PHP

Public indicates global and can be accessed by external subclass inside the class; CopyCode The Code is as follows: Class test {Public $ name = 'janking ',$ Sex = 'male ',$ Age = 23; Function _ construct (){Echo $ this-> age. ''. $ this->

Knowledge Point introduction:1. Determine whether a file or directory has a bool Copy codeThe Code is as follows: file_exists (string filename) 2. Get the file nameCopy codeThe Code is as follows: basename (filepath) 3. open the fileCopy codeThe

Generate a QR code online using the api that generates a QR code online by google. The Code is as follows: Copy codeThe Code is as follows: QR code generation -www.jbxue.com $ Content = $ _ GET ['content']; $ Width = $ _ GET ['width']? $

PHP itself does not have multithreading, but it can produce the same effect by means of curves. For example, the asynchronous calling of multi-process mode is limited to the command mode. In addition, a simpler method can be used in Web programs,

When a Web server executes a PHP script, it sometimes takes a long time to return the execution result. The subsequent script takes a long time to continue execution. To execute the next operation without waiting for the execution result, you can

Php5.3 comes with php-fpm/Usr/local/php/etc/php-fpm.confPid = run/php-fpm.pidPid settings, var/run/php-fpm.pid in the installation directory by default, it is recommended to enable Error_log = log/php-fpm.logError log, var/log/php-fpm.log in the

Here we will introduce two good php collection tools. One is Snoopy and the other is simple_html_dom. There are many ways to collect data (in essence 2-3, others are derived). php can also directly collect data using several methods. However, out of

Summary of optimizing PHP code skills1. If a method can be static, declare it as static, and the speed can be increased by 1/4;2. The echo efficiency is higher than that of print. Because echo does not return a value, print returns an integer;3. Set

PHP unlimited classification, Google will find a lot of relevant information, the idea is more popular, but also a lot of use is that the classification table has at least three fields: id, pid, name, id auto-incrementing table category, pid is the

The binary method is used to check whether an array contains a certain element. It is compatible with positive and negative order. The code is implemented as follows: Copy codeThe Code is as follows: $ SearchValue = (int) $ _ GET ['key']; Function

Observer mode:Defines a one-to-many dependency between objects. When the status of an object changes, all objects dependent on it are notified and automatically updated. Observer class:1. Abstract topic role: the topic role stores all references to

Nginx CacheNginx has two caching mechanisms: fastcgi_cache and proxy_cache.Let's talk about the differences between the two cache mechanisms.Proxy_cache is used to cache the content of backend servers. It may be any content, including static and

Previously, I manually wrote a drop-down auto-completion function, which is simple to write. It only supports the mouse selection function and does not support keyboard selection. This function is used in many projects, so you need to do it

In the past, the object orientation was limited to the rote memorization model. After working for so long, it turned to be an experience for everyone to see.1. finalFinal: php5 adds a final keyword. If the method in the parent class is declared as

Factory mode: The factory class determines the type of production slice instance to be created based on the parameter.Factory class: A method class dedicated to creating other objects. That is, pay-as-you-go allocation. input parameters are selected

SetType-set the variable type Bool settype (mixed $ var, string $ type)Set the var variable type to type. The possible value of type is: • "Boolean" (or "bool", starting from PHP 4.2.0)• "Integer" (or "int", starting from PHP 4.2.0)• "Float"

Copy codeThe Code is as follows: // Http://www.jb51.net/article/23093.htm Function set_cache ($ name, $ value ){ // Set relative or absolute directories. Do not add "/" at the end "/" $ Cache_dir = "./cache "; // Set the extension $ Cache_extension =

Bool Assert(Mixed $ assertion [, string $ description])-check whether an asserted is FALSE Copy codeThe Code is as follows: assert_options (ASSERT_ACTIVE, true); // you can use the assert () function. Assert_options (ASSERT_WARNING, false); // no

The Code is as follows: Copy codeThe Code is as follows: // The observed abstract class Class Observed implements SplSubject { Protected $ _ name; Protected $ _ observers; // Instantiate to generate an observer objectPublic function _ construct (){$

Copy codeThe Code is as follows: function myErrorHandler ($ errno, $ errstr, $ errfile, $ errline ){ If (! (Error_reporting () & $ errno) {return ;} Switch ($ errno ){ Case E_USER_ERROR: Echo " My ERROR [$ errno] $ errstr "; Echo "error line: $