PHP

As we all know, PHP is already the most popular Web application programming language. But like other scripting languages, PHP also has several dangerous security vulnerabilities. So in this tutorial, we will look at some practical skills to avoid

This article introduces several methods for defining arrays in PHP. For more information, see The code is as follows: $ A = array ("Chinese", "", "Long Wang Ye", "Tibet autonomous region "); $ B [0] = "apple ";$ B [1] = "apple ";$ B [2] =

The following is a detailed analysis of the foreach function in php. For more information, see Foreach function (PHP4/PHP5) ForeachThe syntax structure provides a simple way to traverse arrays. ForeachIt can only be applied to arrays and

String encryption and decryption should be frequently used in data processing, but MD5 encryption is irreversible. Therefore, you can write an encryption and decryption function by yourself. I read a few different or implementation ideas on the

To generate a graphic verification code, you must use the phpGD library to generate it. in the INI file, find extensionphp_gd2.dll and remove the previous one. just restart the apache or iis environment and check whether your php library has been

The following describes how to configure a domain-name-based virtual host for apache on a local machine. if you need it, refer to Apache 1. open the httpd. conf file of apache and find# Virtual hosts # Include conf/extra/httpd-vhosts.conf This

Php is a good choice for people who have studied C and feel that php is too convenient and easy. However, in terms of variable scope, it is different from that in c. If it is difficult to do so, it will be quite depressing. we cannot find the cause

There are many articles on how to configure PHP on IIS6 on the Internet, but these methods are either poor performance or difficult to upgrade. The following method allows you to easily upgrade after the first configuration. Although the LAMP

For a long time, we have stored some infrequently modified data as files for calling. it seems that it is correct to directly read files, which is more efficient than Database query, in addition, the connection and disconnection time have not been

This article introduces the password processing method on the php login page. if you have any need, refer to elseif (! $ Model-> validatePassword ($ data-> password )) The code is as follows: Class XBaseModel extends CActiveRecord{/*** User

Sometimes we need to obtain the website record filing information, so we can use this thief program to obtain the information from 360. The code is as follows: // WebSite http://www.micxp.com Function miibeian ($ domain ){ $ Domain = base64_encode

The field content in the data table stores a comma-separated string with a maximum of 20 numbers and a maximum of 40. For example, a sequence of numbers such as 3, 24, 3, and 40. It is actually a field that stores multiple voting results. Now you

Exec () is a function used to execute shell commands. The following describes how to use its shell injection method to explain that using system commands is a dangerous operation, this is especially true when you try to use remote data to construct

PHP outputs all variables, constants, modules, functions, and classes of the current process. 1. get_defined_vars(PHP 4> = 4.0.4, PHP 5)-Get an array composed of all defined variables Array get_defined_vars (void) This function returns a

The str_replace () function is used to replace specified characters. you can use this function to filter sensitive characters. The code is as follows: /** * Security filter functions * * @ Param $ string * @ Return string */ Function

This article describes how to implement event listening in php and how to implement event listening in the code that triggers the instance program. It also provides a simple implementation by referring to jQuery's event binding idea. Main functions:

In php, there are many ways to merge simple arrays, but today I want to merge arrays again based on the array ID, we only need to use array_merge to merge the simplest array operations by category. Array_merge () combines two or more arrays. the

There are various ideas about how to ensure that data filtering cannot be bypassed. today, let's take a look at PHP Data filtering, which will certainly help you. At the beginning of the guide, we said that data filtering in any language and

This article mainly introduces a simple example of PHP string connection. if you need a simple example, you can refer to it. many times we need to connect several strings to display them. in PHP, use "points" to connect strings, that is, periods in

Php uses the fsockopen method to obtain the header information. If an image is requested, the Content-Length indicates the image size. if you want to obtain the size of a remote image, A common practice is to retrieve the content of a remote image