PHP

PHP extension text processing-the difference between PCRE and POSIX regular expressions is from PHP 5.3.0, and POSIX regular expression extensions are discarded. There are some differences between POSIX regular expressions and PCRE regular

Encryption, as a security book, is usually a topic to be mentioned. The reason why I ignore the encryption problem in the main part of this book is that its usage is narrow, and developers should take a big look... Encryption As a security-related

This article introduces the php array pointer operation: To move an array pointer: Next () gets the value of the current element at the same time. The value of the current element is obtained when Prev () is up. Move End () to the last element unit

Password sniffing although attackers do not use network communication between your users and applications for access control, they must be aware that data exposure becomes more and more important, especially for authentication information. Use SSL...

Brute-force attack is an attack that does not use any special means to exhaust various possibilities. It is more officially called a brute-force attack-a variety of possible attacks. For access control, the typical... Brute force attack A

PHP's unlimited classification is important in both work and study. many people only know how to write, but do not know why. today we will explore his deep-seated principles. Concept The concept of php's unlimited classification is like a tree. the

Permanent login permanent login refers to the mechanism for continuous verification between browser sessions. In other words, users who have logged on today will still be logged on tomorrow, even if the user session between multiple accesses expires.

Command injection using system commands is a dangerous operation, especially when you try to use remote data to construct the command to be executed. If contaminated data is used, the command injection vulnerability is generated. Exec ()... Command

A particularly dangerous situation is when you try to use contaminated data as the leading part of dynamic inclusion: Code injection A particularly dangerous situation is when you try to use contaminated data as the leading part of dynamic

A backdoor URL indicates that resources that do not need to be directly called can be directly accessed through a URL. For example, the following WEB application may display sensitive information to login users: & lt ;? Php $ authenticat...

Source code exposure an important issue about inclusion is the exposure of source code. The main cause of this problem is the following common situation: l use the. inc extension l & amp ;... Source code exposure An important issue about inclusion

This article mainly introduces information about the communication between semaphores and shared memory in the basic knowledge of PHP process communication, if you have any need, you can refer to the next article, which mainly introduces the

HTTP request spoofing is a more advanced and complex attack method than spoofing forms. This gives attackers full control and flexibility. it further proves that they cannot blindly trust any data submitted by users .... HTTP request spoofing An

Spoofing form submission is almost as simple as making a fake URL. After all, form submission is only an HTTP request sent by the browser. Part of the request format depends on the form. The data in some requests comes from... Cheat form submission

As a security-aware developer, tracking data is the most important thing at any time. Not only do you need to know what it is and where it is, but you also need to know where it comes from and where it is going .... Tracking data As a

We usually use recursion to implement Infinitus classification. we all know that recursion is very inefficient. we recommend a Laravel extension package, etrepatbaum, to quickly enable your data model to support an Infinitely Polar tree hierarchy

This article mainly introduces the example code for php to implement base64 image upload. the detailed code is organized here, which has some reference value. if you need it, you can refer to it. The File Post Upload method is not used in this

This article mainly introduces the offline php task execution method, which has a good reference value. let's take a look at the code below with a small editor, and the main function Ignore_user_abort (true ); This function ignores that the

The example in this article describes how to implement multigraph Upload in PHP. Share it with you for your reference. The details are as follows: 1. you can delete an existing image. 2. there is a new button 3. click the Add button to jump out of

This example describes how php asynchronously writes content (images or content) on a remote link to a local device. Share this with you for your reference. The details are as follows: *** asynchronous remote link content (images or content) write