A database design problem with multiple values for a field

There is now field a. The value is single, for example, the value is 3 There is a field that takes multiple values. For example, field B, the value may be 1, 2, 3, 4 Now you want to find out all records that contain the value of field a. Like what:

A function of deleting an element value in an array on the net, can not understand, who will guide me?

Array functions See on the net a function that deletes the value of an element in an array is written like this: function Array_remove_key ($array, $keys) { $num = count ($keys); $num _last = $num-1; $this _array_0 = & $array; $last

Advantages and disadvantages of PHP framework development API

Seek expert analysis, PHP framework development API advantages and disadvantages. such as the domestic popular TP framework Reply to discussion (solution) The advantage is convenient, if you build a site from scratch. There's just too much to

I'd like to ask you a question about Php+mysql character encoding.

Want to set up the site to UTF8, check a lot of information, the truth also understand, the page, program, database character encoding unified together. The truth is clear, do not know how to do. Web server space rented by someone else, MySQL

How to improve the site's access and articles collected it?

Self-developed a small website, added some articles, but do not know how to make more people to visit their website, and how to get a higher Baidu included? I hope my friends can give a weapon, brother thank you Website Domain name:

PHP export download Excel file is blocked by IE, how to solve? Not with stream output!

Download Excel file is blocked by IE, how to solve? When the export button is clicked, an Excel file is generated in the background via Ajax, and you want the dialog box to appear directly on the page to save the file. Either through the JS

Does the HTTP status code affect the content of the browser display?

For example, when a server sends a response with an undefined status code and status message, what is the specific behavior of the browser? Reply to discussion (solution) You can try it, it's not hard to write a statement.Browsers generally can

PHP Strange Code (hack), Master in (50 points)

PHP hack PHP Programming code obfuscation $O 00oo0=urldecode ("%6e1%7a%62%2f%6d%615%5c%76%740%6928%2d%70%78%75%71%79%2a6%6c%72%6b%64%679%5f%65%68%63%73%77 %6f4%2b%6637%6a "); $O 00o0o= $O 00oo0{3}. $O 00oo0{6}. $O 00oo0{33}. $O 00oo0{30}; $O 0oo00

How do I use Add-ons inside Firefox?

Firefox Web regex Firefox has an add-on HTML Regex extractor component, the function is very powerful, which grabs the station, but how to use it exactly? For example, I opened a TV drama website, there are many TV dramas, how to search for the page

Php?mysql's??

Such as? Want to be in?? Mysql_result.php?? In addition to the user?? What is the function of the secret? He changed the following?,? he can??? [? except] ?? Super??, can get rid of the value of that line. ?? What are you going to do?

Does PHP use regular expression strings, just want to keep the first one to do?

Php For example, there are many ASD for this string, there are several consecutive, there are just one, But I want to keep only the first ASD, and all the ASD in the back are erased. (on the basis of not affecting other characters)

Why does curl or file_get_contents collect URLs when the K-number is too high to get?

Prior to http://bbs.csdn.net/topics/390572750 learned the way to obtain, but some links are as follows: Http://www.autohome.com.cn/77/options.html Http://www.autohome.com.cn/59/options.html are available for normal access But the following

Zend Guard Select obfuscation type cannot run issue

My PHP source code has been Zend encrypted. If you do not tick any of the obfuscation type, the encrypted file will work. But you can't run as long as you choose one of the obfuscation type. What's going on? If you do not add this, the code can

Urgent!!! Hidden path Issues

URL html Let me give you an example http://wenku.baidu.com/view/a4cee123de80d4d8d15a4fba.html 1. This is an address in the Baidu library, I want to know how to get out of A4CEE123DE80D4D8D15A4FBA. 2. Review elements-Download button, This code hides

SVN uses the hook file to update the file to the Web directory, prompting ' skipped/var/www/nginx/html '

SVN uses the hook file to update the file to the Web directory, prompting ' skipped/var/www/nginx/html '? Hurry, Hook file Post-commit Code Web=/var/www/nginx/html SVN update $WEB--username ' Zhangsan '--password ' Lisi ' Reply to discussion

"100" How to Download 2.4.3 version from Apache official website?

Has come to this step: http://httpd.apache.org/download.cgi But the three-link download-back package is a text document, how to download the Apache 2.4.3 Win32 X86 version? Reply to discussion (solution) Apache HTTP Server 2.4.3 (httpd): 2.4.3

PHP Development Phone 3G page, questions ask Prawn

This post was last edited by u010337219 on 2013-08-30 15:22:17 Mobile PHP Asynchronous Ajax 3g1. Web page implementation automatically adapt to the resolution of the phone 2. The website can identify whether the mobile system is Android or iOS 3.

Ask a question about MySQL configuration issues

I installed the mysql4.1.14 version, phpMyAdmin version is 4.0.5 then install login phpMyAdmin always prompt this error Ask what might be the reason Reply to discussion (solution) I checked the information on the Internet, and it was imported,

Problems with PDO Fetch

PDO data The younger brother encapsulates a function, there are three graphs, I want to take fetch () to the data to do While loop, but there is a dead loop, $roomName is a value Solving Reply to discussion (solution) Your getlistroom called

How is local multiport multi-site pseudo-static configured?

Not 80 port how to write? Reply to discussion (solution) placed separately. htaccess solved, today all day to understand pseudo-staticRewriterule ^p ([0-9]?) \.html$ list.php?parent_id=$1In fact, I want to write this, the results found

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