


Detailed explanation of php addslashes() function and stripslashes() function examples
What are the functions of the addslashes() function and stripslashes() function?
addslashes(): Add backslashes before certain predefined characters in the input string. This processing is for the needs of database query statements, etc. These predefined characters are: single quote ('), double quote ("), backslash (\), NULL.
stripslashes(): Remove the additions added by the addslashes() function backslash. This function is used to clean the data retrieved from the database or HTML form (if there are two consecutive backslashes, remove one and keep one; if there is only one backslash, remove it directly.)
ps: By default, the PHP command magic_quotes_gpc is on and addslashes() is automatically run on all GET, POST and COOKIE data. Do not use addslashes() on strings that have been escaped by magic_quotes_gpc. , because this will cause double-level escaping. When encountering this situation, you can use the function get_magic_quotes_gpc() for detection. Example:
if (get_magic_quotes_gpc()){
code....
}
Understanding their functions, let’s take a look at their syntax:
addslashes() function: before certain predefined characters in the input string Add backslash
Syntax:
addslashes(string)
Parameter details:
string Specifies the characters to be escaped String.
Example
The following example adds a backslash to the predefined characters in the string. The code is as follows:
<?php $str = "Who's Peter Griffin?"; echo $str . " This is not safe in a database query.<br>"; echo addslashes($str) . " This is safe in a database query."; ?>
Code operation Result:
##stripslashes(): Removes backslashes added by addslashes() function .
##Syntaxstripslashes(string)
string Specifies the string to be checked. Example
Remove the backslash, the code is as follows<?php echo stripslashes("Who\'s Bill Gates?"); ?>
[PHP video tutorial recommendation]:
《php.cn Dugu Jiujian (4)-php video tutorial
The above is the detailed content of Detailed explanation of php addslashes() function and stripslashes() function examples. For more information, please follow other related articles on the PHP Chinese website!

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

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

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

Alipay PHP...

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.

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,

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

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...

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.

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�...
