow Vulnerability experiment

a program to crash, and in the program, the overflow data overwrites the return address. And if the data that overwrites the return address is another address, then the program jumps to that address, and if the address is a piece of well-designed code to implement other functions, this code is shellcode.Observe the following code:#include int main (){Char *name[2];Name[0] = "/bin/sh";NAME[1] = NULL;Execve (Name[0], name, NULL);}The shellcode of this experiment is the compiled version of the cod

Linux experiment--Buffer Overflow Vulnerability experiment

program to crash, and in the program, the overflow data overwrites the return address. And if the data that overwrites the return address is another address, then the program jumps to that address, and if the address is a piece of well-designed code to implement other functions, this code is shellcode.Observe the following code:#include int main (){Char *name[2];Name[0] = "/bin/sh";NAME[1] = NULL;Execve (Name[0], name, NULL);}The shellcode of this experiment is the compiled version of the code

Encryption and decryption tutorial on God shield (i) PHP variable available characters _php tips

, \x4d, \x4e, \x4f, \x50, \x51, \x52, \x53, \x54, \ X55, \x56, \x57, \x58, \x59, \x5a, \x5f, \x61, \x62, \x63, \x64, \x65, \x66, \x67, \x68, \x69, \x6a, \x6b, \x6c, \x6d, \x6 E, \x6f, \x70, \x71, \x72, \x73, \x74, \x75, \x76, \x77, \x78, \x79, \x7a, \x7f, \x80, \x81, \x82, \x83, \x84, \x85, \x86, \x87, \x88, \x89, \x8a, \x8b, \x8c, \x8d, \x8e, \x8f, \x90, \x91, \x92, \x93, \x94, \x95, \x96, \x97, \x98, \x99, \x9a, \ x9b, \x9c, \x9d, \x9e, \x9f, \xa0,

DDR4 memory with what motherboard

What motherboard does DDR4 memory use? DDR4 memory believe that everyone will not be unfamiliar, now installed many friends will choose DDR4 memory. But not all platforms support DDR4, the following computer Pepsi for DIY computer enthusiasts easy to understand the introduction of DDR4 memory with what the motherboard, how to see whether the motherboard support DDR4 memory, small white children's shoes, quickly to increase knowledge, become a DIY talent. What motherboard does Q:DDR4

What motherboard DDR4 memory can use

DDR4 memory believe that everyone will not be unfamiliar, now installed many friends will choose DDR4 memory. But not all platforms support DDR4, the following computer Pepsi for DIY computer enthusiasts easy to understand the introduction of DDR4 memory with what the motherboard, how to see whether the motherboard support DDR4 memory, small white children's shoes, quickly to increase knowledge, become a DIY talent.   What motherboard does Q:DDR4 memory use?   A: no

SEED experiment: Buffer Overflow Vulnerability Experiment

describes how to set the zsh program: sudo sucd /binrm shln -s zsh shexit 3.2 shellcodeGenerally, a buffer overflow will cause the program to crash. in the program, the overflow data overwrites the return address. If the data that overwrites the returned address is another address, the program will jump to this address. If the address stores a piece of well-designed code for other functions, this code is shellcode.Observe the following code: #includeint main( ) {char *name[2];name[0] = ‘‘/bin/s

On the available characters of PHP variables

, \x66, \x67, \x68, \x69, \x6a, \x6b, \x6c, \x6d, \x6 E, \x6f, \x70, \x71, \x72, \x73, \x74, \x75, \x76, \x77, \x78, \x79, \x7a, \x7f, \x80, \x81, \x82, \x83, \x84, \x85, \x86, \x87, \x88, \x89, \x8a, \x8b, \x8c, \x8d, \x8e, \x8f, \x90, \x91, \x92, \x93, \x94, \x95, \x96, \x97, \x98, \x99, \x9a, \ x9b, \x9c, \x9d, \x9e, \x9f, \xa0, \xa1, \xa2, \xa3, \xa4, \xa5, \xa6, \xa7, \xa8, \xa9, \xaa, \xab, \xac, \xad, \xae, \xa F, \xb0, \xb1, \xb2, \xb3, \xb4

Talking about available characters of PHP Variables

, \x78, \x79, \x7a, \x7f, \x80, \x81, \x82, \x83, \x84, \x85, \x86, \x87, \x88, \x89, \x8a, \x8b, \x8c, \x8d, \x8e, \x8f, \x90, \x91, \x92, \x93, \x94, \x95, \x96, \x97, \x98, \x99, \x9a, \x9b, \x9c, \x9d, \x9e, \x9f, \xa0, \xa1, \xa2, \xa3, \xa4, \xa5, \xa6, \xa7, \xa8, \xa9, \xaa, \xab, \xac, \xad, \xae, \xaf, \xb0, \xb1, \xb2, \xb3, \xb4, \xb5, \xb6, \xb7, \xb8, \xb9, \xba, \xbb, \xbc, \xbd, \xbe, \xbf, \xc0, \xc1, \xc2, \xc3, \xc4, \xc5, \xc6, \xc

Apache Error !!! Help !!!

Apache Error !!! Help !!! -- Linux Enterprise Application-Linux server application information. For details, refer to the following section. Note: 10.50.10.45 indicates the firewall address. If you disable the firewall, the IP address of the Internet is displayed !!! The Error Log content is as follows: [Tue Mar 18 19:12:41 2008] [error] [client 10.50.10.45] request failed: error reading the headers [Tue Mar 18 19:12:42 2008] [error] [client 10.50.10.45] Invalid method in request \ xc9I; \ x9ez

Buffer Overflow Vulnerability test

/bin/bash. The following instructions describe how to set up the ZSH program:sudo sucd-s zsh shexit3.2 ShellcodeIn general, a buffer overflow can cause a program to crash, and in the program, the overflow data overwrites the return address. And if the data that overwrites the return address is another address, then the program jumps to that address, and if the address is a piece of well-designed code to implement other functions, this code is shellcode.Observe the following code:#include int mai

Chinese conversion inside code

Chinese is: Limited Conversion good is: \xe6\x9c\x89\xe9\x99\x90\xe5\x85\xac\xe5\x8f\xb8 Is there a ready-made function for PHP5? Please advise and recommend method Thank you Reply to discussion (solution) I haven't seen it in the core function library. Assemble it yourself: $s = ' limited '; $ens = ' \x '. Implode (' \x ', Str_split (Bin2Hex ($s), 2)); Var_dump ($ens); String ("\xe6\x9c\x89\xe9\x99

[Practice] WebDAV Remote Overflow Vulnerability Analysis

/x94/xd9/x8b/x94 "."/X5c/x1c/XAE/x94/x6c/x7e/xfe/x96/x97/x97/xc9/x10/X60/x1c/X40/Xa4 "."/X57/X60/x47/x1c/x5f/X65/x38/x1e/xa5/x1a/xd5/x9f/xc5/xc7/xc4/x68 "."/X85/XCD/x1e/xd5/x93/x1a/xe5/x82/xc5/xc1/x68/xc5/x93/XCD/Xa4/x57 "."/X3b/x13/x57/xe2/x6e/Xa4/x5e/x1d/x99/x13/x5e/xe3/x9e/xc5/xc1/xc4 "."/X68/x85/XCD/x3c/x75/x7f/XD1/xc5/xc1/x68/xc5/x93/XCD/x1c/x4f/Xa4 "."/X57/x3b/x13/x57/xe2/x6e/Xa4/x5e/x1d/x99/x17/x6e/x

Chinese conversion inner code

Chinese conversion inner code Chinese: Company Limited The conversion is as follows: \ Xe6 \ x9c \ x89 \ xe9 \ x99 \ x90 \ xe5 \ x85 \ xac \ xe5 \ x8f \ xb8 Is there any ready-made function in PHP5 for mutual conversion? Please inform and recommend methods Thank you. Reply to discussion (solution) I have never seen it in the core function library. I assembled it myself: $ S = 'company limited '; $ ens =' \ X '. implode ('\ X', str_

Near Number Solution

;}/*** Calculate the near number num2 under a positive number num1. num2 meets the following requirements:* (1) num2 * (2) the sum of num1 and num2 digits is equal (in decimal format );* (3) num2 is the maximum positive number that satisfies the (1) and (2) conditions.* @ Param num: the value of num1. For some special num values, there may be no corresponding number of neighboring values.* @ Return: if there is a number near the bottom, return the number near the bottom; otherwise, return-1.* @

Linux experiment--Buffer Overflow Vulnerability experiment

up the ZSH program:sudo suCd/binRM SHLn-s zsh SHExitFigure 62 ShellcodeIn general, a buffer overflow can cause a program to crash, and in the program, the overflow data overwrites the return address. And if the data that overwrites the return address is another address, then the program jumps to that address, and if the address is a piece of well-designed code to implement other functions, this code is shellcode.Observe the following code:#include int main (){Char *name[2];Name[0] = "/bin/sh";N

Linux experiment--Buffer Overflow Vulnerability experiment

up the ZSH program:sudo suCd/binRM SHLn-s zsh SHExitFigure 62 ShellcodeIn general, a buffer overflow can cause a program to crash, and in the program, the overflow data overwrites the return address. And if the data that overwrites the return address is another address, then the program jumps to that address, and if the address is a piece of well-designed code to implement other functions, this code is shellcode.Observe the following code:#include int main (){Char *name[2];Name[0] = "/bin/sh";N

How to see if the computer motherboard supports DDR4 memory?

What motherboard does Q:DDR4 memory use? A: not all motherboards support DDR4 memory, because the DDR4 is a new generation of memory, the motherboard and CPU are required, currently only a few newer CPUs and motherboards support DDR4 memory. About the DDR4 memory with what motherboards, this major need to be based on the CPU and motherboard selection, to consider. For now, the Intel platform only X99 motherboards, the latest 100 s

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