


Introduction to php commonly used Stream function set_PHP tutorial
stream_bucket_append function: add data to the queue
stream_bucket_make_writeable function: return a data object from the operation queue
stream_bucket_new function: create a new data for the current queue
stream_bucket_prepend function: prepare data to the queue
stream_context_create function: create a data stream context
stream_context_get_default function: get the default data flow context
stream_context_get_options function: get the settings of the data stream
stream_context_set_option function: set the data stream, data packet or context
stream_context_set_params function: Set parameters for data streams, data packets or contexts
stream_copy_to_stream function: Copy operations between data streams
Stream_filter_append function: Add filters to data streams
Stream_filter_prepend function: Prepare for data streams Add a filter
stream_filter_register function: register a filter for a data stream and execute it as a PHP class
stream_filter_remove function: remove the filter from a data stream
stream_get_contents function: read the remaining data in the data stream to string
stream_get_filters function: Returns the list of registered data stream filters
stream_get_line function: Gets the line from the data stream resource according to the given delimiter
stream_get_meta_data function: From the encapsulated protocol file pointer Get headers/metadata
stream_get_transports function: return the registered Socket transport list
stream_get_wrappers function: return the registered data stream list
stream_register_wrapper function: register a URL wrapping protocol implemented with PHP class
stream_select function : Receive data stream arrays and wait for their status to change
stream_set_blocking function: Set a data stream to a blocked or non-blocking state
stream_set_timeout function: Set the timeout for the data stream
Stream_set_write_buffer function: Set the data stream Buffer
stream_socket_accept function: accept the Socket connection created by the function stream_socket_server()
stream_socket_client function: open the Socket connection of the network or UNIX host
stream_socket_enable_crypto function: turn on or off data encryption for a connected Socket
stream_socket_get_name function: Get the name of the local or network Socket
stream_socket_pair function: Create two indistinguishable Socket data stream connections
stream_socket_recvfrom function: Get data from the Socket, regardless of whether it is connected or not
stream_socket_sendto function : Send data to the Socket, regardless of whether it is connected or not
stream_socket_server function: Create a network or UNIX Socket server
stream_wrapper_restore function: Restore a previously unregistered data packet
stream_wrapper_unregister function: Unregister a URL address packet

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.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.

Key players in HTTP cache headers include Cache-Control, ETag, and Last-Modified. 1.Cache-Control is used to control caching policies. Example: Cache-Control:max-age=3600,public. 2. ETag verifies resource changes through unique identifiers, example: ETag: "686897696a7c876b7e". 3.Last-Modified indicates the resource's last modification time, example: Last-Modified:Wed,21Oct201507:28:00GMT.

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 is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.


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