百度 反之，如果一群人在公共场合如KTV、夜店或酒店等地方吸毒被抓，最高只会判15天行政拘留。
PHP7 is a brand new version of the PHP programming language, which has been greatly improved mainly in terms of performance. Official documents show that PHP7 can achieve twice the performance of PHP5.x version. At the same time, the syntax of PHP is sorted out, and many popular syntax formats in other languages ??are provided. The commendable thing is that after making such a big change, the compatibility of PHP7 is still very good. For the vast majority of applications, you can migrate to the PHP7 version without making any modifications.
PHP7 is a major version of the PHP programming language and is billed as a revolution in developing web applications that can develop and deliver mobile enterprise and cloud applications. This version is considered the most important change in PHP since PHP5 was released in 2004.
The PHP 7 version has greatly improved performance. In some WordPress benchmark tests, the performance can reach 3 times that of PHP 5.6.
Tips: Before starting this tutorial, you need to understand the old version of PHP, and then start learning the new features of PHP 7.
PHP7 is the most anticipated and the main function of the PHP programming language. Let us run the first PHP7 example!
First PHP7 example
Instance
<html> <head> <title>Online PHP-7 Script Execution</title> </head> <body> <?php echo "<h1>Hello, PHP-7!</h1>"; ?> </body> </html>
Running example?
Click the "Run Instance" button to view the online instance
Tips: Our PHP7 tutorial will teach you how to use the new features of PHP7 in a simple and intuitive way. If you are a beginner, start from the basics and gradually move forward by learning a little bit every day. If you have any questions, please go to the PHP Chinese website PHP7 Community to ask your questions, and there will be enthusiastic netizens Answer for you.
Overview of new features of PHP7
Dozens of features have been added to PHP 7, among which you can refer to the following for the most important features:
-
Improved performance - PHPNG code is merged in PHP7, which is twice as fast as PHP 5.
Lower memory consumption - PHP 7 has been optimized to utilize fewer resources.
Scalar type declarations - PHP 7 can now enforce parameter and return types.
Consistent 64-bit support - Consistent support for machines with 64-bit architecture.
Improved exception hierarchy - Improved exception hierarchy.
Many fatal errors converted to exceptions - Exception scope increased to cover many fatal errors converted to exceptions.
Secure Random Number Generator - Added new secure random number generator API.
Removed Deprecated SAPIs and Extensions - Various old and unsupported SAPIs and extensions have been removed from the latest version.
Null (null) coalescing operator (??) - A new null coalescing operator has been added.
Return and scalar type declaration - Support return type and parameter type addition.
Anonymous class - supports anonymous addition.
Zero-Cost Assertions - Supports zero-cost insertion assertions.
PHP 7 uses the new Zend Engine 3.0 to improve application performance by almost twice as much, it improves memory consumption by 50% better than PHP 5.6. It allows serving more concurrent users without requiring any additional hardware. PHP 7 was designed and refactored with today's workloads in mind.
Content covered by this PHP7 tutorial manual
This tutorial covers the introduction of all new features of PHP7, including new features, deprecated features, and new classes of PHP7 and introduction to interfaces, modifications to various extensions, etc.
Tips: Each chapter of this tutorial contains many real examples that you can try using the online editor for testing. These examples will help you better understand and use the new features of PHP7.
Other PHP7 related learning reference resources
In addition to the knowledge expansion on the right side of this page, the following resources are also selected for everyone
Latest chapter
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