PHP

Php Binary Search example Binary Search is commonly written in recursion and non-recursion. When looking for the value, you can use interpolation instead of the median method.When the data in an ordered array increases evenly, the algorithm

After VPS is installed in Web runtime environments such as LNMP, some cache extensions will be selected for installation to speed up PHP running, what are the differences between eAccelerator, memcached, xcache, and Alternative PHP Cache? What are

I wrote three php quick sorting examples. The first is low efficiency, but the simplest and easiest to understand. The second is the one-way Traversal method provided in the introduction to algorithms, the third type is the bidirectional Traversal

I. File System SecurityIf php has the root permission and allows the user to delete files in the script, the user submits data and does not filter the data. Therefore, it is very likely to delete system files. // Delete the specified object from the

This article mainly introduces the example of using reflection to insert objects in php. For more information, seeThe Code is as follows:/*** insert insertModel () and use reflection, slightly less efficient * @ param class $ model object * @ param

The scope of variables in PHP can be divided into: Super global (special type of global variables, which can be directly used in a local range), global, local, static (special type of local variables)In PHP, global variables are actually static

What are the common methods to clear memcache items? Killing and restarting? What if I need to restart n apsaradb for memcache instances? One by one? For example, if memcached runs on the local port 11211, run the following command:$ Echo

Today, I encountered a problem with getJSON. The callback function has been unable to be executed and the format of the generated json data is absolutely correct. The js Syntax of getJSON is also correct, but alert does not return the data. It turns

Solve two problems:1. Text data such as ID cards is automatically converted into scientific notation.2. Chinese garbled characters How excel exports data from a Web page. When we send the data to the client, we want the Client Program (browser) to

Isset(PHP 3, PHP 4, PHP 5) Isset -- check whether the variable is set DescriptionBool isset (mixed var [, mixed var [,...])If var exists, TRUE is returned; otherwise, FALSE is returned. If unset () is used to release a variable, it will no longer be

1. install PHP2. Go to the ext directory under the PHP download and decompress directory.# Cd/root/php-5.3.6/ext#./Ext_skel -- extname = hmcNote:./Ext_skel -- extname = module_nameModule_name is the name of the extension module you can choose, for

Due to the display effect of some special characters, we had to change the used UTF-8 project to GBK. Because of the ajax technology, it also involved the old problem-encoding conversion. Some form verification needs to return json data. php's

Copy codeThe Code is as follows:/*** Insert insertModel (), which is less efficient by reflection.* @ Param class $ model object* @ Param bool $ is_returnLastInsertId whether to return the Add ID* @ Return int: whether the return value is successful

Copy codeThe Code is as follows:$ Page = isset ($ _ GET ['page'])? $ _ GET ['page']: 0; // starts from scratch$ Imgnums = 10; // number of images displayed on each page$ Path = "upload"; // saved directory of the image$ Handle = opendir ($ path );$

I wrote an article about the high-performance PHP Image Dynamic cropping solution a long time ago. The article uses nginx Cache and rewrite for implementation. Of course, with CDN, one problem with that solution is that images are not actually

Example: letters, numbers, and Chinese characters The Code is as follows: If (preg_match ("/['.,:;*?~ '! @ # $ % ^ & + =) (<>{}] | [|/| \ | "|/", $ User )){Echo 'do not enclose some special characters in the name. Please only

I. Introduction to CodeIgniter ManualThe second segment of URI determines the method in the controller. CodeIgniter allows you to use the _ remap () method to abolish this rule:Copy codeThe Code is as follows: public function _ remap (){// Some code

First: use regular expressionsCopy codeThe Code is as follows: Echo preg_replace ('#', '', 'AB ');// Output "abab"?>Method 2: Use the str_replace () functionCopy codeThe Code is as follows: Echo str_replace ('','', 'AB AB ');// Output "abab'?>Third:

Use Nginx as the proxy server, and set the backend to apache2. the maximum size of files uploaded is MB.1. Nginx Configuration:Http {......Client_max_body_size 100 m;......}2. PHP configuration file......; Maximum execution time of each script, in

Command class:1. Command role: declares an abstract interface for all specific command classes. This is an abstract role.2. Specific command role: defines the weak coupling between a receiver and behavior; implements the execute method and is