Detailed introduction to default mode

Use exception mode -PDO::ERRMODE_EXCEPTION (Method 3 for capturing errors in SQL statements in PDO) exception mode will create a PDOException and set the erorCode attribute, which can encapsulate the execution code into a try{...}catch In the {...} statement, uncaught exceptions will cause the script to interrupt and display a stack trace to let the user understand where the problem occurred! In the first two articles "Using the default mode-PDO::ERRMODE_SILENT (Method 1 to capture errors in SQL statements in PDO)" and "Using warning mode-PDO::ERRMODE_WARNING (Method 2 to capture errors in SQL statements in PDO)" We have introduced two methods: default mode and exception mode, so today we will introduce the third method to capture errors in SQL statements in PDO ~ Another very useful thing about exception mode is that it can be clearer than traditional PHP style warnings You can easily build your own error handling, and exception mode requires less code/nesting than silent mode and explicitly checking the return value of each database call. Except

1. Recommended articles about exception patterns

# #Introduction: Use exception mode -PDO::ERRMODE_EXCEPTION (Method 3 to capture errors in SQL statements in PDO) Exception mode will create a PDOException and set the erorCode attribute, which can encapsulate the execution code into a try{...}catch In the {...} statement, uncaught exceptions will cause the script to interrupt and display a stack trace to let the user understand where the problem occurred! In the first two articles "Using the default mode-PDO::ERRMODE_SILENT(Capturing S in PDO...

2. Recommended articles about PDO::ERRMODE_EXCEPTION

Introduction: Using exception mode-PDO::ERRMODE_EXCEPTION (Capturing errors in SQL statements in PDO three) exceptions The mode will create a PDOException and set the erorCode attribute, which can encapsulate the execution code into a try{...}catch{...} statement. The uncaught exception will cause the script to interrupt and display the stack trace to let the user Understand where the problem occurs! In the first two articles "Using the default mode-PDO::ERRMODE_SILENT(PDO to capture S...

3. How to errorCode() Use? Summary of errorCode() instance usage

Introduction: Method 1 of error handling in PDO-errorCode( ) method in PDO has two methods for obtaining error information in the program: errorCode() method and errorInfo() method! In the next article, we will introduce these two methods to you one by one! Here are three ways to capture errors in SQL statements in PDO. If you are still unfamiliar or don’t understand, you can review "Using the default mode - PDO::ERRMODE_SILENT (Methods to capture errors in SQL statements in PDO 1.. .

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Use the default mode-PDO::ERRMODE_SILENT (Method 1 to capture errors in SQL statements in PDO)

Introduction: There are three options to choose from to capture SQL statement errors in PDO. Choose the appropriate solution to capture SQL statement errors according to your own development project and actual situation. Error!

##5. Capturing SQL statements in PDO

Introduction: Capturing SQL statements in PDO Error in: Use the default mode -----PDO::ERRMODE_SILENT to set the errorCode attribute of the PDOStatement object in the default mode, but do not perform any other operations. For example: add data to the database through the prepare() and execute() methods. , set the erroCode attribute of the PDOStatement object, and manually detect errors in the code. The steps are as follows $dbms=mysql;//Database type. $dbName=admin;//Database used

6. Oracle data pump: impdp and expdp

Introduction: In parallel mode, the status screen will display four worker processes. (In default mode, only one process is visible) All worker processes fetch data synchronously and display it in the status screen

7. PostgreSQL Default Mode Order and Change

Introduction: PostgreSQL has the concept of schema, which actually divides the range in the database, that is, in There can be tables with the same name in different schemas. It can be simply understood as a file system

8. Exploiting Common Vulnerabilities in PHP Applications is indeed written very well. It takes into account many aspects. This article of mine is just a continuation of the article and adds some other issues that have not been mentioned much. This article focuses on solving the problem, not the attack. 1. The ancient deceptive SQL statement is in the default mode, even if you forget to put php.ini

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Introduction: Shaun Clowes’s article Exploiting Common Vulnerabilities in PHP Applications is indeed very well written. It takes into account many aspects. My article is just a continuation of the story and adds some other issues that have not been mentioned much. . This article focuses on problem solving, not attacks. 1. The ancient deceptive SQL statement is in the default mode, even if you forget to copy php.ini

10. Briefly talk about javascript code reuse mode_javascript skills

Introduction: This article mainly talks about the JavaScript code reuse mode briefly. It mainly introduces the default mode in the class inheritance mode in detail. I hope you will like it.

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