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Network programming tutorial

The role of java environment variables

The functions of java environment variables: 1. If the JAVA_HOME variable is not configured, Tomcat cannot start normally. 2. PATH environment variable. The function is to specify the java command search path. 3. CLASPATH environment variable tells the Ja

2022-05-19
What is the core architecture of PHP

PHP core architecture: 1. Zend is part of the PHP core. 2. Extensions provide various basic services in a component-based manner. 3. Sapi is the server application programming interface. 4. Application is the PHP program we usually write.

2022-05-19
How to use strval() function in PHP

Usage of strval() function in PHP: 1. It is a built-in function in PHP that is used to convert any standard value (string, integer or double) to a string. 2. strval cannot be used in arrays or objects. If used, this function simply returns the type name o

2022-05-19
How to intercept php string

PHP string interception methods: 1. Chinese interception: mb_substr(). 2. English interception: use the substr() function. If the intercepted string is multiple bytes, garbled characters will appear. 3. $str[0], treats strings as character sets, not appli

2022-05-18
What are PHP internal functions

Introduction to PHP internal functions: 1. Functions declared inside the function are internal functions. 2. Please note that after calling the external function, you can call the internal function at will. Internal functions can be called within a functi

2022-05-18
What are the ways to block errors in PHP?

2022-05-17
php rtrim() function deletes characters

2022-05-17
How to implement n factorial in php

2022-05-17
What are the Java thread states?

Java thread status: 1. New, which is a thread that has not been started after creation. 2. Running, operating system thread status. 3. Waiting indefinitely will not be allocated processor execution time. 4. Wait within the time limit. 5. Blockage. 6. End,

2022-05-17
Sorting out php regular replacement functions

2022-05-17
Solution to the problem that php cannot generate images

2022-05-17
Java operations for building JDBC applications

The operations of building a JDBC application in Java: 1. Load the database driver; 2. Obtain the database connection; 3. Create the Statement object through the Connection object; 4. Statement executes the SQL statement; 5. Operate the result set; 6. Rec

2022-05-17
Classification solutions for java exception handling

2022-05-17
On-demand loading of Composer in php

2022-05-16
Use of Cglib proxy in java

The use of Cglib agents in java: 1. Cglib agents can be called subclass agents, which build subclass objects in memory to extend the functions of the target object. 2. Cglib generates a proxy class through Enhancer and implements the intercept method by i

2022-05-13

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