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  • The proximity principle of $this in php

    The proximity principle of $this in php

    The proximity principle of $this in PHP: 1. The proximity principle of $this applies not only to private attributes, but also to private member methods. 2. $this refers to the called object, but when dealing with private attributes and methods, the proxim
    2022-05-30
  • php $this what does it mean

    php $this what does it mean

    The meaning of php $this: 1. $this is a reference to the current object. There is a pointer in $this. Whoever calls it will point to it. It can only be used within the class. 2. $this cannot be used to access static properties, because static properties a
    2022-05-30
  • What is the php automatic loading mechanism?

    What is the php automatic loading mechanism?

    Introduction to the PHP automatic loading mechanism: 1. Automatic loading means that when instantiating, PHP automatically hands over the required files to require, and there is no need to manually require. 2. Laravel, thinkphp, yii2 and other frameworks
    2022-05-30
  • What is CLI mode in php

    What is CLI mode in php

    Introduction to CLI mode in php: 1. It is the interface for PHP to run on the command line, which is different from the PHP environment running on the web server. 2. Advantages: When using multiple processes, after the child process ends, the kernel is re
    2022-05-30
  • Use of __sleep method in php

    Use of __sleep method in php

    The use of __sleep method in php: 1. Automatically called when serialize() is called outside the class. 2. The __sleep() method is usually used to submit uncommitted data or similar cleaning operations. This feature is useful if you have some large object
    2022-05-30
  • Use of __isset method in php

    Use of __isset method in php

    The use of __isset method in php: 1. isset() is a function used to determine whether a variable is set. It passes in a variable as a parameter. If the passed in variable exists, true is returned, otherwise false is returned. 2. It will be automatically ca
    2022-05-27
  • Introduction to php magic method __invoke

    Introduction to php magic method __invoke

    Introduction to the PHP magic method __invoke: 1. Directly call the object name. When the method is used, the __invoke() method is called. 2. The object itself cannot be used directly as a function. If you remove the __invoke() method and still use the ob
    2022-05-27
  • How to get member attributes using __get in php

    How to get member attributes using __get in php

    __get obtains member attributes in PHP: 1. Private member attributes can be obtained outside the object. __get() not only obtains the private member variables of the current class, but can also perform other operations in this method. 2. If the member pro
    2022-05-27
  • The use of __callStatic method in php

    The use of __callStatic method in php

    The use of the __callStatic method in PHP: 1. It will be automatically called when the static method to be called does not exist or has insufficient permissions. 2. Same as the __call() method, accepting method name and array as parameters.
    2022-05-27
  • What is the __destruct method in php

    What is the __destruct method in php

    Introduction to the __destruct method in PHP: 1. It is automatically triggered when the class is destroyed. You can use the unset method to trigger this method. 2. An optional part of the class, usually used to complete some cleaning tasks before the obje
    2022-05-27
  • How to use __call method in php

    How to use __call method in php

    Usage of the __call method in PHP: 1. When the method to be called does not exist or has insufficient permissions, it will be called automatically. 2. First, rewrite the __call method. The __call method has two parameters, method and param, which correspo
    2022-05-25
  • The use of __clone in php

    The use of __clone in php

    The use of __clone in php: 1. Used for object copying. Object copying is accomplished through the clone keyword. 2. The __clone() method does not require any parameters. 3. While copying, if some attributes of the target object are different from those of
    2022-05-25
  • Two ways to generate user passwords in php

    Two ways to generate user passwords in php

    There are two ways to generate user passwords in PHP: 1. Hash passwords, which mainly use one-way dispersion algorithms to create password dispersion. 2. The md5 password is an asymmetric encryption. It's a good idea to add obfuscated strings when enc
    2022-05-25
  • Introduction to pipelines for PHP multi-process communication

    Introduction to pipelines for PHP multi-process communication

    Introduction to pipelines in PHP multi-process communication: 1. Pipes are a commonly used means of multi-process communication. Pipes are divided into unnamed pipes and named pipes. 2. Unnamed pipes can only be used for communication between processes th
    2022-05-25
  • What are php semaphores and shared memory?

    What are php semaphores and shared memory?

    Introduction to PHP semaphores and shared memory: 1. Semaphore: It is an atomic operation provided by the system. A number of signals can only be operated by one process at the same time. 2. Shared memory: It is a public memory area opened by the system i
    2022-05-25
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