Run the shell command in php in linux to view the server name.

Today, we have a small requirement: how to display the server's machine name on the webpage. in Ubuntu, you only need to enter the command uname-n to see it (Redhat is the same ), so I wonder if php can directly call the shell command to execute this operation? After reading the information, I learned that there is indeed, and there is good... syntaxHighlighter. all (); how to display the server's machine name on the webpage is a small demand today. in Ubuntu, you only need to enter the command: uname-n to see it (Redhat is the same ), so I wonder if php can directly call the shell command to execute this operation? After reading the information, I learned that there are indeed, and there are several: popenfpassthrushell_execexecsystem. after reading the usage method, it seems that shell_exec is relatively simple. just input the command as a parameter, in addition, the result after the command is executed is directly returned, so I tried: <? Phpshell_exec ('uname-n');?> The machine name of the current server is displayed successfully. However, if the server is purchased, the test may not be successful, because for security reasons, the server may disable some or all of them.