How to design high-performance interface in PHP

How to design a high-performance interface for php

##php interface design must consider performance, so that it can effectively face high concurrency In this case, let’s talk about several tips for optimizing PHP interfaces to improve performance.

The improvement in configuration is quite obvious for the overall execution efficiency of the system. There is nothing to question about this. As long as there is strength, Naturally, we can make more improvements in this aspect.

The optimization of this query involves sql optimization or database optimization. There are several simple optimization plans below.

1. To optimize sql, use linked list query appropriately and use connection (JOIN) instead of subquery. Generally, avoid using JOIN in the case of large tables and multiple tables. In this case, using JOIN will not achieve simplification. query effect.

2. SQL optimization, when querying table data, use accurate field names to avoid unnecessary field queries.

3. SQL optimization, proper use of primary foreign keys and indexes, the query efficiency of index fields is quite detailed compared to the efficiency of large table queries. But for the use of indexes, a few remarks. Indexes will fail in many cases. For example, if the overall field content of the index column accounts for too large, then the index will have no effect; it will also be invalid if it is not in or not exist; it is necessary to perform operations on the index column. Establish function indexes, etc.

4. For sql optimization, use in query appropriately and as little as possible. It is best to use union instead, which will be significantly more efficient. When using in, try to use index fields. SQL optimization, appropriate use of fuzzy queries. It is best not to use it and replace it with congruent, because indexes cannot be used in fuzzy conditions.

5. For database optimization, use reasonable field types for fields. Another way to improve efficiency is to try to separate fields when possible. Set to NOTNULL to avoid wasting space.

6. Database optimization and reasonable design of table structure. For example, sometimes it is better to have more necessary redundant fields than join table queries.

7. Database optimization and reasonable design of indexes. In joint table queries or conditional filtering, the query efficiency will be much faster after adding indexes to the data table.

Code optimization also varies from person to person. Everyone may have different coding habits and styles, and have their own opinions on improving code performance. , the following are some of my views.

1. Use foreach reasonably and try to use loops in loops as little as possible. If there are too many loops, it will be very performance-intensive.

2. During loops, try to avoid data operations, especially query operations. When there are too many loops, the efficiency of multiple calls is very low. Data can be obtained once and then spliced.

3. In the same way, in the loop, avoid multiple acquisitions of the configuration and calls to the time() function method. This one-time declaration can be used repeatedly.

4. In PHP, there is a difference between single quotes and double quotes. As a habit, I use single quotes for all strings because it does not require compilation. For efficiency, the difference may not be significant. Just a little bit

5. Make reasonable use of the functions in php, such as array functions, which are very rich. Make full use of them. Generally, don’t do the functions and methods that it supports by yourself

6. You can use the concept of dictionary to store the array in the form of a new index. I often use it in data reorganization

7. Depending on the scenario, reasonable use of cache can reduce repeated data queries and improve efficiency

8. Reasonable splitting of functions, such as a list query with detailed view, can be split into two interfaces to obtain data when needed and reduce resource waste.

Programs unrelated to response (such as logging, etc.) take too much time, use the fastcgi_finish_request() function to flush all responses Send the data to the client and end the request. This allows tasks that require a lot of time to run to continue running after the client ends the connection without affecting the time to respond to the client.

echo '例子：';
file_put_contents('log.txt', date('Y-m-d H:i:s') . " 上传视频\n", FILE_APPEND);
fastcgi_finish_request();
sleep(1);
file_put_contents('log.txt', date('Y-m-d H:i:s') . " 转换格式\n", FILE_APPEND);
sleep(1);
file_put_contents('log.txt', date('Y-m-d H:i:s') . " 提取图片\n", FILE_APPEND);

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