Detailed introduction to php troubleshooting

The largest switch/case statement I have ever seen in an object-oriented program had over 20 conditions. During runtime, this code module executes all conditions every time. Each condition is responsible for creating a new object, which is used to communicate with external uses of the application's API. After performing some general troubleshooting on one of them, I started looking at the interfaces implemented by the application. To my surprise, every class referenced in the switch/case statement is implementing the same interface! When later adding new conditional statements to the switch/case statement, I recommend using the factory pattern instead. What is factory pattern? The Factory design pattern provides an interface for obtaining a new instance of an object while enabling the calling code to avoid determining the steps to actually instantiate the base class. As PHP has grown and evolved as a language, its features have continued to provide ease of development through the application of proven design patterns. A particularly useful feature in PHP is the ability to create new instances of a class based on the contents of variables. This dynamic method of object instantiation is a code block building approach to implementing the Factory design pattern in PHP. Based on the factory design pattern

1. PHP advanced object-oriented design pattern: Factory pattern usage examples

Introduction: The largest switch/case statement I have ever seen in an object-oriented program had over 20 conditions. During runtime, this code module executes all conditions every time. Each condition is responsible for creating a new object, which is used to communicate with external uses of the application's API. After performing some general troubleshooting on one of them, I started looking at the interfaces implemented by the application. To my surprise, every class referenced in the switch/case statement is implementing the same interface! When later adding new conditional statements to the switch/case statement, I recommend using the factory pattern instead.

2. Detailed explanation of online MYSQL synchronization error troubleshooting method code summary

##Introduction: The editor below will bring you a summary of online MYSQL synchronization error handling methods (a must-read article). The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor to take a look

3. The local computer cannot start Apache troubleshooting, apache troubleshooting_PHP tutorial

Introduction: The local computer cannot start Apache troubleshooting, apache troubleshooting. The local computer cannot start Apache troubleshooting, apache troubleshooting Recently, due to work needs, I have to learn basic programming of PHP, so I learned to set up a PHP working environment. But according to the introduction in the textbook

4. The local computer cannot start Apache troubleshooting, apache troubleshooting

Introduction: The local computer cannot start Apache troubleshooting, apache troubleshooting. The local computer cannot start Apache troubleshooting, apache troubleshooting Recently, due to work needs, I have to learn basic programming of PHP, so I learned to set up a PHP working environment. But according to the introduction in the textbook

5. Oracle database system emergency fault handling method

Introduction: Oracle database system emergency Troubleshooting method

6. oracle ora-01172,01151 Detailed troubleshooting tutorial

Introduction: This article introduces Here is a detailed tutorial on Oracle ora-01172, 01151 fault handling. Students in need can refer to the 01151 fault handling method.

7. ora-04301 troubleshooting in oracle

Introduction: This article will introduce how to use oracle database There is a solution to the 04301 error. If you encounter the same problem, you can refer to this article to solve it. Use this article as a note.

8. ORA-10567 troubleshooting

Introduction: 1: Scenario description Database version: 11.2.0.164bitactivedataguard Operating system version: centos5.864bit A routine database check in the morning found that the undo table space data file was too large. After querying the largest block,

9. Master-slave fault handling--session level parameter replication error

Introduction: Accept new projects, master-slave database Copy synchronization error, ErrorCode1292 (invaliddatatype) error SQL: updatewavesetIS_WAVED=0,LEVEL=1,SOURCE_TB_NAME=null,SOURCE_ID=null,UPDATE

10. ORA-30036 fault handling Idea

Introduction: The fault phenomenon is that the application side of a certain provincial settlement library found the error ORA-30036:unabletoextendsegmentby8inundotablespaceUNDOTBS1 when running the stored process, and then conducted the following series of troubleshooting and analysis: View undo tablespace

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