A regular expression that PHP determines whether the URL is legitimate

One '/^https tutorial//?. +. [A-z] {2,4}$/'; // '/^https//? +. [A-z] {2,4}/.*$/'; // '/^https?:/ /.+. [A-z] {2,4}/.*$/'; // '/^https?:/ /.+. [A-z] {2,4} (/.*|) $/i ' ///^http (s)?:/ /([a-za-z0-9.]? ([0-9a-za-z][0-9a-za-z-]+.) +[a-za-z]{2,5})

Classic PHP Paging Code and Paging principle (1/3)

Classic PHP tutorial pagination code and page-splitting principle1. Preface Paging display is a very common way to browse and display large amounts of data, one of the most frequently handled events in Web programming. For the veteran of Web

Several classic PHP page-paging programs (1/4)

function _pageft ($totle, $displaypg = $url = ') { Global $page, $firstcount, $pagenav, $_server; $globals ["displaypg"] = $DISPLAYPG; if (! $page)$page = 1;if (! $url) {$url = $_server["Request_uri"];}   //url Analysis:    $parse _url = Parse_

PHP Export data to CSV file

The code is as follows Copy Code Include (".. /admin/inc/inc.php ");$times = time ();$filename = $times. ". CSV ";$a = "contact person, contact telephone, community, required materials, notes, application Time";$days = Postget

Simple instance PHP verification code code

Verification code is a public fully automated program that distinguishes users from computers and people. In the CAPTCHA test, the computer that serves as the server automatically generates a problem to be answered by the user. This problem can be

Php Chain of Responsibility Chain mode

For example, when an atomic bomb is dropped, blood may be reduced for troops or buildings in the killing range. However, the damage degree varies with the distance from the central point, in addition, different types of weapons and damaged buildings

The correct way to get the file extension in PHP

For example: The code is as follows:Copy code Echo substr (strrchr ($ file_name, '.'), 1 ); Or The code is as follows:Copy code Echo end (explode (".", $ filename )); The most correct method is to use the pathinfo function, for example:

Example of php multi-thread development and application

PHP extensions: https://github.com/krakjoe/pthreadsPHP Manual: http://php.net/manual/zh/book.pthreads.phpAfter the extension is installed, you can use multiple threads to paste the following code that crawls the content of the Baidu online disk

How to use PHP to send emails via SMTP

PHP does not provide a ready-made smtp function, but provides a mail () function that is not very flexible. This function requires support on server configuration and does not support smtp verification, it is not recommended because it cannot work

PHP: The revolution is not yet successful. Java still needs to work hard.

Compared with the evolution trend of Java from simplicity to complexity, the persistence of PHP's loyalty to simplicity and original flavor has been welcomed by developers. In recent years, growth has soared, while simplicity is strength, this

Php socket communication mechanism instance description and code

I. What is socket?What is socket? socket is also called socket. It is used to describe IP addresses and ports and is a communication chain handle. Applications usually send requests to or respond to network requests through "sockets. To put it

Php paging functions

The code is as follows:Copy code $ Conn = mysql tutorial _ connect ("localhost", "root", "123456 ");$ Pagesize = 4; // set the number of records displayed on each pageMysql_select_db ("ly", $ conn );$ Rs = mysql_query ("select count (*) from lyb",

Php regular string external link code function

The code is as follows:Copy code Function deleteemptyarray ($ val){$ Links = '';If (is_array ($ val )) {Foreach ($ val as $ v =>$ _ v)  {If (! Empty ($ _ v [0])   {$ Links. = $ _ v [0]. '| ';   }  }  Return substr ($ links, 0,-1 ); }Else {Return

Php file Upload progress bar (1/3)

ImplementationGenerally, the following two methods are used to implement the upload progress bar through the php Tutorial:1. apc extension (The author is the founder of the php Tutorial, and php has joined apc extension since 5.2)2. pecl extension

Php automatically collects remote images with image addresses and saves them to the local device.

The code is as follows:Copy code Function my_file_get_contents ($ url, $ timeout = 30 ){If (function_exists ('curl _ init ')) {$ Ch = curl_init ();Curl_setopt ($ ch, curlopt_url, $ url );Curl_setopt ($ ch, curlopt_returntransfer, 1 );Curl_setopt (

Php image file Upload instance code

The code is as follows:Copy code php Tutorial image file Upload instance code The code is as follows:Copy code If ($ _ post){If ($ _ files ['file']) {$ Filename = $ _ files ['file'] ['type'];$ Newname require '111cn.net.gif ';If

Php static file generation class

Php Tutorial static file generation classDefined ('php tutorial X') or die (header ("http/1.1 403 not forbidden "));           Class include_createstatic{                            Private $ htmlpath = '';Private $ path = '';Public $ monthpath = '';

Php custom encryption and decryption program

PHP3 Cryption is a very easy-to-crack, insecure encryption function, and should not be a very important thing to use. Although encryption is good, it will not impede the rigorous test of the sophisticated cracking program.But try it... this is a

Php online file and folder compression instance code

Note that this PHP Tutorial file compression code is used to help zip.exe files, so we need to extract zip.exe compressed files.If (! IsSet ($ _ GET ['dirname']){Show_input_form ();}Else{// Check if emptyIf (empty ($ _ GET ['dirname']) {Hg_exit

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