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Error accessing class constant

Teacher, what is the reason for the error when using the object::class constant name method? Parse error: parse error, expecting `','' or `';'' in /Library/WebServer/Documents/lp/class_const.php on line twenty four

車*不息 2017-07-11 10:02:25 0  3  1870

Access class constants using a simple variable containing the constant name

I'm trying to access a class constant in one of my classes: constMY_CONST="value"; If I have a variable to hold the name of this constant like this: $myVar="MY_CONST"; I can somehow access it? ?What is the value of MY_CONST? self::$myVar This obviously doesn't work since it's for...

P粉691461301 2023-10-20 14:57:01 0  2  734

$aa[bar] will report an error, right? PHP will consider bar as a constant.

$aa[bar] will report an error, right? PHP will consider bar as a constant.

紅月 2020-07-20 14:31:18 0  2  1331

In php, the class name::class, what does it mean?

I would like to ask: In the following PHP code, what does the class name::class mean? {code...}

曾經(jīng)蠟筆沒有小新 2017-06-30 09:54:29 0  2  1013

linux - Help: php high CPU usage

Linux-deployed lnmp recently found that the server CPU usage is very high. I used strace -cp 30811 to find that one access has the most severe usage. Then I called strace -T -e access -p 30811. The result is as shown in the figure: But I can’t find it in the program. There is a place where I am look...

天蓬老師 2017-06-30 09:55:09 0  2  1080

php - Use of undefined constant 0 - assumed ' 0' when using substr

In PHP version 5.6, the substr function is used to intercept strings. The code is as follows {code...} Use of undefined constant 0 - assumed ' 0' appears. The online solution is to modify error_reporting in php.ini to turn off the notice. But what is this essential question? ? like...

迷茫 2017-06-10 09:47:52 0  2  1352

Will calling a static method directly using the class name in PHP trigger the constructor of the class or parent class?

As the title says, PHP calls static methods directly using the class name. Two questions: 1. Will the constructor of the current class be called? 2 Will the constructor of the parent class of the current class be called?

淡淡煙草味 2017-07-07 10:34:10 0  3  1578

Does anyone know where Jingshui Brother Shui has a PHP class?

Who knows where Brother Shui in Jingshui has a PHP class? Who knows where Brother Shui in Jingshui has a PHP class?

A0五花牛 2020-10-10 00:54:44 0  1  1223

PHP class attribute declaration?

<?php class Image{     private $path;     public function __construct($path = './'){      &nb

A _ Ｑ _ｉ_ 2021-10-17 22:05:54 0  7  1052

Reworded title: Why doesn't PHP handle "class not found" errors?

In the example below, I want to catch the error and create a Null class if the class does not exist. But despite my try/catch statements, PHP just tells me that the 'SmartFormasdfasdf' class is not found. How to get PHP to catch "class not found" errors? <?phpclassSmartFormLoginextendsS...

P粉475126941 2024-01-03 19:53:41 0  2  646

When inserting data encapsulated by the PHP class, the insertion is always unsuccessful and false is returned;

<?php //Database operation class class Model{ Private $host; //Database address Private $user; //Database username Private $pwd; /

A _ Ｑ _ｉ_ 2021-10-13 10:21:27 0  6  1141

class - How does PHP implement that all subclass attributes have toArray() method?

How to implement in PHP that all properties of subclasses have toArray() method? After the call, it becomes an array. How to design the parent class? ?

阿神 2017-05-16 12:59:22 0  3  676

What is the difference between PHP class declaration and instantiation?

I am a newbie. I found that many tool classes can be used by directly declaring them. For example, {code...} in laravel makes me confused. Does declaring a class variable instantiate the code? After searching on Baidu, no one asked about this issue in PHP language, only Java, and Java is like this.....

習慣沉默 2017-05-16 13:10:23 0  2  573

Fatal error occurs in the test database: Class 'think\Controller' not found in C:\php\WWW\t\application\admins\controller\Test.php on line 8

Fatal error: Class 'think\Controller' not found in C:\php\WWW\t\application\admins\controller\Test.php on line 8 There is no foundation at all... the PHP integrated environment used

有宏陸 2019-06-17 17:24:09 0  2  2016

How to handle Uncaught Error: PHP/Composer class not found?

I'm starting a project with oop as a beginner and I'm trying to use some classes that I think will be recognized by vscode and composer because when I click on their namespace it directs me to the correct class, but when When I run the code in the browser I get a fatal error telling me that my class...

P粉304704653 2023-09-04 13:46:14 0  1  646

Preview of the teaching course on September 10, 2018: How to implement paging query data table and classification query for class encapsulation in PHP

Preview of the teaching content of the third online class of PHP Chinese website on September 10, 2018: 1. Teaching topic: How to use PHP to implement paging query data tables? Encapsulate classification queries into classes to achieve code reuse. For more detailed knowledge points, please pay atten...

藏色散人 2018-09-10 10:02:37 0  0  1392

PHP Chinese website public welfare live class: "Revealing the whole process of Web projects from analysis to online", starting tonight!

A new large-scale free public welfare live class on the PHP Chinese website has started! For three consecutive nights, all P friends, please move your benches and get ready! Training objectives: reveal the complete process of a Web project from analysis and planning, environment construction, use of...

PHPz 2018-08-07 10:59:05 0  1  3161

Java's [EncryptUtill.java encryption class, what does it correspond to PHP? I found a few on the Internet, but after encryption, they can't match those of Java.

Java's [EncryptUtill.java encryption class, what does it correspond to PHP? I found a few on the Internet, but after encryption, they can’t match those of Java.

巴扎黑 2017-06-20 10:07:34 0  2  943

For the third access method, I get an error locally.

echo '3.Object::Class constant name:'.(new demo)::siteName.'<br>';Prompt error: Parse error: syntax error, unexpected '::' (T_PAAMAYIM_NEKUDOTAYIM), expecting ',' or ';' in E:\w

哥特 2018-05-02 22:11:09 0  1  1367

I know how to cut pictures on the front end and want to learn PHP website development. I would like to ask for a complete class video of the physical class of a first-line PHP institution in Beijing.

I know how to cut pictures on the front end and want to learn PHP website development. I would like to ask for a complete class video of the physical class of a first-line PHP institution in Beijing. I learned front-end cutting at an institution before, and then became a cutter, but I didn’t have mu...

. 2017-08-28 14:28:41 0  1  1517