PHP Tutorials

PHP Functions: Empty () and isset () are all functions that determine whether a variable is configured, but there are some differences when using it. The empty () function is used to test whether a variable has been configured. Returns a value of

project development is unavoidable to create folders on the server, such as when uploading images of the directory, template parsing directory, and so on. This is not the current project to use this, so summed up a few loops to create a hierarchical

Recursion is an important programming technique. This method allows a function to invoke itself from within. An example is calculating the factorial. The factorial of 0 is specifically defined as 1. The factorial of a larger number is calculated by

This article mainly introduces PHP simple acquisition of random numbers of common methods, combined with examples of PHP implementation of the specified range of random number and the specified character sequence random number of simple

the Fileatime () function returns the last access time for the specified file. This function returns the last time the file was accessed. Returns False if an error occurs. Time is returned as a Unix timestamp. Grammar Fileatime (filename) FileName

If the site uses an infinite column structure, we can get all the columns of the site to form a tree structure. This article mainly introduces the knowledge of PHP generating infinite column tree. Has a good reference value. Under Column

The establishment of commercial sites or more sophisticated personal sites, often need to record visitors ' information, in PHP provides two convenient means: Session and Cookie function. In order to permanently maintain user information, Cookies

FFmpeg is an open-source computer program that can be used to record, convert digital audio, video, and turn it into a stream. Use the LGPL or GPL license. It provides a complete solution for recording, converting, and streaming audio and video. It

SVN is the abbreviation for Subversion, is an open source version control system, compared to RCS, CVS, it uses the branch management system, its design goal is to replace CVS. Many version control services on the Internet have migrated from CVs to

MySQL transaction is mainly used to deal with large-scale and high-complexity data. For example, in the Personnel Management system, you delete a person, you need to delete the basic information of the person, but also to delete the information

This article mainly introduces the PHP calculation date difference of days method, combined with examples of PHP date and time operation and conversion of the relevant skills, the need for friends can refer to the following This paper analyzes the

below to introduce you to the PHP data filtering 1. The basic principles of PHP submission data filtering 1) When committing variables into the database, we must use Addslashes () to filter, like our injection problem, a addslashes () will be done.

SWFUpload is a combination of flash and JS file upload plugin, it is very powerful, Features of SWFUpload 1, upload with flash, the page does not refresh, and can customize the style of flash button; 2. You can restrict the files to be uploaded on

In PHP, the session is often used to verify the user registration or after the authentication of the login, let me summarize some common examples of session variables and usage introduction When you run an application, you open it, make some

MySQL transaction is mainly used to deal with large-scale and high-complexity data. For example, in the Personnel Management system, you delete a person, you need to delete the basic information of the person, but also to delete the information

The Set_error_handler () function sets the user-defined error-handling function. Note: If you use this function, the standard PHP error handler is bypassed, and if necessary, the user-defined error program terminates the script through Die (). Note:

The output is garbled when the encoding of the PHP output is inconsistent with the header information declaration. PHP program development, the coding problem must have bothered a lot of people, such as: when we need to output GBK encoded string,

Session: In a computer, especially in a network application, it is called "conversation control." The Session object stores the properties and configuration information required for a specific user session. This way, when a user jumps between the

You can use subscript variables in your program, which means that the whole array of these variables is the same as the data type of each variable. when each element in an array has only one subscript, the array is called a one-dimensional array.

Random draw software is a can be used in any lottery application of the computer lottery software, the software one-click Lottery, and the use of random algorithms, to ensure fairness, you can use the random lottery software for the annual Meeting,