GOOCODE - Find your code/scripts

0 Encoding specifications and standards are extremely important when working with groups to develop PHP projects. Next, let's revisit the PHP code related specifications developed by the FIG organization. The current general specifications are: PSR-1 basic code specification, PSR-2 code style specification, PSR-3 log interface specification, PSR-4 Autoloader automatic loading specification.

The PSR-1 Basic Code Specification establishes standards for the basic elements of the code to ensure a high degree of interoperability between shared PHP code.

0 Monolog is a full and easy to expand log log library under php. There are many well-known php frameworks including Symfony, Laravel, CakePHP and so on that have Monolog built in. Monolog can send your logs to files, sockets, inboxes, databases and various web services.

Monolog follows the PSR3 interface specification and can be easily replaced with other log classes that follow the same specification. Monolog has good extensibility. Through the interfaces Handler, Formatter and Processor, you can expand and customize the Monolog library.

0 Recently, due to project requirements, the server was upgraded from CentOS6 to CentOS7, and the corresponding PHP version was also upgraded to PHP5.6. We are familiar with a one-click installation package for LEMP environment, but in this article we will install each component module separately and build a complete PHP operating platform.

The LNMP environment we often refer to is the Linux/nginx/MySQL/PHP combination. What is LEMP? Actually, Nginx is pronounced Engine-X = E. The LEMP package is made up of Linux, nginx, MariaDB/MySQL, and PHP. It seems that LEMP and LNMP are the same. Now, it is customary to call LEMP in the industry. MariaDB is a branch of the community-driven MySQL database. It has more features and better performance, so we installed MariaDB under CentOS7. I already installed CentOS7. Now I just need to install Nginx, MariaDB and PHP.

1 File upload WEB development in a wide range of applications, we often send microblogging, send micro-channel circle of friends have used the picture upload function. File upload refers to the process of uploading local images, videos, audio files to the server for other users to browse or download. Today, I talk to you about the common file (picture) upload methods and points to deal with.

1 Sometimes we need to record the operation of an operation event of the user or back-end, you can use the back-end language such as PHP to log the operation results to the log file, easy to test and find the problem. In particular, these are running in the back-end and the front can not directly see the results of the operation, then you can use the log file to record, if you often interface with some interfaces such as paypal interface, amazon card interface, log records will be not enough.

We talk about PHP log records, log information is written to a log file, different from the memory log. The process of writing to the log is to open the log file (newly created if it does not exist), then append the log content to the back of the log file, and finally close the log file.

In this article, we save the contents of the log in json format for easy reading directly when needed.

0 In the development, we often encounter the conversion between the array and XML, especially when dealing with interface development often used, such as the other side of the client POST a XML format data to the server, the server program is responsible for receiving Analysis, there is a need to data table data in XML format to provide third-party applications.

0 The normal site to bring the kind of parameters may be very long, especially in the printing of paper products such as corporate brochures to be printed on a long url, then very ugly, and few people will go to remember this site, Although it is now possible to use a two-dimensional code to open a long URL. But people can use short URLs to achieve beautiful links, especially those with limited number of applications such as microblogging.

Short URL implementation principle is that there is a data table configuration file will be short URL and the actual URL corresponding, when a short URL request, the program jump to the corresponding actual URL up, in order to achieve the URL of the visit.

8 When the article content expertise, in order to facilitate reading and page display content we usually paged to display. The general page processing is published in the background when the article will be submitted to generate multiple pages after the static file. In this paper, we will use examples to explain the dynamic use of PHP long page content paging.

Manual paging: the general content in the edit when adding special paging tags, such as {pages}, submitted, the PHP program will process page breaks according to the page break, generate a different static pages. This sort of paging method is accurate, but need to manually add page breaks, a heavy workload.
Automatic paging: PHP program will be set according to the page break the content of the page, and then generate a different static pages. The method is efficient and requires a high tag for handling different html tags.

5 We submit the form, a limit can not be ignored is to prevent users who repeatedly submit the form, because there may be a user continuously hits the submit button or a malicious attacker to submit the data, then we submit the data after processing, such as modifying or adding data to the database when they will get into trouble.

So how do you avoid duplicate submission form this phenomenon happen? We can see from many aspects, first from the front end to make restrictions. In the front-end javascript is disabled after a button is clicked, the disabled, this simple method of preventing multiple clicks the submit button, but the disadvantage is that if the user has disabled javascript script is invalid. Second, we can do after submitting the redirect page redirection, that is submitted after the jump to a new page, the main F5 avoid duplicate submissions, but there are drawbacks. Thirdly, it is made unique database index constraint. Fourth, it is to do the session token authentication.

6 PHP's serialize a sequence of the variable, the variable type and returns a string expression with a structure, but JSON is a lighter, more user-friendly format for interfaces (AJAX, REST, etc.) for data exchange. In fact, both are in a string manner to reflect a data structure. So what difference does it have between them?

We may see the contents of a database or stored in a text file with a long list of seemingly has a special meaning in the text string some old WEB system. We look carefully will find that it has a data type and structure information, but it is not easy to read manual, it is only suitable PHP program reads. PHP's serialize the array is serialized and stored. We assume that there is such an array: