How predis implements the pconnect method of phpredis
This article mainly introduces how predis implements the pconnect method of phpredis. It has a certain reference value. Now I share it with you. Friends in need can refer to it
predis and phpredis are both PHP clients of redis. You can read the difference here and will not go into details here.
phpredis is a PHP extension, written in C language. It was born earlier and many PHPers are familiar with it.
Predis is written in PHP language. Due to the popularity of composer in recent years and the support of composer by many frameworks, predis stored in the composer library has also been widely used.
pconnect() is a method in phpredis. It is different from connect(). For detailed information, you can read this article. To summarize, the connection after the pconnect method is established is not closed with the end of the request, but depends on php-fpm process, php-fpm process does not die, redis connect will always exist until the idle timeout automatically disconnects. That is, a persistent connection is established, which is suitable for PHP requesting Redis under high concurrency.
But predis does not have a pconnect() method, how to implement similar functions?
The project uses the Laravel framework, but the relevant configuration parameters are not found in the document. So I could only read the plug-in source code, and finally found a method to connect to redis in the class /src/Connection/StreamConnection.php:
/**
* Initializes a TCP stream resource.
*
* @param ParametersInterface $parameters Initialization parameters for the connection.
*
* @return resource
*/
protected function tcpStreamInitializer(ParametersInterface $parameters)
{
if (!filter_var($parameters->host, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
$address = "tcp://$parameters->host:$parameters->port";
} else {
$address = "tcp://[$parameters->host]:$parameters->port";
}
$flags = STREAM_CLIENT_CONNECT;
if (isset($parameters->async_connect) && $parameters->async_connect) {
$flags |= STREAM_CLIENT_ASYNC_CONNECT;
}
if (isset($parameters->persistent)) {
if (false !== $persistent = filter_var($parameters->persistent, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE))
{
$flags |= STREAM_CLIENT_PERSISTENT;
if ($persistent === null) {
$address = "{$address}/{$parameters->persistent}";
}
}
} $resource = $this->createStreamSocket($parameters, $address, $flags);
return $resource;
} on line 19 $parameters->persistentWe can see an unfamiliar parameterpersistent, translated as 'persistent'. So as long as when using predis to connect to redis, add the parameter persistent and assign it to a true or 1, you can implement pconnect() of phpredis, which is simple and convenient.
The following is email evidence, indicating that there is no misunderstanding of the source code:
Can the predis support the function pconnect() which in php-redis? Yes, just add in the connection parameters persistent=1 (when using URI strings) or persistent => true (when using a named array).
How did you step into this pit? Or because of the framework documentation, many PHP frameworks currently support composer, such as Laravel, Yii, CI, etc., but there is no guarantee that the documentation will be updated in time, especially the Chinese documentation, so you still need the ability to read the source code.
In fact, you can see a lot from the code above:
predis uses tcp to connect to redis, and the main function used is
stream_socket_client(Predis also has an http way to connect to redis, mainly using curl, which is not in this class).predis does not depend on phpredis. Many project environments install phpredis and predis in the framework, thinking that the latter depends on the former, which is wrong.
In line 16 of the above code, you can also see another parameter async_connect, which is used for asynchronous connection. It is also very important, but it is not introduced in many documents.
Source:https://blog.csdn.net/u013474436/article/details/53131662
Related recommendations:
php-redis extension installation (phpredis)
The above is the detailed content of How predis implements the pconnect method of phpredis. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1664
14
1423
52
1317
25
1268
29
1244
24
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1?
Apr 17, 2025 am 12:06 AM
In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
How does PHP handle file uploads securely?
Apr 10, 2025 am 09:37 AM
PHP handles file uploads through the $\_FILES variable. The methods to ensure security include: 1. Check upload errors, 2. Verify file type and size, 3. Prevent file overwriting, 4. Move files to a permanent storage location.
How does PHP type hinting work, including scalar types, return types, union types, and nullable types?
Apr 17, 2025 am 12:25 AM
PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.
The Enduring Relevance of PHP: Is It Still Alive?
Apr 14, 2025 am 12:12 AM
PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.
PHP vs. Python: Understanding the Differences
Apr 11, 2025 am 12:15 AM
PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.
