PHP Tutorials

Today there is a problem with a math problem, 4x+1/x=2, how much is x. To convert the equation, 4x2 + 1 = 2x, and then 4x2-2x + 1 = 0, is actually a one-yuan two-time equation problem. Long time did not get these things, mathematics are also high

Want to know how much memory is required to write PHP scripts? It's easy to use PHP directly to see the function memory_get_usage () that is currently assigned to the PHP script's memory. The following are examples of use: '; 313864$tmp = str_

Session.save_handler = Files 1. Session_Start () Session_Start () is the beginning of the session mechanism, it has a certain probability to turn on garbage collection, because the session is stored in the file, PHP itself garbage collection is

The double-colon operator, the scope-scoped operator, scope Resolution operator can access properties and methods overridden in static, const, and class. Used outside of the class definition, called with the class name. In PHP 5.3.0, you can use

The API provided by Sina Weibo is in JSON format, we write a PHP script to convert it into an array and publish it to our website like a form. This requires PHP to simulate the form's post action, and using the Curl Library makes it easy to

The picture is too big and the specification is not unified, the display control needs to rely on the JavaScript to complete, uses on the mobile device to display the result is not good and the traffic is huge, needs to carry on the processing to

The principle of automatic loading is the zend_application instance of Zend_loader_autoloader, making it call the Spl_autoload_register (array (__class__, ' autoload ')); This will call the AutoLoad method of this object to process if the class is

Although PHP comes with a powerful library of functions, in many cases, we also have to write our own custom functions to implement certain functions and requirements. The following collection of some more practical, to solve some of the common

In this program, two classes are created, one is the generic product class, it encapsulates the properties of one product and product, and the other is the cart class of the shopping cart. Product Class (product.php) The commodity class has three

An alternative to the Parse_url () function seen on the official web site of PHP. The result is similar to the Parse_url () function, and is implemented using a regular. URIs are every resource available on the Web-HTML documents, images, video

Zend_controller is the basis for building a site using the MVC pattern. The Zend_controller system is a lightweight, modular and extensible system. It only provides the most essential part of the core, allowing developers a great freedom to build

There is a requirement: when generating files, because many users have permission to build, to prevent concurrency, resulting in the resulting error, need to lock the generated process, only allow a user to operate within a time, this time need to

Register_globals is a configuration in php.ini that affects how PHP receives the arguments passed in, if your question is: why can't my form pass data? Why can't my program get the variables passed over? Wait, then you need to read the following

String interception is a very common programming task, and often a string interception with Chinese is often used. Although not difficult, but write their own function implementation and time-consuming, here is a more useful string interception

Each computer language has its own automatic garbage collection mechanism, so that programmers do not have to be overly concerned about program memory allocation, PHP is no exception, but in object-oriented programming (OOP) programming, some

Unlike other languages, PHP is not a strict type language. Basically, this means that the developer does not have to explicitly set the type of the variable (number, String, Boolean) before using a variable. Instead, the PHP interpreter

Information call tag with Template: [Universal label] (Ecmsinfo) Tag name: Information call label with template (Sys_getecmsinfo) Format: [ecmsinfo] Column ID, display number, title interception number, whether to display the column name,

PHP background may not be silent, I believe that you choose a language, not to see its background and a long history, more important is to see its practicality, flashy language even if it is a glorious history, will step to the decline, it is

JSON (JavaScript Object Notation) is a lightweight data interchange format. In brief, both XML and JSON are used to facilitate the transfer of data between client and server, especially for object-type data, such as the most common arrays. The

In the previous article, we introduced some cases of the header () function in PHP, and add it here. The following is a detailed description of the use of the header function: Regardless of how many headers the page has, it executes the last one,