Home Backend Development PHP Tutorial PHP在引号前面添加反斜杠(PHP去除反斜杠)_PHP

PHP在引号前面添加反斜杠(PHP去除反斜杠)_PHP

Jun 01, 2016 am 11:59 AM

一般空间商提供的服务器空间默认PHP 指令 magic_quotes_gpc是on的,也就是打开的。这时候就可以用stripslashes() 函数删除自动添加的反斜杠。用法就是:比如包含字符串的变量是$str,那么就用stripslashes() 函数处理一下这个字符串:stripslashes($str),输出的结果就是去掉反斜杠的。

如果遇到输出的结果中包含反斜杠的,可对输出内容用stripslashes()函数处理一下,即$str=stripslashes($str),保存即可将输出内容中包含的反斜杠去掉。

但是又存在另外一个问题,那就是因为本地PHP 指令 magic_quotes_gpc是off的,如果用这个函数的话,就会把本来正常的反斜杠也去掉了。这样就不是我们所希望的了。

解决办法就是可以使用函数 get_magic_quotes_gpc() 进行检测,如果是打开的状态,那么就去除反斜杠,如果是关闭的状态,则不去除反斜杠。

程序代码如下:

复制代码 代码如下:
 $str=$_POST["str"];           //读取str的内容赋值给$str变量
 if(get_magic_quotes_gpc()){   //如果get_magic_quotes_gpc()是打开的
     $str=stripslashes($str);  //将字符串进行处理
 }

本文于2012年4月25日10:08:03修订如下:

下面介绍三种方法解决这个问题:

1、修改PHP配置文件php.ini
 
这种方法只适于自己有权管理服务器的情况下,如果用的虚拟空间,那就只能采用后两条方法。

在PHP配置文件php.ini中将magic_quotes_gpc、magic_quotes_runtime、magic_quotes_sybase全部设为off。如下所示:

复制代码 代码如下:
magic_quotes_gpc = Off
magic_quotes_runtime = Off
magic_quotes_sybase = Off

2 利用.htaccess文件
 
该方法只在服务器支持htaccess的情况下,现在的服务器一般都会支持的

在程序目录下.htaccess文件中增加下面一句:

php_flag magic_quotes_gpc Off

3 在代码中屏蔽
 
该方法是移植性最强的,不用考虑服务器的配置,只要支持PHP就可以使用。

在所有PHP文件开始处增加下面代码

复制代码 代码如下:
 if(get_magic_quotes_gpc()){
     function stripslashes_deep($value){
         $value=is_array($value)?array_map('stripslashes_deep',$value):stripslashes($value);
         return $value;
     }
     $_POST=array_map('stripslashes_deep',$_POST);
     $_GET=array_map('stripslashes_deep',$_GET);
     $_COOKIE=array_map('stripslashes_deep',$_COOKIE);
     $_REQUEST=array_map('stripslashes_deep',$_REQUEST);
 }

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

How does session hijacking work and how can you mitigate it in PHP? How does session hijacking work and how can you mitigate it in PHP? Apr 06, 2025 am 12:02 AM

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

Describe the SOLID principles and how they apply to PHP development. Describe the SOLID principles and how they apply to PHP development. Apr 03, 2025 am 12:04 AM

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

How to debug CLI mode in PHPStorm? How to debug CLI mode in PHPStorm? Apr 01, 2025 pm 02:57 PM

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

How to automatically set permissions of unixsocket after system restart? How to automatically set permissions of unixsocket after system restart? Mar 31, 2025 pm 11:54 PM

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

How to send a POST request containing JSON data using PHP's cURL library? How to send a POST request containing JSON data using PHP's cURL library? Apr 01, 2025 pm 03:12 PM

Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...

See all articles