eAccelerator is really a good thing (its predecessor is truck-mmcache). It is a caching system that works with PHP (supports PHP5) and exchanges data through shared memory or disk files. It is widely used to "encode" PHP source code (less appropriately called "encryption") and cache the intermediate code of PHP execution to speed up. There are many and detailed articles about the installation and use of eA. What I would like to recommend this time is to use it to assist in program design and caching. It provides a set of APIs as follows: It is a very convenient and stable native cache implementation. At present, this part of the design seems to only support shared memory, so it can only be used in Unix-Like OS. Windows is not so lucky. 1. eaccelerator_put($key, $value, $ttl=0) Store $value into the cache with $key as the key name (object type is supported under php4, but it seems that it is not supported in zend2 from the source code). $ttl is the life cycle of this cache, in seconds. Omit this parameter or specify it as 0 Indicates no time limit until the server is restarted and cleared. 2. eaccelerator_get($key) Return the data stored in the corresponding eaccelerator_put() from the cache according to $key. If the cache has expired or does not exist, the return value is NULL. 3. eaccelerator_rm($key) Remove cache based on $key 4. eaccelerator_gc() Remove and clear all expired keys 5. eaccelerator_lock($key) Add a lock operation to $key to ensure data synchronization during multi-process and multi-thread operations. You need to call eaccelerator_unlock($key) to release this lock or wait for the program request to automatically release this lock. For example: ? & Lt;? Php Eaccelerator_lock ("Count"); Eaccelerator_put ("Count", Eaccelerator_get ("Count")); 8. eaccelerator_cache_result($key, $ eval_code, $ttl=0)
Cache the execution result of the $eval_code code for $ttl seconds, (the $ttl parameter is the same as eacclerator_put), similar to cache_output
For Example:
? .eaccelerator_unlock($key)
Release lock based on $key
7. eaccelerator_cache_output($key, $eval_code, $ttl=0)
Cache the output of the $eval_code code for $ttl seconds (the $ttl parameter is the same as eacclerator_put)
For Example:
Copy code
n"; } echo ', the world!'; } function now($t) {
echo date('Y-m-d H:i:s', $t);
|

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

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.


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