what is in php

Learning Regular Expressions in php and learning Regular Expressions in php Syntax format:Between the delimiters. 1 Common metacharacters include "+", "*", and "?". Where, The "+" metacharacter specifies that its leading character must appear one or

A simple counter written in php and a simple counter written in php Php has extremely powerful image processing capabilities and can be used to dynamically generate web Images easily.Here is a simple counter made of php.1. Overall Thinking:Records

Php deletes a cookie. Php: How to delete a cookie; how to delete a cookie in cookiephp: How to delete a cookie in php -- boolsetcookie (stringname [, stringvalue [, intexpire [, str php: How to delete a cookie, delete cookie in php Php effective

Analysis of methods for clearing and destroying sessions in php, and clearing and destroying sessions in php This document describes how to clear and destroy a session in php. Share it with you for your reference. The specific analysis is as

#测试网址: http://localhost/blog/testurl.php?id=5Get domain name or host addressecho $_server[' Http_host ']. " "; #localhostGet web Addressecho $_server[' php_self ']. " "; #/blog/testurl.phpGet URL parametersecho $_server["Query_string"]. " "; #id =

A simple example of adding data to an xml file in php, and adding an xml file in php Xml file: stu. xml: Zhang San 80 90 70 Li Si 60 90 75 The above file stu. xml provides some student data. Now you need to add a zongfen

What is the difference between die and exit in php? The two seem to both terminate the program execution, and it seems that there is no difference indeed. some people say that they can take a bubble before they die, but they will not. after reading

Multithreading in php and multithreading in php Use the Socket method of php to implement multithreading of php programs. Php itself does not support multithreading. How can we implement multithreading in php? The WEB server itself supports multiple

About Trait in PHP and Trait in PHP Today, let's look at the PHP framework and see the Trait section. I have never seen it. I checked it out with curiosity. The PHP manual describes how to solve the problem of multi-inheritance. However, in an

Summary of several methods for clearing cache in PHP and several methods for caching in php Summary of several methods for clearing cache in PHP Currently, the development project uses tp3.1. during the development process, we often encounter page

Description of the types of new features in php 7, and description of new features in php Preface PHP 7 makes it possible to declare a type. PHP 7 supports the following types of parameter types: Integer Floating Point Type String type

A variable in PHPVariables in 1.PHP, declaration and use must start with $2.PHP is a weakly typed language, and variables do not actually need to be declared. You can assign any type of value directly to a variable;You can declare multiple variables

Reference URL: http://www.jb51.net/article/29949.htmThe most efficient of these three methods is the use of a foreach statement to iterate over an array. The foreach structure has been introduced since PHP4, which is a statement designed

PHP is a very popular open source server-side scripting language, and most of the sites you see on the World Wide Web are developed using PHP. However, you are probably surprised to notice that a small number of people swear to be far away from PHP.

Arrays are often used in PHP, PHP's array is powerful, and fast, read and write can be done in O (1), because it is the size of each element is consistent, as long as you know the subscript, you can instantly calculate its corresponding elements in

In PHP, the symbol "&" represents a reference. 1, see what does not refer to this: $a   = "Hello world";//define a variable, the following assignment to $b $b = $a;//This step does not precede $a with a symbol Like this "$b = & $a". No Plus, in

In PHP, there are some simple image functions can be used directly, but most of the images to be processed, you need to compile PHP in addition to the GD library. In addition to installing the GD library, additional libraries may be required in PHP,

Programming | Object polymorphism Polymorphism is defined as the ability of an object to invoke that method when an object is passed as a parameter at run time. For example, a class that defines the method "draw", inherits the class to redefine the

Data research tool for solving defects of output and probability functions The 1th part of this article series refers to the missing three elements in the simple linear regression (Linear regression) class. In this article, the author Paul Meagher

Author: Zhu Xianzhong compilation 　　 Summary:This article will discuss the concept of polymorphism and its application in object-oriented design, and will also analyze how to use polymorphism in PHP 5 and its advantages and disadvantages.Support