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This article introduces the relevant knowledge of "PHP error handling example Analysis". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Show a simple script that opens a text file:

If the file does not exist, you will get an error like this:

Warning: fopen (welcome.txt) [function.fopen]: failed to open stream:No such file or directory in C:webfoldertest.php on line 2

To prevent users from getting an error message similar to the above, we detect the existence of the file before accessing the file:

Now, if the file does not exist, you will get an error message like this:

File not found

The above code is more efficient than the previous code because it uses a simple error handling mechanism to terminate the script after the error.

However, simply terminating the script is not always the appropriate way. Let's look at alternative PHP functions for handling errors.

Create a custom error handler

Creating a custom error handler is very simple. We have simply created a dedicated function that can be called when an error occurs in PHP.

The function must be able to handle at least two parameters (error level and error message), but can accept up to five parameters (optional: file, line-number, and error context):

Grammar

Error_function (error_level,error_message,error_file,error_line,error_context)

Parameters.

Description

Error_level is required. Sets the error reporting level for user-defined errors. It has to be a number. See the following table: error reporting levels.

Error_message is required. Specify error messages for user-defined errors.

Error_file is optional. Specifies the file name where the error occurred.

Error_line is optional. Specifies the line number where the error occurred.

Error_context is optional. Specifies an array that contains each variable in use when an error occurs and their values.

This is the end of "PHP error handling example Analysis". Thank you for your reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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