Community
Learn
Tools Library
AI Tools
Leisure
search
English
Home Backend Development PHP Tutorial Detailed analysis and explanation of php addslashes function_PHP tutorial

Detailed analysis and explanation of php addslashes function_PHP tutorial

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
Jul 21, 2016 pm 03:45 PM
php str string content function analyze detailed grammar illustrate

Syntax: string addslashes(string str);
Content description
This function adds slashes to the quoted part of the string that needs to be processed by the database, so that the database query can operate smoothly. The characters that will be changed include single quotes ('), double quotes ("), backslash () and the null character NUL (the null byte).
============ ================================================== ==
1, the performance of addslashes in form submission first depends on the value of get_magic_quotes_gpc(), which is usually 1. At this time, the content submitted from

echo get_magic_quotes_gpc().
" A ".$_POST['message'].
" B ".stripslashes($_POST['message' ]);
?>



Input: include('/home/me/myfile');

Output: 1 A include('/home/me/myfile'); B include('/home/me/myfile');
Summary: When get_magic_quotes_gpc() is equal to 1, if you do not enter the database, then you get The result is with a slash.

2, the performance of addslashes when submitting to the database.
Example:


Copy the code
The code is as follows: test



require_once('includes/common.php');
$db->query("INSERT INTO `testtable` ( id , content ) VALUES ('1' , '".$_POST['message']."')");
$query=$db->query("select * from `testtable` where `id` = 1;");
$Result=$db->fetch_array($query);
echo get_magic_quotes_gpc().
" A ".$_POST['message'].
" B ".$Result['content'];
?>



Input: include('/home/me/myfile ');
Output: 1 A include('/home/me/myfile'); B include('/home/me/myfile');
Summary: When get_magic_quotes_gpc() is equal to 1, if After entering the database, when you read it directly from the database, you can get the input string without making any modifications.

3, get_magic_quotes_gpc()

The settings of get_magic_quotes_gpc() on the server cannot be modified at runtime. In other words, you must consider different situations in advance in your web page code. Otherwise, when you submit the data, you still don’t know whether the server added a slash to you. The following two popular functions on the Internet may be what everyone needs. I personally like the second one: PHP code:


Copy code
The code is as follows: function my_addslashes( $message ){
if(get_magic_quotes_gpc()== 1 ){
return $message;
}else{
if(is_array($message) ==true){
while(list($key,$value)=each($message)){
$message[$key]=my_addslashes($value);
}
return $message;
}else{
return addslashes($message);
}
}
}


PHP code:


Copy code
The code is as follows:function my_addslashes($data){
if(!get_magic_quotes_gpc()) {
return is_array($ data)?array_map('AddSlashes',$data):addslashes($data);
} else {
Return $data;
}
}


The simple explanation is that if get_magic_quotes_gpc() is equal to 1 (the server default setting is 1), then our string can be directly stored in the database without modification. Otherwise, we use the addslashes function.

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/320351.htmlTechArticle Syntax: string addslashes(string str); Content description: This function removes quotation marks in the string that needs to be processed by the database. Add slashes to the part to allow database query to operate smoothly. This...
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

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Show More

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Assassin's Creed Shadows: Seashell Riddle Solution
2 weeks ago By DDD
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
WWE 2K25: How To Unlock Everything In MyRise
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Show More

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)

Show More

Hot Topics

Where is the login entrance for gmail email?
7495
15
CakePHP Tutorial
1377
52
What is the format of the account name of steam
77
11
win11 activation key permanent
52
19
nyt connections hints and answers
19
51
Show More
Related knowledge
PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

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

Discuss CakePHP Discuss CakePHP Sep 10, 2024 pm 05:28 PM

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

CakePHP File upload CakePHP File upload Sep 10, 2024 pm 05:27 PM

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

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

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

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

CakePHP Quick Guide CakePHP Quick Guide Sep 10, 2024 pm 05:27 PM

CakePHP is an open source MVC framework. It makes developing, deploying and maintaining applications much easier. CakePHP has a number of libraries to reduce the overload of most common tasks.

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

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,

See all articles