Detailed introduction and usage of constant function

This article mainly introduces the usage of get_defined_constants function in PHP. The function, definition and usage skills of get_defined_constants function are analyzed with examples. Friends in need can refer to the following examples of this article to describe the usage of get_defined_constants function in PHP. Share it with everyone for your reference. The specific analysis is as follows: get_defined_constants (PHP 4 > = 4.1.0, PHP 5) get_defined_constants - Returns an associative array with the names of all constants and their value description array get_defined_constants ([boolean$collocation]) Returns the name and value of all currently defined constants. This includes extensions set up and define() functions created. The parameter classification causes this function to return the multidimensional array with the first item in the category dimension and the constants and their values ​​in the second dimension.

1. php get_defined_constants() function usage

Introduction: This article mainly introduces PHP The usage of get_defined_constants function, the example analyzes the function, definition and usage skills of get_defined_constants function. Friends in need can refer to

2. Usage of constant function in PHP

Introduction: # constant - Returns a constant value interface Test{ const BAR = 'foobar';} class Foo{ const BAR = 'foo_bar';} $test = 'BAR';echo constant('Test::' . $test);echo PHP_EOL;echo 'Foo::'

3 . Recommended articles about constant usage examples

##Introduction: githttps://github.com/ sea-boat/mysql-protocol overview server status flag. More details: https://dev.mysql.com/doc/internals/en/status-flags.htmlServerStatus class package com.seaboat.mysql.protocol. constant;/** *...

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10 recommended articles about the constant() function

## Introduction: githttps://github.com/sea-boat/mysql-protocol Overview server status identification. More details: https:// dev.mysql.com/doc/internals/en/status-flags.htmlServerStatus class package com.seaboat.mysql.protocol.constant;/** *...

5.

php Summary of usage of constant() function instances

##Introduction: See this The name has a very high-end feel to it, right? Yes, magic methods are indeed advanced. So, what is a magic method? In PHP, methods starting with two underscores are called "Magic methods". For example, __construct(), __destruct (), __clone(), and __call(),,__get(), __set(),__sleep(), __wakeup(), __toS...

6. 10 recommended content about the constant() function

Introduction: githttps://github.com/sea-boat/mysql-protocol overview server status identification. More details: https://dev.mysql.com/doc/internals/en/status-flags.htmlServerStatus class package com.seaboat.mysql.protocol.constant;/** *...

7. How to use COnSTANT? Summary of COnSTANT instance usage

Introduction: githttps://github.com/sea-boat/mysql-protocol overview server status identification. More details: https://dev.mysql.com/doc/internals/en/status-flags.htmlServerStatus class package com.seaboat.mysql.protocol.constant;/** *...

8. Note 018 The constant() function in PHP

Introduction: Note 018 The constant() function in PHP

9. CI framework source code reading, configuration of system constant file constants.php

##Introduction: CI framework source code reading, configuration of system constant file constants.php

10. The perfect solution to PHP error Notice: Use of undefined constant

Introduction:: This article mainly introduces the PHP error Notice: Use of The perfect solution to undefined constant, students who are interested in PHP tutorials can refer to it.

11. mac1011 php error Use of undefined constant MCRYPT_RIJNDAEL_128

Introduction:: This article mainly introduces mac1011 php error Use of undefined constant MCRYPT_RIJNDAEL_128. Students who are interested in PHP tutorials can refer to it.

12. Notice: Use of undefined constant appears when running PHP. Perfect solution

Introduction:: This article mainly introduces the perfect solution for Notice: Use of undefined constant when running PHP. Students who are interested in PHP tutorials can refer to it.

13. undefined What does it mean when PHP runs Notice: Use of undefined constant? Share the perfect solution

Introduction : What does undefined mean: What does undefined mean? The perfect solution for Notice : Use of undefined constant appears when PHP is running. Share: Notice: Use of undefined constant ALL_PS - assumed 'ALL_PS' in E:Servervhostswww.lvtao.netglobal.php on line 50 Notice: Undefined index: EaseTemplateVer in E:Servervhosts

14. Constants Basic PHP Basic Learning Use of Variables

Introduction ：Constants basics: Constants basic php basic learning, the use of variables: Copy the code The code is as follows:";//Output "one" echo $$$three ."
";//Output "" //There are 8 types in php //4 kinds of scalars: int integer // bool boolean // float,double,real // string / /2 composite types: array //

15. Solution to Notice: Use of undefined constant when PHP is running

Introduction: Solution to Notice: Use of undefined constant when PHP is running

16. Solution to Notice: Use of undefined constant when PHP is running

Introduction: Solution to Notice: Use of undefined constant in php

17. Configuration of CI framework system constant file constants.php Interpretation

Introduction: Configuration interpretation of CI framework system constant file constants.php

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18. Notice appears when running PHP: Use of undefined constant The perfect solution sharing_PHP tutorial

Introduction: Notice appears when running PHP: Share the perfect solution for Use of undefined constant. Notice: Use of undefined constant ALL_PS - assumed 'ALL_PS' in E:Servervhostswww.lvtao.netglobal.php on line 50 Notice: Undefined index: EaseTemplateVer in E:Servervhostswww.

19. CI framework source code reading, system constant file constants.php configuration_PHP tutorial

Introduction: CI framework source code reading, system constant file constants.php configuration. Configuring system constants 1. Check and configure these preferences when the file system is running. These default values ​​will appropriately increase the security of the system when the file system is running, but in PHP or

20. CI framework source code reading---------system constant file constants.php_PHP tutorial

Introduction: CI framework source code reading--- ------System constant file constants.php. Configuring system constants 1. Check and configure these preferences when the file system is running. These default values ​​will appropriately increase the security of the system when the file system is running, but in PHP or

21. Solution to Notice: Use of undefined constant when PHP is running_PHP Tutorial

Introduction: Solution to Notice: Use of undefined constant when PHP is running . Notice: Use of undefined constant ALL_PS - assumed ALL_PS in E:Servervhostswww.lvtao.netglobal.php on line 50 Notice: Undefined index: EaseTemplateVer in E:Servervhostswww.lvtao.ne

22 . php prompt Notice: Use of undefined constant name - assumed_PHP tutorial

Introduction: php prompt Notice: Use of undefined constant name - assumed. We know that PHP has two ways to write variables in arrays. When we get this prompt, you write [name], so there will be a Notice: Use of undefined constant name - assumed name

23. php Notice: Use of undefined constant solution_PHP tutorial

Introduction: php Notice: Use of undefined constant solution. When I was doing PHP, I suddenly got the error php Notice: Use of undefined constant. One of them is that the variable is not defined. Let’s take a look at the solution. Error message php No

24. PHP uses dynamic Constant and Define values_PHP tutorial

Introduction: PHP usage Dynamic Constant and Define values. In PHP, Constant and Define are constants, so I will introduce a method to dynamically use the Constant and Define value methods. I hope it will be helpful to all students. PHP To show or use

25. Fatal error: Undefined class constant 'MYSQL_ATTR_USE_BUFFERED_QUERY' in D:inetpubvhostszenpty.comhttpdocsincludesdatabase,bufferedreader_PHP tutorial

Introduction: Fatal error: Undefined class constant 'MYSQL_ATTR_USE_BUFFERED_QUERY' in D:inetpubvhostszenpty.comhttpdocsincludesdatabase, bufferedreader. Fatal error: Undefined class constant MYSQL_ATTR_USE_BUFFERED_QUERY in D:inetpubvhostszenpty.com

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