Fix xdebug and pcov on PHP7.4 and restructre code

src/scripts/win32.ps1

@@ -0,0 +1,41 @@
+param (
+    [Parameter(Mandatory=$true)][string]$version = "7.3"  
+)
+
+if($version -eq '7.4') {
+	$version = '7.4RC'
+}
+
+echo "Installing PhpManager"
+Install-Module -Name PhpManager -Force -Scope CurrentUser
+
+$installed = $($(php -v)[0] -join '')[4..6] -join ''
+if($installed -ne $version) {
+  if($version -lt '7.0') {
+    echo "Installing VcRedist"
+    Install-Module -Name VcRedist -Force
+  }
+  echo "Installing PHP"
+  Uninstall-Php C:\tools\php
+  Install-Php -Version $version -Architecture x86 -ThreadSafe $true -InstallVC -Path C:\tools\php$version -TimeZone UTC -InitialPhpIni Production -Force
+  echo "Switch PHP"
+  (Get-PhpSwitcher).targets
+  Initialize-PhpSwitcher -Alias C:\tools\php -Scope CurrentUser -Force
+  Add-PhpToSwitcher -Name $version -Path C:\tools\php$version -Force
+  Switch-Php $version -Force
+}
+
+echo "Housekeeping in PHP.ini, enabling openssl"
+Add-Content C:\tools\php\php.ini "date.timezone = 'UTC'"
+Set-PhpIniKey extension_dir C:\tools\php\ext
+if($version -lt '7.4') {
+  Enable-PhpExtension openssl
+} else {
+  Add-Content C:\tools\php\php.ini "extension=php_openssl.dll"
+}
+
+echo "Installing Composer"
+Install-Composer -Scope System -Path C:\tools\php
+$ext_dir = Get-PhpIniKey extension_dir
+php -v
+composer -V