src/Install-Php.psm1

using namespace Belin.Cli.Validation

<#
.SYNOPSIS
    Downloads and installs the latest PHP release.
.OUTPUTS
    The output from the `php --version` command.
#>

function Install-Php {
    [CmdletBinding()]
    [OutputType([string])]
    param (
        # The path to the output directory.
        [Parameter(Position = 0)]
        [ValidateScript({ Test-Path $_ -IsValid }, ErrorMessage = "The specified output path is invalid.")]
        [string] $Path = "C:\Program Files\PHP",

        # Value indicating whether to register the PHP interpreter with the event log.
        [Parameter()]
        [switch] $RegisterEventSource
    )

    if (-not $IsWindows) { throw [PlatformNotSupportedException] "This command only supports the Windows platform." }
    if (-not (Test-Privilege $Path)) { throw [UnauthorizedAccessException] "You must run this command in an elevated prompt." }

    "Fetching the list of PHP releases..."
    $response = Invoke-RestMethod "https://www.php.net/releases/?json"
    $property = ($response | Get-Member -MemberType NoteProperty | Sort-Object Name -Bottom 1).Name
    $version = [version] $response.$property.version

    $file = "php-$version-nts-Win32-$($version -ge [version] "8.4.0" ? "vs17" : "vs16")-x64.zip"
    "Downloading file ""$file""..."
    $outputFile = New-TemporaryFile
    Invoke-WebRequest "https://downloads.php.net/~windows/releases/archives/$file" -OutFile $outputFile

    "Stopping the IIS web server..."
    Stop-Service W3SVC

    "Extracting file ""$file"" into directory ""$Path""..."
    Expand-Archive $outputFile $Path -Force

    "Starting the IIS web server..."
    Start-Service W3SVC

    if ($RegisterEventSource) {
        "Registering the PHP interpreter with the event log..."
        $key = "HKLM:\SYSTEM\CurrentControlSet\Services\EventLog\Application\PHP-$version"
        New-Item $key -Force | Out-Null
        New-ItemProperty $key EventMessageFile -Force -PropertyType String -Value (Join-Path $Path "php$($version.Major).dll" -Resolve) | Out-Null
        New-ItemProperty $key TypesSupported -Force -PropertyType DWord -Value 7 | Out-Null
    }

    & "$Path/php.exe" --version
}