Instructions for parsing PHP cache functions_PHP tutorial
flush(): refresh the output program cache
for($i = 0; $i
echo str_repeat("n", 5000);
echo $i;
sleep(1);
flush();
}
ob_start(callback function, Limited length, output cache = 'true' at any time): On, premise: output_buffer = on
ob_clear(): Refresh
ob_end_clear(): Close, and refresh
ob_flush(): Output
ob_end_flush (): Close and output
ob_get_contents: Return to cache
ob_get_clean(): Return to cache and refresh
ob_get_flush(): Return to cache and close
ob_get_length(): Return to cache Content length
ob_get_level(): Returns the cache nesting level
ob_get_status (returns all = false): Returns the buffer status
ob_gzhandler(): Compresses the output cache, used as callback function: ob_start ('ob_gzhandler')
ob_implicit_flush(output refresh=true): When the parameter is true, the cache will be automatically refreshed every time the output is cached
ob_list_handlers(): List all functions that are using the cache.
output_add_rewrite_var(variable, value): Add the value of the URL rewriter. This function adds a name/value pair to the URL rewriting mechanism. This name-value pair will be added to URLs (in the form of GET parameters) and forms (in the form of input hidden fields), and can also be added to the session when transparent URL
rewriting is enabled with session.use_trans_sid ID. Absolute URLs (http://example.com/) are not rewritten, and the function behavior is controlled by the url_rewriter.tags php.ini parameter
output_add_rewrite_var('var', 'value');
echo ' can be rewritten'; //After rewriting: link
echo 'link2';//Absolute addresses are not rewritten
echo '
output_reset_rewrite_vars(): Reset the value of the URL rewriter, returning true successfully
output_add_rewrite_var('var', 'value' ; ="file.php">Not to be rewritten';//Reset, the address will not be rewritten

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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