PHP 7 error handling tips: How to use the set_exception_handler function to send exception reports to the administrator's email

PHP 7 error handling skills: How to use the set_exception_handler function to send exception reports to the administrator's email

Introduction:
Error handling is a very important aspect when developing a PHP application. When an exception occurs, we hope to be able to learn about the problem in time so that we can take timely measures to deal with it. This article will introduce how to use the set_exception_handler function in PHP 7 to capture and send exception reports to the administrator's mailbox.

1. Understand the set_exception_handler function
The set_exception_handler function is an error handling function provided by PHP for catching and handling exceptions. By registering a custom exception handling function, we can customize the way exceptions are handled, such as sending exception information to the administrator's email.

The following is the basic usage of the set_exception_handler function:

set_exception_handler(callable $handler): void

The function parameter is a callable function or method name. When an exception occurs, PHP will call this function to handle the exception.

2. Configure email information
Before sending an exception report, we need to configure the administrator's email information. First, we need to set the SMTP server and email account information in the PHP configuration file. Open the php.ini file and find the following lines:

SMTP = smtp.example.com
smtp_port = 25
sendmail_from = your_email@example.com

Replace smtp.example.com with the real SMTP server address, 25 with the port number of the SMTP server, and your_email@example.com Replace it with the real administrator email account.

3. Write exception handling function
Next we can write a custom exception handling function to send exception reports to the administrator's mailbox. The following is an example:

function exceptionHandler($exception) {
    $to = 'admin@example.com'; // 管理员邮箱
    $subject = '异常报告';
    $message = "异常信息：" . $exception->getMessage() . "
";
    $message .= "异常文件：" . $exception->getFile() . "
";
    $message .= "异常行号：" . $exception->getLine() . "
";
    $headers = 'From: your_email@example.com' . "
" .
               'Reply-To: your_email@example.com' . "
" .
               'X-Mailer: PHP/' . phpversion();

    mail($to, $subject, $message, $headers);
}

In the above code, we define a function called exceptionHandler, whose parameter is an exception object. In the function, we splice the information of the exception object into a string and send the email to the administrator's mailbox through the mail function.

4. Register exception handling function
We need to register a custom exception handling function at the entrance of the application in order to catch and handle exceptions. The following is an example:

set_exception_handler('exceptionHandler');

In the above code, we pass the custom exception handling function exceptionHandler to the set_exception_handler function to register the exception handling function. In this way, when an exception occurs, PHP will call the exceptionHandler function to handle the exception.

5. Test exception handling
We can write a simple PHP script to test our exception handling function. Here is an example:

try {
    // 发生一个异常
    throw new Exception('测试异常');
} catch (Exception $e) {
    // 捕获并处理异常
    exceptionHandler($e);
}

In the above code, we use try-catch block to catch the exception and call our exception handling function to handle the exception. When this script is run, the exception handling function will be called and an exception report will be sent to the administrator's email.

6. Summary
This article introduces how to use the set_exception_handler function in PHP 7 to capture and send exception reports to the administrator's mailbox. By customizing the exception handling function, we can learn about the problem in time when an exception occurs and take measures to deal with it. I hope this article will help you with PHP error handling!

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