Programming in PHP for command line

Foreword

Ubuntu provides the apache2 bundle utilities for turning on / off virtual hosts and modules. However, creating configs for virtual hosts takes extra time. Therefore, I wanted to correct this flaw. It was possible, of course, to make automatic subdomains for Apache, but I decided to write a script that creates virtual hosts configuration files for Apache, and, if necessary, adds the host name to the / etc / hosts file. I do not write scripts very well in bash, so I decided to use PHP for my fairly simple task, which I also know quite well.
So, in this article, we will do two useful things at once: let's get acquainted with the input / output operations of the command line in PHP and write a script that will make life a little easier for us.

Authorization Check

, , PHP
#!/usr/bin/env php
Linux.

, , , , root . :

1. $virtual_hosts_dir = "/etc/apache2/sites-available/";
2. if (!is_dir($virtual_hosts_dir) || !is_writable($virtual_hosts_dir))
3. {
4.     echo "You must run this script as root!\n";
5.     exit;
6. }

, , . , , . PHP $argc $argv. , — . - — . , :

1. if ($argc>1) 
2. { 
3.     for ($i=1; $i<$argc; $i++) 
4.     { 
5.         $option = explode("=", $argv[$i]); 
6.         switch ($option[0]) 
7.         { 
8.             case "-h": 
9.             case "--add-to-hosts": 
10.                 $add_to_hosts = true; 
11.             break;
12.  
13.             case "-n": 
14.             case "--no-add-to-hosts": 
15.                 $add_to_hosts = false; 
16.             break;
17.  
18.             case "-a": 
19.             case "--server-alias": 
20.                 if (isset($option[1])) 
21.                 { 
22.                     $server_alias = $option[1]; 
23.                 } 
24.                 else 
25.                 { 
26.                     echo "Wrong option: {$argv[$i]}\n"; 
27.                 } 
28.             break;
29.  
30.             case "-d": 
31.             case "--document-root": 
32.                 if (isset($option[1])) 
33.                 { 
34.                     if ($option[1] == "default") 
35.                     { 
36.                         $document_root = $default_doc_root 
37.                     } 
38.                     else if (is_dir(dirname($option[1]))) 
39.                     { 
40.                         $document_root = $option[1]; 
41.                     } 
42.                 } 
43.                 else 
44.                 { 
45.                     echo "Wrong option: {$argv[$i]}\n"; 
46.                 } 
47.             break;
48.  
49.             default: 
50.                 if (substr($argv[$i], 1, 1) == '-') 
51.                 { 
52.                     echo "Unknown option: {$argv[$i]}\n"; 
53.                 } 
54.             break; 
55.         } 
56.     } 
57. }
58.  

\

. , . \, . PHP \ STDIN, STDOUT, STDERR. , . , :

1. $line = fgets(STDIN);

$line. , , .. PHP . , , . , \ :

1. $stdin = fopen("php://stdin", "r");
2. $line1 = gets($stdin);
3. $line2 = gets($stdin);
4. fclose($stdin);

, .
, echo.

. - , , - :

1. while (!$server_alias)
2. {
3.     echo "Enter your hostname: ";
4.     $server_alias = trim(fgets(STDIN));
5. }

, , /etc/hosts, , . , /etc/hosts, , Enter :

1. if ($add_to_hosts === null)
2. {
3.     echo "Add $server_alias to your /etc/hosts ? (Y/N) [Y]: ";
4.     $line = trim(fgets(STDIN));
5.     if ($line == 'n' || $line == 'N')
6.     {
7.         $add_to_hosts = false;
8.     }
9.     else
10.     {
11.         $add_to_hosts = true;
12.     }
13. }

:

1. if (!$document_root) 
2. { 
3.     $default_doc_root = $default_doc_root.'/'.$server_alias; 
4.     echo "Enter your document root [$default_doc_root]: "; 
5.     $line = trim(fgets(STDIN)); 
6.     if ($line && is_dir(dirname($line))) 
7.     { 
8.         $document_root = $line; 
9.     } 
10.     else 
11.     { 
12.         $document_root = $default_doc_root; 
13.     } 
14. }
15.  

-

, , , . , , — :

1. if (!is_dir($document_root))
2. {
3.     mkdir($document_root);
4. }

/etc/hosts. , :

1. if ($add_to_hosts)
2. {
3.     $hosts = file_get_contents("/etc/hosts");
4.     $hosts .= "127.0.0.1\t$server_alias\n";
5.     file_put_contents("/etc/hosts", $hosts);
6. }

:

1. $host_template = <<<HOST
2. <VirtualHost *:80> 
3. ServerAdmin i@bogus.in 
4. ServerAlias $server_alias
5.  
6. DocumentRoot $document_root 
7. <Directory $document_root> 
8.     Options Indexes FollowSymLinks MultiViews 
9.     AllowOverride All 
10.     Order allow,deny 
11.     allow from all 
12. </Directory>
13.  
14. ErrorLog ${APACHE_LOG_DIR}/$server_alias-error.log; 
15. LogLevel warn 
16. CustomLog ${APACHE_LOG_DIR}/$server_alias-access.log combined
17. </VirtualHost>
18. HOST;
19.  

, a2ensite:

1. file_put_contents("/etc/apache2/sites-available/$server_alias", $host_template); 
2. echo "Apache config for this hostname created successfully! Don't forget to run a2ensite $server_alias\n";
3.  

. +x, :
chmod +x a2addsite

. :
% sudo ./a2addsite
Add test.local to your /etc/hosts? (Y/N) [Y]:
Enter your document root [/home/www/test.local]:
Apache config for this hostname created successfully! Don't forget to run a2ensite test.local

:
% sudo ./a2addsite --server-alias=test2.local --add-to-hosts --document-root=default
Apache config for this hostname created successfully! Don't forget to run a2ensite test2.local

PHP , . , , - .

, PHP PHP (.):
Command line usage
PHP input/output