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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  1014

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  1580

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 implements file uploading to a specified folder, and the file path or name is stored in the database. How to achieve this?

PHP implements file uploading to a specified folder, and the file path or name is stored in the database. How to achieve this?

2018-09-26 01:40:34 0  2  1355

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  648

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  1142

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  677

The difference between extend and implements

class Test extend Test1class Test implements Test1 Is there any expert who can explain the difference between extend and implements in detail? I don’t understand the examples on the Internet in detail.

拉拉韋爾 2020-06-12 17:50:33 0  1  1646

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  574

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  2020

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  647

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  3163

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  944

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  1518

Implementing observer pattern in PHP

// Implementation function: Notify security module and advertising module when logging in // Predefined interface: SplObserver observer and SplSubject observer class User implements SplSubject{protected $login_num; protected $hobby; protected $_subject; public function __const

只是沒有如果 2018-12-10 00:10:46 0  0  1205

Title rewritten to read: PHP 7 is no longer compatible with using deprecated PHP4-style class constructors

I'm trying to upgrade the PHP version of my WP website, which is hosted on SiteGround. The upgrade tool shows the following error: 33|WARNING|Using deprecated PHP4-style class constructors is not supported since PHP7 This is the code I found at the given location: functiongc_XmlBuilder($indent=''){$...

P粉713846879 2023-08-25 00:18:16 0  1  776

Questions encountered when testing multi-threaded execution in java?

Questions about multi-threaded execution of java time test? public class Cai implements Runnable { {code...} } public class Run { {code...} } When the test2 method is executed, why does it appear like: Thread 1 loop 0- 99, Thread 2 loops 0-10 and then the program ends. This is why...

ringa_lee 2017-05-17 10:01:14 0  2  807

PHP implements file upload function

I want to upload a file to a given folder. <?php$folder="upload/";if(is_uploaded_file($HTTP_POST_FILES['filename']['tmp_name'])){if(move_uploaded_file($HTTP_POST_FILES['filename']['tmp_name'],$folder. $HTTP_POST_FILES

P粉868586032 2024-03-25 18:04:14 0  2  838