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XMLHttpRequestjavascript High-performance Ajax should consider data transfer techniques and data formats, as well as other optimization techniques such as data caching.First, request dataThe commonly used techniques for requesting data are XHR,

This article describes the PHP multiple file upload class. Share to everyone for your reference. Specifically as follows: Copy Code code as follows: /* PHP multiple File Upload class Modified: Linvo 2008-2-15 */ Class more_file_upload{

? if (Empty ($_get[' FileName ')) | | | empty ($_get[' Filedir ')) | | empty ($_get[' Fileid '])) { Echo ' '; Exit (); } $file _name=$_get[' FileName ']; $file _dir=$_get[' Filedir ']; $FileId =$_get[' Fileid ']; $file _dir = $file _dir. " /"; if (!

Copy Code code as follows: Local file, should be send to the client $local _file = ' test-file.zip '; filename that the user gets as default$download _file = ' your-download-name.zip '; Set the download rate limit (=> 20,5 kb/s)$download

Share to everyone php to judge upload file types of methods, we learn together. /** * Read the first few bytes of the file to determine the file type * @return String/function Checktitle ($filename) {$file =fopen ($fi Lename, "RB"); $bin

Sometimes it's not perfect. Some people may have saved some files, but he has changed the extension so that it is within our file type. The actual access is not displayed (because the extension does not match the contents of the file). Here's a PHP

Copy Code code as follows: /*====================================================== $FileName for file name, must pass $FilePath is the file path. Optional, can be a relative or absolute path Paths can only be made up of English and data,

Ob_start Ob_get_flush These functions are one of the caching techniques that reduce server pressure until project development is used to understand the confusing and cached concepts,These functions, such as Ob_start Ob_get_flush, are the techniques

The header () function sends the original HTTP header to the client. It is important to recognize that the header () function must be invoked before any actual output is sent (in PHP Tutorial 4 and later, you can use output caching to solve this

A simple php file download source code, although does not support the extension of the breakpoint, but can meet some common needs. PHP download file in fact with a tag can be implemented, such as magento-1.8.1.0.zip. But some browsers can recognize

/** Author Zhangzhaoyu 2012-9-13 2:28:18 **/ /** * * @param unknown_type $file _name * @param unknown_type $file _sub_path "xxx/xxx/" * */ function Down_file ($file _name, $file _sub_dir) { $file _path = $_server["Document_root"]. $file _sub_dir.

You do transport and development of children's shoes, will often encounter a problem, that is, someone in the office to download things, the speed of natural is pulled down, affecting everyone online, office. The same problem, if it appears on the

First, the principle. A camel looked at so much information, found that no matter what method, the principle is the same. is to use the program to read the corresponding data to replace the variables in the template, and then generate a static page.

The basic implementation is in the foreground page = users download every click, download the number of times add 1, and download the corresponding files to the local. The required HTML code The content in the HTML code, then need

1,ini_get:returns The value of the configuration option as a string on success, or a empty string on failure (read PHP teaching The value in the path. ini configuration file) 2,; Whether to allow the treatment of URL (like http://or ftp://) as

The example of this article summarizes the PHP file operation. Share to everyone for your reference, specific as follows: Common ways to manipulate files: Flie_put_contents (URL,STR); file_get_contents (URL); '; File_put_contents ($path,

? Header ("content-type:text/html; Charset=utf-8 "); $file _name=$_get[' name ']; True file name of the server $file _realname=urldecode ($_get[' real ']); The file name of the database UrlEncode encoded $file _dir= "upload/"; $file = fopen ($file

PHP Downloads remote server files automaticallyMaximum execution time in secondsSet_time_limit (24 * 60 * 60);if (!isset ($_post[' submit ')) Die ();Folder to save downloaded the files to. Must end with slash$destination _folder = ' temp/';$url =

We generally implement the download is to call the URL to download, but encountered IE can identify open files can not be used in this way, such as downloading a picture, HTML page, etc., then need to program to achieve, the following PHP code can

This tutorial is suitable for PHP programmers who are interested in caching SQL queries to reduce the load on database connections and execution, and improve script performance.OverviewMany sites use databases as containers for site data storage.