XAMPP + PHP 7.0 FCGI

httpd-xampp.conf

#
# XAMPP settings
#

<IfModule env_module>
    SetEnv MIBDIRS "C:/xampp/php/extras/mibs"
    SetEnv MYSQL_HOME "\\xampp\\mysql\\bin"
    SetEnv OPENSSL_CONF "C:/xampp/apache/bin/openssl.cnf"
    SetEnv PHP_PEAR_SYSCONF_DIR "\\xampp\\php"
    SetEnv PHPRC "\\xampp\\php"
    SetEnv TMP "\\xampp\\tmp"
</IfModule>

#
# PHP-Module setup
#
# LoadFile "C:/xampp/php/php7ts.dll"
# LoadFile "C:/xampp/php/libpq.dll"
# LoadModule php7_module "C:/xampp/php/php7apache2_4.dll"

# <FilesMatch "\.php$">
#     SetHandler application/x-httpd-php
# </FilesMatch>
# <FilesMatch "\.phps$">
#     SetHandler application/x-httpd-php-source
# </FilesMatch>

#
# PHP-FastCGI setup
#
LoadModule fcgid_module modules/mod_fcgid.so

<IfModule fcgid_module>
	FcgidInitialEnv PATH "C:/xampp/php"
	FcgidInitialEnv SystemRoot "C:/Windows"
	FcgidInitialEnv SystemDrive "C:"
	FcgidInitialEnv TEMP "C:/xampp/tmp"
	FcgidInitialEnv TMP "C:/xampp/tmp"
	FcgidInitialEnv windir "C:/windows"
	FcgidIOTimeout 64
	FcgidConnectTimeout 16
	FcgidMaxRequestsPerProcess 1000 
	FcgidMaxProcesses 3
	FcgidMaxRequestLen 8131072
	# Location php.ini:
	FcgidInitialEnv PHPRC "C:/xampp/php"
	FcgidInitialEnv PHP_FCGI_MAX_REQUESTS 1000

	<Files ~ "\.php$">
		Options Indexes FollowSymLinks ExecCGI 
		AddHandler fcgid-script .php
		FcgidWrapper "C:/xampp/php/php-cgi.exe" .php
	</Files>
</IfModule>

<IfModule mime_module>
    AddType application/x-httpd-php .php
    AddType application/x-httpd-php .php3
</IfModule>

#
# PHP-CGI setup
#
#<FilesMatch "\.php$">
#    SetHandler application/x-httpd-php-cgi
#</FilesMatch>
#<IfModule actions_module>
#    Action application/x-httpd-php-cgi "/php-cgi/php-cgi.exe"
#</IfModule>


# <IfModule php7_module>
#    PHPINIDir "C:/xampp/php"
# </IfModule>

<IfModule mime_module>
    AddType text/html .php .phps
</IfModule>

ScriptAlias /php-cgi/ "C:/xampp/php/"
<Directory "C:/xampp/php">
    AllowOverride None
    Options None
    Require all denied
    <Files "php-cgi.exe">
          Require all granted
    </Files>
</Directory>

<Directory "C:/xampp/cgi-bin">
    <FilesMatch "\.php$">
        SetHandler cgi-script
    </FilesMatch>
    <FilesMatch "\.phps$">
        SetHandler None
    </FilesMatch>
</Directory>

<Directory "C:/xampp/htdocs/xampp">
    <IfModule php7_module>
    	<Files "status.php">
    		php_admin_flag safe_mode off
    	</Files>
    </IfModule>
    AllowOverride AuthConfig
</Directory>

<IfModule alias_module>
    Alias /licenses "C:/xampp/licenses/"
    <Directory "C:/xampp/licenses">
        Options +Indexes
        <IfModule autoindex_color_module>
            DirectoryIndexTextColor  "#000000"
            DirectoryIndexBGColor "#f8e8a0"
            DirectoryIndexLinkColor "#bb3902"
            DirectoryIndexVLinkColor "#bb3902"
            DirectoryIndexALinkColor "#bb3902"
        </IfModule>
        Require local
        ErrorDocument 403 /error/XAMPP_FORBIDDEN.html.var
   </Directory>

    Alias /phpmyadmin "C:/xampp/phpMyAdmin/"
    <Directory "C:/xampp/phpMyAdmin">
        AllowOverride AuthConfig
        Require local
        ErrorDocument 403 /error/XAMPP_FORBIDDEN.html.var
    </Directory>

    Alias /webalizer "C:/xampp/webalizer/"
    <Directory "C:/xampp/webalizer">
        <IfModule php7_module>
    		<Files "webalizer.php">
    			php_admin_flag safe_mode off
    		</Files>
        </IfModule>
        AllowOverride AuthConfig
        Require local
        ErrorDocument 403 /error/XAMPP_FORBIDDEN.html.var
    </Directory>
</IfModule>

Might help later if you cant start Apache after following the above mentioned steps:
https://stackoverflow.com/a/28784598/2229148