1) Add to your Apache configuration following switches:

<IfDefine php53>
    PHPIniDir "Path/To/PHP-5.3/"
    LoadModule php5_module "Path/To/PHP-5.3/php5apache2_4.dll"
    AddHandler application/x-httpd-php .php
</IfDefine>

<IfDefine php54>
    PHPIniDir "Path/To/PHP-5.4/"
    LoadModule php5_module "Path/To/PHP-5.4/php5apache2_4.dll"
    AddHandler application/x-httpd-php .php
</IfDefine>

<IfDefine php55>
    PHPIniDir "Path/To/PHP-5.5/"
    LoadModule php5_module "Path/To/PHP-5.5/php5apache2_4.dll"
    AddHandler application/x-httpd-php .php
</IfDefine>

<IfDefine php56>
    PHPIniDir "Path/To/PHP-5.6/"
    LoadModule php5_module "Path/To/PHP-5.6/php5apache2_4.dll"
    AddHandler application/x-httpd-php .php
</IfDefine>

<IfDefine php7>
    PHPIniDir "Path/To/PHP-7/"
    LoadModule php7_module "Path/To/PHP-7/php7apache2_4.dll"
    AddHandler application/x-httpd-php .php
</IfDefine>

2) Define multiple service instances:

Path/To/Apache/bin/httpd.exe -k install -n PHP-5.3 -D php53
Path/To/Apache/bin/httpd.exe -k install -n PHP-5.4 -D php54
Path/To/Apache/bin/httpd.exe -k install -n PHP-5.5 -D php55
Path/To/Apache/bin/httpd.exe -k install -n PHP-5.6 -D php56
Path/To/Apache/bin/httpd.exe -k install -n PHP-7 -D php7