PHP Tutorials

Session Hijacking The most common attack method for a session is session hijacking. It is the generic term for all the means that an attacker can use to access other people's sessions. The first step in all of these techniques is to obtain a

File name manipulation In many cases, dynamic inclusion is used, where the directory name or part of the file name is stored in a variable. For example, you can cache some of your dynamic pages to reduce the burden on your database server. In

File system spanning No matter how you use the file, you have to specify a filename somewhere. In many cases, the file name is used as a parameter to the fopen () function, and the other function invokes the handle it returns: When you use

This article mainly introduces the Zend framework of the command line based on the establishment of ZF project method, a more detailed analysis of the use of command line to establish the ZF project specific procedures and related considerations,

Violent attacks A violent attack is an attack that uses no special means to exhaust all possibilities. Its more formal term is the exhaustive attack-the attack of the various possibilities. For access control, a typical brute force attack manifests

Sometimes we want to collect user input through batch mode. That is, users can enter information for multiple model instances and submit them once. We refer to this as tabular input (tabular input) because these entries are usually rendered as HTML

YII uses a model-view-controller (MVC) design pattern that is widely used in WEB development. The goal of MVC is to separate the business logic from the considerations of the user interface, so that developers can change each part more easily

This article mainly describes the PHP implementation of the migration of the group is empty or a value element of the method, involving PHP using Array_filter Filter array of related operations skills, the need for friends can refer to the following

This article mainly introduces PHP using DOM and simplexml to read XML document method, combined with instance form analysis PHP using DOM and simplxml for XML file creation, loading, reading and other related operations skills, the need for friends

php zip file comparison class, compare the contents of two zip files, return new, delete, and the same file list. Only one layer is supported for the time being. requirement: upload a zip file with many picture files inside the zip. A series of

1. Concurrent access restriction issues For scenarios where concurrent access is restricted to the same user, users can request multiple requests successfully if the user requests multiple times and the server handles no lock limit. For example,

1. Do not use the Mysql_ function This day has finally come, and since then you are not only "shouldn't" use the Mysql_ function. PHP 7 has removed all of them from the core, meaning you need to migrate to a much better mysqli_ function, or a more

1. Prevention of cross-site scripting attacks Cross-site scripting attacks (XSS), the Web app collects user data from users. Attackers often inject javascript,vbscript,activex,html or flash into vulnerable web apps to confuse visitors to gather

YII provides a flexible and extensible logging capability. Logged logs can be categorized by log level and information classification. By using the level and classification filters, the selected information can be further routed to different

This article mainly introduces the YII2 implementation of cross-MySQL database association query sorting function example, with a certain reference value, interested in small partners can refer to. Background: On a MySQL server (note: Two databases

In PHP, there are many string functions, such as to filter the string ending the space, and then find its length, the general wording is: Strlen (Trim ($STR)) If you want to implement a similar link in JS, such as the following should be how to

In Redis we often use set,get and other commands, careful you have not found, there are a few similar commands called Setbit,getbit, what are they used to do? What is bitmap? is to represent the value or state of an element by a bit, where the

Front-end Code Controller: Define an array, set some parameters related to the upload $config [' upload_path '] = './uploads/';//Set Allow upload of type $config[' allowed_types '] = ' gif|jpg|png '; $config [' max_size '] =

First modify the configuration file (config.php) Generates a random, non-repeating string of bits encrypted key saved to config.php Encryption_key $config[' encryption_key ']= ' bf363d0a '; Load Session Class $this->load->library (' Session

Base64 encryption of different or string encryption methods Encryption function encode ($str, $key) { $res = Base64_encode ($STR); $code = $res ^ $key; return $code;} Decrypt function decode ($STR, $key) { return Base6