This article mainly introduces the detailed introduction to the implementation of ternary operator in PHP. It has certain reference value. Now I share it with you. Friends in need can refer to
Ternary operator in PHP. It is also called the ternary operator. In fact, I often call it the question mark operator. In fact, it can be done like this. The ternary operator can implement simple conditional judgment functions. Now let me introduce to you some ternary operators. Example
The function of the ternary operator is consistent with the "if...else" process statement. It is written in one line, with concise code and high execution efficiency. Proper use of the ternary operator in PHP programs can make scripts more concise and efficient. The syntax of the code is as follows:
(expr1)?(expr2):(expr3); //表达式1?表达式2:表达式3
Explanation: If the condition "expr1" is true, execute the statement "expr2", otherwise execute "expr3".
<?PHP $a=10; $b=20; $c=$a>$b?($a-$b):($a+$b); //说明:如果变量a大于变量b则执行问号后面的,否则就执行:冒号后面的 echo $c; ?>
Expressions can be functions, arrays, etc.
In fact, the ternary operator can be extended and used. When the set condition is true or not, the execution statement can be more than one sentence. Try the following format:
(expr1) ? (expr2).(expr3) : (expr4).(expr5);
We can clearly see that multiple execution statements can be connected using string operators ("."), and each execution statement is surrounded by small angle brackets to indicate that it is an independent and complete execution statement. . After this expansion, its function is closer to the "if...else" process statement.
At the same time, the ternary operator can also be used nested. For example, when a is greater than b: if a is less than c, then x=c-a otherwise x=a-c; otherwise when a is less than b: if b is less than c, then x=c-b otherwise x=b-c:
$a>$b ? $x=($a<$c ? $c-$a : $a-$c) : $x=($b<$c ? $c-$b : $b-$c);
The readability of the nested ternary operator is not very good, and there may be problems with maintaining the code in the future, so in this case we still use if else if directly. Make it happen.
Related recommendations:
Detailed explanation of php ternary operator and if
Knowledge points about php ternary operator Summary
The above is the detailed content of Detailed introduction to php ternary operator examples. For more information, please follow other related articles on the PHP Chinese website!

Load balancing affects session management, but can be resolved with session replication, session stickiness, and centralized session storage. 1. Session Replication Copy session data between servers. 2. Session stickiness directs user requests to the same server. 3. Centralized session storage uses independent servers such as Redis to store session data to ensure data sharing.

Sessionlockingisatechniqueusedtoensureauser'ssessionremainsexclusivetooneuseratatime.Itiscrucialforpreventingdatacorruptionandsecuritybreachesinmulti-userapplications.Sessionlockingisimplementedusingserver-sidelockingmechanisms,suchasReentrantLockinJ

Alternatives to PHP sessions include Cookies, Token-based Authentication, Database-based Sessions, and Redis/Memcached. 1.Cookies manage sessions by storing data on the client, which is simple but low in security. 2.Token-based Authentication uses tokens to verify users, which is highly secure but requires additional logic. 3.Database-basedSessions stores data in the database, which has good scalability but may affect performance. 4. Redis/Memcached uses distributed cache to improve performance and scalability, but requires additional matching

Sessionhijacking refers to an attacker impersonating a user by obtaining the user's sessionID. Prevention methods include: 1) encrypting communication using HTTPS; 2) verifying the source of the sessionID; 3) using a secure sessionID generation algorithm; 4) regularly updating the sessionID.

The article discusses PHP, detailing its full form, main uses in web development, comparison with Python and Java, and its ease of learning for beginners.

PHP handles form data using $\_POST and $\_GET superglobals, with security ensured through validation, sanitization, and secure database interactions.

The article compares PHP and ASP.NET, focusing on their suitability for large-scale web applications, performance differences, and security features. Both are viable for large projects, but PHP is open-source and platform-independent, while ASP.NET,

PHP's case sensitivity varies: functions are insensitive, while variables and classes are sensitive. Best practices include consistent naming and using case-insensitive functions for comparisons.


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

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Zend Studio 13.0.1
Powerful PHP integrated development environment

WebStorm Mac version
Useful JavaScript development tools

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
