Solution to PHP7-FPM failure to start on Linux

PHP7-FPM is a very popular PHP FastCGI process manager for processing PHP scripts on Linux servers. However, sometimes you may encounter some problems when starting PHP7-FPM, causing the startup to fail. This article will provide solutions to the common problem of PHP7-FPM failing to start on Linux, including specific code examples.

Question 1: Configuration file error

The configuration file of PHP7-FPM is usually php-fpm.conf or www.conf, if configured There are errors in the file, which will cause PHP7-FPM to fail to start. In this case, we need to check whether there are syntax errors or illegal configuration options in the configuration file.

Solution:

# 检查配置文件语法是否正确
sudo php-fpm -t

# 查看错误日志，定位具体问题
tail -f /var/log/php7.0-fpm/error.log

Problem 2: The port is occupied

If the port used by PHP7-FPM is already occupied by other processes, then PHP7-FPM will not be able to start. In this case, we need to find the process occupying the port and terminate it or change the port configuration of PHP7-FPM.

Solution:

# 查找占用80端口的进程
sudo netstat -tulnp | grep :80

# 结束占用80端口的进程
sudo kill -9 <PID>

# 修改PHP7-FPM端口配置
sudo vi /etc/php/7.0/fpm/pool.d/www.conf
# 修改listen = 127.0.0.1:9000为其他可用端口

Problem 3: Permission problem

PHP7-FPM needs sufficient permissions to run. If the permissions are incorrect, it will cause the startup to fail. Typically, PHP7-FPM runs as the www-data user, so you need to ensure that the relevant folders and files are readable and writable by that user.

Solution:

# 修改文件夹和文件权限
sudo chown -R www-data:www-data /var/www/html

# 重新启动PHP7-FPM
sudo systemctl restart php7.0-fpm

Summary:

Failure to start PHP7-FPM on a Linux server may be caused by configuration file errors, port occupation, or permission issues. . Through the solutions and code examples provided in this article, we can quickly locate the problem and solve the problem of PHP7-FPM startup failure. I hope it can help readers successfully solve the problem of PHP7-FPM startup failure and ensure that PHP scripts run normally.

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