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    <p>I'm not sure I understand what CI has to do with virtual hosts, but as of late, I created my own VHost functions:</p> <pre><code>define('VHOST_FILE','/etc/httpd/conf.d/vhost.conf'); /** * Generate Apache vhost entry. * @param string $domain Domain or subdomain name (eg: foo.example.com or example.biz). * @param string $path Path to document root. * @return string The generated vhost entry. */ function vhost_gen($domain,$path){ $eol=ISWIN ? CRLF : LF; return '&lt;VirtualHost *:80&gt;'.$eol. TAB.'ServerName '.str_replace(array(' ',CR,LF,TAB,NULL),'',$domain).$eol. TAB.'DocumentRoot "'.str_replace(array(CR,LF,TAB,NULL),'',$path).'"'.$eol. '&lt;/VirtualHost&gt;'.$eol.$eol; } /** * Writes the new vhost config file. * @param array $items List of objects(domain,docroot) used in config. */ function vhost_write($items){ $eol=ISWIN ? CRLF : LF; $data='NameVirtualHost *:80'.$eol.$eol; foreach($items as $item) $data.=vhost_gen ($item-&gt;domain,$item-&gt;docroot); return @file_put_contents(VHOST_FILE,$data); } /** * Returns a list of vhost entries. * @return array List of objects(id,domain,docroot) entries. */ function vhost_read(){ $entries=array(); $lines=explode(LF,str_replace(CR,LF,@file_get_contents(VHOST_FILE))); $entry=null; foreach($lines as $line){ // parse line $line=explode(' ',str_replace(TAB,' ',trim($line)),2); if(isset($line[0]))$line[0]=strtolower(trim($line[0])); // state engine if($line[0]=='&lt;virtualhost'){ $entry=new stdClass(); continue; } if($line[0]=='&lt;/virtualhost&gt;' &amp;&amp; $entry!==null){ $entry-&gt;id=count($entries)+1; $entries[$entry-&gt;id]=$entry; $entry=null; continue; } if($line[0]=='servername' &amp;&amp; $entry!==null){ $entry-&gt;domain=str_replace('"','',trim($line[1])); continue; } if($line[0]=='documentroot' &amp;&amp; $entry!==null){ $entry-&gt;docroot=str_replace('"','',trim($line[1])); continue; } } return $entries; } /** * Backup vhost config file. * @return boolean True on success, false otherwise. */ function vhost_backup(){ if(!@file_exists(VHOST_FILE)) return @file_put_contents(VHOST_FILE,'') &amp;&amp; @copy(VHOST_FILE,ServerCentral::path().'vhost.conf.bak'); return @copy(VHOST_FILE,ServerCentral::path().'vhost.conf.bak'); } /** * Restore vhost backup file. * @return boolean True on success, false otherwise. */ function vhost_restore(){ return @copy(ServerCentral::path().'vhost.conf.bak',VHOST_FILE); } /** * Restarts apache/httpd service daemon. * @return boolean True on success, false otherwise. */ function httpd_restart(){ $r=System::execute('service httpd restart'); return $r['return']==0; } </code></pre> <p>Since I basically copy+pasted it, you might want to replace some stuff:</p> <ul> <li><code>ServerCentral::path()</code> - Absolute path to the current running script.</li> <li><code>System::execute</code> - Runs a shell command, works exactly like <a href="https://stackoverflow.com/questions/5673740/php-or-apache-exec-popen-system-and-proc-open-commands-do-not-execute-any-comm/5673872#5673872">this</a>.</li> <li><code>ISWIN</code> - Defined like this: <code>define('ISWIN', strpos(strtolower(php_uname()),'win')!==false &amp;&amp; strpos(strtolower(php_uname()),'darwin')===false );</code></li> </ul>
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    1. POsubdomains on localhost vs. production server under CodeIgniter
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    1. COThis looks interesting, particularly for localhost - wouldn't work on a shared serve though, would it? is that where the A-name suggestion BlueEel put out there below would come in? (also, CI probably has nothing to do with this, but I just mentioned all technologies involved)
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