


PHP webpage prevention method configuration for SQL injection_PHP tutorial
The prerequisite is that we need to have administrative rights on the server, that is, we can modify the php.ini file. Now I will introduce the method of modifying the php configuration file to prevent SQL injection. Friends who need to learn can refer to it.
For security reasons, you can turn on the safe mode of the "php.ini" file and set "safe_mode=On"; if the "display_erros" option that displays PHP execution error information is turned on, a lot of exploitable information will be returned to the intruder , so set it to "display_erros=off"; in this way, the information after the PHP function execution error will not be displayed in the client's browser.
In addition, there is a very important configuration option in the file. If the "magic_quotes_gpc" item is set to "On", the PHP program will automatically change the variables submitted by the user to include "'", """, "" is automatically converted to an escape character containing a backslash. This option is similar to the parameter filtering in the ASP program and can prevent most character injection attacks.
This program is great if you don’t have server management rights
The code is as follows
|
Copy code | ||||
private $getfilter = "'|(and|or)b.+?(>|<|=|in|like)|/*.+?*/|
* Constructor
*/
public function __construct() {
foreach($_GET as $key=>$value){$this->stopattack($key,$value,$this->getfilter);}
foreach($_POST as $key=>$value){$this->stopattack($key,$value,$this->postfilter);}
foreach($_COOKIE as $key=>$value){$this->stopattack($key,$value,$this->cookiefilter);}
}
/**
* Parameter check and log writing
*/
public function stopattack($StrFiltKey, $StrFiltValue, $ArrFiltReq){
if(is_array($StrFiltValue))$StrFiltValue = implode($StrFiltValue);
if (preg_match("/".$ArrFiltReq."/is",$StrFiltValue) == 1){
$this->writeslog($_SERVER["REMOTE_ADDR"]." ".strftime("%Y-%m-%d %H:%M:%S")." ".$_SERVER["PHP_SELF"] ." ".$_SERVER["REQUEST_METHOD"]." ".$StrFiltKey." ".$StrFiltValue);
showmsg('The parameters you submitted are illegal, the system has recorded your operation!','',0,1);
}
}
/**
* SQL injection log
*/
public function writeslog($log){
$log_path = CACHE_PATH.'logs'.DIRECTORY_SEPARATOR.'sql_log.txt';
$ts = fopen($log_path,"a+");
fputs($ts,$log."rn");
fclose($ts);
}
}
?>
http: //www.bkjia.com/PHPjc/629633.html

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

In this chapter, we will understand the Environment Variables, General Configuration, Database Configuration and Email Configuration in CakePHP.

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

To work with date and time in cakephp4, we are going to make use of the available FrozenTime class.

To work on file upload we are going to use the form helper. Here, is an example for file upload.

In this chapter, we are going to learn the following topics related to routing ?

CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

Validator can be created by adding the following two lines in the controller.
