PHP Script Running Twice

Question

Ok so I have a weird problem. I have a local XAMPP running and running Acrylic DNS Proxy as well. While I was testing some code I noticed that it was running the script twice. Here's what I got.

index.php

<?php
$myFile = "test.txt";
$fh = fopen($myFile, 'a') or die("can't open file");
$stringData = "1\n";
fwrite($fh, $stringData);
fclose($fh);
?>

.htaccess

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule . /index.php [L]
</IfModule>

AcrylicHosts.txt

127.0.0.1 test.com
127.0.0.1 *.test.com

Vhost File

<VirtualHost *:80>
    DocumentRoot /www/test
    ServerName test.com
    ServerAlias *.test.com
</VirtualHost>

<VirtualHost *:443>
    DocumentRoot /www/test
    ServerName test.com
    ServerAlias *.test.com
    SSLEngine On
    SSLOptions +StrictRequire
    SSLEngine on
    SSLCertificateFile conf/ssl.crt/server.crt
    SSLCertificateKeyFile conf/ssl.key/server.key
    SSLProtocol TLSv1
</VirtualHost>

If you go to test.com, the text.txt output is "1\n 1\n"

But if you go to www.test.com, the text.txt output is "1\n"

Anyone know what to do to get it to stop running twice?

Edit:

These are the versions I'm working with:

Apache 2.4.4
MySQL 5.5.32
PHP 5.4.19

Answer 1

It looks like it was because chrome was looking for favicon.ico (which caused a 404) and my .htaccess file points all 404s to index.php file which executed the code again.