How to solve the problem that php does not start port 9000

With the continuous development of the Internet era, the programming language PHP has attracted more and more attention. As a PHP programmer, we often encounter some problems. For example, we often hear others say "Port 9000 is not started." Today, we will discuss the causes and solutions to this problem.

1. Reasons

PHP web services usually run on the local server, so they need to rely on the network environment of the local computer. When we use the PHP web service, if the 9000 port of our computer is not started, then the error message "Port 9000 is not started" will appear when using the PHP web service.

There are many reasons why port 9000 is not started. The following are common ones:

1. The local computer port is occupied

When using the PHP service, you may find that your 9000 port is occupied. At this time, we need to check first. See which program is occupying the port, and then free the port by closing that program.

2. The PHP service does not start normally

If we do not start the PHP service correctly, or the PHP service fails to start due to some unknown reasons, the 9000 port will not start normally.

3. The PHP service process exits abnormally

When using the PHP service, if our PHP service process exits abnormally, the 9000 port will be in an unstarted state the next time the service is started.

2. Solution

When the error "Port 9000 is not started" occurs, we need to find the root cause of the problem and solve it in time to restore the service in time. Below, we have summarized some common solutions for your reference.

1. Check whether the local computer port is occupied

If the above problem occurs, you need to check whether the local computer port 9000 is occupied as soon as possible. You can check by following the following steps:

• 1) Use the CMD command window that comes with Windows and enter "netstat -ano" in the CMD command line window to view the status of the local port that is currently in the listening state.

C:\Users\howt是否运行cmd 进入cmd
netstat -ano

• 2) Find the port related to TCP segment port 9000

• 3) View the PID of the process ( process number).

  PID is the unique identifier of the windows process. The PID values ​​of all processes in the system can be queried through specific commands or the task manager.

• 4) After the actual PID value of the process, find the corresponding process.

• 5) Close the process that is occupying port 9000.

2. Restart the PHP service

When no problem is found after checking whether the local port is occupied, we need to try to restart the PHP service. Before restarting the PHP service, we first need to confirm whether the PHP service is installed. If it is not installed yet, it needs to be installed first.

After the PHP service is installed, restart the PHP service through the following steps:

• 1) Open the terminal and enter the PHP installation path.

• 2) Execute php-cgi -b 127.0.0.1:9000

• 3) At this time, open the PHP-FPM configuration file php .ini

Release the following statement comments:

cgi.fix_pathinfo=0

3. Check the PHP service process

Sometimes there is an error that port 9000 is not started. It may be caused by the abnormal exit of the PHP service process, then we need to check whether the PHP service is running normally. We can check in the following ways:

• 1) Check the PHP service process

ps aux | grep php-fpm

• 2) If PHP is found The service process exits abnormally. We can try to restart the PHP service process through php-fpm -c /etc/php/7.4/fpm/php.ini -g /run/php/php7.4-fpm.pid.

4. Modify the local computer port

If the above operations do not solve the problem, we can try to modify the local computer port. We can change the port that the PHP service listens on from port 9000 to another port, and solve the problem of port 9000 not starting by modifying the port number in the configuration file.

In short, if there is a problem that port 9000 is not started, we need to patiently investigate the root cause of the problem and find a suitable solution. I believe that through continuous efforts and exploration, we will eventually solve this problem successfully.

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