How to pass values to variables in PHP? How to deliver?
We have learned so much about PHP. What is the value transfer method of variables in PHP today? How to deliver? , I wonder if you have fully mastered it. If not, then follow this article to continue learning.
Related recommendations:What are the knowledge points that you must know in PHP? (Second bullet)
The value-passing method of variables:
1, the value-passing method of variables is Refers to the internal detailed form of "passing one variable to another variable" - one-to-one;
2, the value-passing method of variables, there are only 2: value passing, reference passing;
Value transfer:
Sv1= 1;
$v2=Sv1; 1/This is value transfer
Simple understanding: Sv1 Take out the value (note: the value in Sv1 is still there), and then use this value to assign a value to $v2.
Image understanding:
Visible , Value transfer means that the value of variable v1 is copied, and then assigned to another variable v2.
Note:
1The two variables are equal in value at this time1
2The two variables are independent of each other - do not affect each other;
That is, Sv1=10; then echo $v2, //Output 1
The code is as follows:
<?php $v1 =1; $v2 = $v1; //值传递: $v1=10; echo "<br />v2 = $v2";//1 ?>
The running results are as follows:
Pass by reference:
In PHP, there is only one syntax form that can realize the reference-value transfer of variables: the & symbol.
An example is as follows!
$ml=1; $m2 = &$ml; //引用传值方式
Simple understanding: Copy the "reference relationship" between variable $m1 and its data values, and then give it to transaction $m2, that is, at this time , the variable $m2 also has a "reference relationship" (pointing relationship) with the original data,
The result is:
1, at this time there are still 2 variables, but only one Data value (data space), both variables point to this data space.
2. The operation of any of the variables is actually manipulating the data value (space).
<?php $v1 = 1; $v2 = $v1; //值传递: $v1 = 10; echo "<br />v1 = $v1";//10 echo "<br />v2 = $v2";//1 echo "<hr />"; $m1 = 1; $m2 =& $m1;//引用传值方式 $m1 = 10; echo "<br />m1 =$m1";//10 echo "<br />m2 = $m2";//10 ?> </body> </html>
The code is as follows:
Recommended learning: php video tutorial
The above is the detailed content of How to pass values to variables in PHP? How to deliver?. 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
AI Hentai Generator
Generate AI Hentai for free.
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
1377
52
PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian
Dec 24, 2024 pm 04:42 PM
PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati
Discuss CakePHP
Sep 10, 2024 pm 05:28 PM
CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu
CakePHP File upload
Sep 10, 2024 pm 05:27 PM
To work on file upload we are going to use the form helper. Here, is an example for file upload.
How To Set Up Visual Studio Code (VS Code) for PHP Development
Dec 20, 2024 am 11:31 AM
Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c
How do you parse and process HTML/XML in PHP?
Feb 07, 2025 am 11:57 AM
This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an
CakePHP Quick Guide
Sep 10, 2024 pm 05:27 PM
CakePHP is an open source MVC framework. It makes developing, deploying and maintaining applications much easier. CakePHP has a number of libraries to reduce the overload of most common tasks.
PHP Program to Count Vowels in a String
Feb 07, 2025 pm 12:12 PM
A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
