Update install.php to prevent creating an empty config.php file

I agree to the conditions of the Contributor Agreement contained in doc/General/Contributing.md.

AUTHORS.md

@@ -23,7 +23,6 @@ Contributors to LibreNMS:
 - Stuart Henderson <stu@spacehopper.org> (sthen)
 - Filippo Giunchedi <filippo@esaurito.net> (filippog)
 - Lasse Leegaard <lasse@brandbil.dk> (lasseleegaard)
+- Mohammad Al-Shami <mohammad@al-shami.net> (mohshami)
 
 [1]: http://observium.org/ "Observium web site"
-
-

html/install.php

@@ -33,7 +33,7 @@ include("../includes/defaults.inc.php");
 // Work out the install directory
 $cur_dir = explode('/',$_SERVER['DOCUMENT_ROOT']);
 $install_dir = array_pop($cur_dir);
-$install_dir = array_pop($cur_dir);
+#$install_dir = array_pop($cur_dir);
 $install_dir = implode('/',$cur_dir);
 $config['install_dir'] = $install_dir;
 $config['log_dir'] = $install_dir.'/logs';
@@ -409,9 +409,9 @@ EOD;
   if(!file_exists("../config.php"))
   {
     $conf = fopen("../config.php", 'w');
-    if ($conf === false)
+    if ($conf != false)
     {
-      if(fwrite($handle, '<?php') === FALSE)
+      if(fwrite($conf, "<?php\n") === FALSE)
       {
         echo("<div class='alert alert-danger'>We couldn't create the config.php file, please create this manually before continuing by copying the below into a config.php in the root directory of your install (typically /opt/librenms/)</div>");
         echo("<pre>&lt;?php\n".stripslashes($config_file)."</pre>");
@@ -419,7 +419,7 @@ EOD;
       else
       {
         $config_file = stripslashes($config_file);
-        fwrite($handle,$config_file);
+        fwrite($conf,$config_file);
         echo("<div class='alert alert-success'>The config file has been created</div>");
       }
     }