Nginx encountered 502 Bad Gateway automatic restart script code

The idea is to get the HTTP header with curl, find the 502 status code, and execute the command to restart php-fpm.

 
#!/usr/bin/php 
<!--$url = '//www.jb51.net'; 
$cmd = '/usr/local/php/sbin/php-fpm restart'; 

for($i = 0; $i < 5; $i ++){ $exec = "curl connect-timeout 3 -I $url 2>/dev/null"; 
$res = shell_exec($exec); 

if(stripos($res, '502 Bad Gateway') !== false){ 
shell_exec($cmd); 
exit(); 
} 
} 
--> 

For crontab, please search for Google or refer to the following article
//www.jb51.net/LINUXjishu/19905.html
//www.jb51.net/LINUXjishu/17374.html