When a user submits a form, the same record may be repeatedly inserted into the database due to the speed of the network or the malicious refreshing of the webpage. this is a tricky problem. We can start with the client and the server to avoid
1. the MVC introduction mode runs the core business logic of the system internally; the view processing system's formatted output; the controller processes the input and communicates with the controller. 2. the common template system is Smarty \
I recently read erlang systematically. now I use erlangprogramming as the learning material. after reading the first seven or eight chapters, I tried to write something and found that I was helpless, there are very few materials and documents that
1. js method to call the php file and obtain the values in php. for example, in the.html page, use the following call: & lt; scripttype = & quot; text/javascript & quot; src = & quot; B. php? Action = test & quot; & gt; & lt;/script & gt; & lt;
Some problems have been encountered after the website is migrated to the server. here we summarize: 1. no response, no prompt, and blank page 2 is returned. there is content, but it is disordered and many are lost, there is no CSS style 1, and the
Recently, the project needs to have such a requirement on the array. the content of the array may change constantly. if you know a key name of the array, how can you get the next key name? At the beginning, I thought it would not be easy to write. I
Well, it sounds very easy, but it is not easy to operate. A few days ago, I talked to the technical director of a company about the application of PHP object-oriented in the company. The reason is very simple. there is no mandatory reason to make
First of all, give a php sample code. if you fully understand why the following results appear, you do not need to waste time on this blog, here, let php beginners pay attention to the possible mistakes [php] & lt ;? Phpvar_dump (& quot; abcdefg &
Associated query. Yii also supports the so-called statistical query (or aggregate query ). It refers to retrieving the aggregated information of associated objects, such as the number of comments for each post and the average grade of each product.
Concerning the change of listorder setting in the option sorting of the phpcmsv9 voting module, the younger brother mainly modified three files in three places. I think this method is enough. You are welcome to make a brick. Modify three files: 1.
Naming range Note: Supports the naming range from version 1.0.5. The original idea of naming scope came from RubyonRails. namedscope indicates a named (named) query rule. it can be used together with other naming ranges and applied to Act... "/>
Due to version updates, these files have a new name: I use php 5.4. ini-production corresponds to php. ini-recommendedphp.ini-development corresponds to php. the other steps of ini-dist are the same, and the configuration file needs to be modified,
When building the LAMP environment, apache and php are both manually installed, and only the default extension library of php is installed. When curl is used, the curl extension library is not loaded. You have to install it manually. 1. switch to
There is a problem: how to replace a specific string in a string. For example, replace abc in the string: abcfdabertDefdaAbcfdd, where abc is case-insensitive. after the replacement, the string is: fdabertDefdafdd, which immediately comes up with
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