A group by can solve this query?

Can a group by solve this query? field a B C 1 2 3 2 3 2 2 1 5 5 3 4 3 5 3 3 4 7 4 3 6 Query out The 1, a, or B fields include 3 The combination of 2, A and B selects only one of the largest C values The last thing I wanted was, 2 3 2 5 3 4 3 4

PHPCMS V9 Related issues

Phpcms v9 Problems PHPCMS login always prompt "Verification code input error", clearly did not lose the wrong Solve Modify "/caches/configs/system.php"session_storage = ' MySQL 'ForSession_storage = ' Files ' and the domain name in the flow device

Comparison of Php is_callable and Method_exists methods

Comparison of Php is_callable and Method_exists methods Before sending an article about is_callable, mainly the translation of PHP manual, now is_callable and mehod_exists to do a comparison, deepen understanding: ? ? ? Compare content

Configuring the PHP environment on Windows

Configuring the PHP environment under Windows Phpnow in Windows configuration environment is very convenient, but the compatibility is not very good, and sometimes we need to manually configure the PHP environment in Windows, manual configuration

Ask a very tangled question about

Ask a very tangled question My database is a hit column in the Mysql,sale table, which is used to hold the number of user clicks If the initial value of hit in Sale table is 10 $num = Get Sale Table The value of the hit column is 10, and that's it.

How cookies are shared between different domain names

How cookies are shared between different domain names Title ------Solution-------------------- Cookies for different domain names cannot be shared. But you said if the first-level domain name is the same situation, it is possible. Set the cookie

Three types of PHP jump page

PHP three ways to jump pages PHP page Jump One, header () function The header () function is a very simple way to jump a page in PHP. The main function of the header () function is to output the HTTP protocol header (header) to the browser. The

Firefox firephp Development Environment equipped

Firefox firephp development Environment configuration ? PHP Development Relatedfirefox3.6Firebug 1.7.3firephp 0.5.0 $ ("#docDirId"). Val (selectNode.attributes.id); var options = { success: function (data) { $ ("#docDirName" ).

"Collection" PHP "Memcache Protocol"

"Rollup" PHP "Memcache Protocol" In the interview, was asked about memcache many aspects, found himself only know set,get is not enough, so re-organize Basic content Memcache-memcache class memcache::add-Add an entry to the cache server

Php+socket illustration

Php+socket Example Client//Set error handling error_reporting (E_all);//Set processing time set_time_limit (0); $ip = ""; IP address $port = 1000; Port number $socket = Socket_create (Af_inet, Sock_stream, sol_tcp); Create a socketif (

Using PHP to redeem common four kinds of sorting algorithms and implementation principle

Using PHP to implement four kinds of common sorting algorithms and its realization principle Insert sort (one-dimensional array)1, starting with the first element, the element can be thought to have been sorted2, take the next element and scan

Use PHP to modify configuration files

To modify a configuration file using PHP Http://www.phpweblog.net/kiyone/archive/2007/07/04/1432.html To modify the configuration file aaa.conf, the contents are as follows: [Username] Kiyone [Password] 123 [Class] Chass1 I want to modify the 123

PHP get Baidu Latest Event

PHP get Baidu Latest Event function Getbaiduhotkeyword () { $templateRss = file_get_contents (' http://top.baidu.com/rss_xml.php?p= Shijian '); If (Preg_match ('/ (. *) /is ', $templateRss, $_description)) { $templateRss =

PHP Base bit calculus

PHP Base bit operations PHP bit Operation $ A & $b and (bitwise AND) $a | $b or (bitwise OR) $a ^ $b Xor (Bitwise XOR) ~ $a not (bitwise non) $a > $b shift right (to move to) $ A & $b bitwise with $ A and $b A bit of 1 is set to 1; Example: & = 810

PHP Framework 3 (view)

PHP Framework Three (view) In the previous section we simply implemented the controller. In this section we implement a view. This view is very simple. The main use is Ob_start (), ob_get_content (); This file is located in the includes folder view.

Login page The question about the session

Login Page Session Problem Hello everyone, I'm coming again. My page is written like this: Session_Start (); if ($_session[' Admin '] = = ' | | $_session[' ID '] = = ') { Echo '; } ------------------------------------------------------ The problem

I feel so confused, little brother.

I feel so confused. PHP Code * Foo * CB * Tango * CC * Foo * CD * * what the hell?! :) */?> Is it covered, or what? Why output so ah, do not understand Ah, listen to chaos ah. ------Solution-------------------- What's it called?

Tokyocabinet/tokyotyrant Document Collection

PHP memcached and Ttserver Previously just use memcached do brush control, recently read some blog articles and some of the company's projects to deepen their understanding of a step, write a note. ? PHP provides Memcache and Memcached, as for

Weird events, array-related issues

Weird events, array problems PHP Code $list =array ([page] = = Array ([page_id] = 1, [path] = tiyee.html, [ Templates] = Zj001.tpl, [key] = 21212121,), [qianggou] = = Array ([obje CT_ID] = 1, [number] = 0, [Oldprice] = 0.00,

Regular, extract the video path, how to solve

Regular, extracting the video path such as String He could be a part of an article, and there's something at the end. I want to extract the above script from the red section above. Also want to extract the script inside the video parameters,

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