private/Get-XdebugExtension.ps1

function Get-XdebugExtension() {
    <#
    .Synopsis
    Get the latest Xdebug version available on Xdebug website.

    .Parameter Version
    Specify the version of the extension (it can be for example '2.6.0', '2.6', '2').

    .Parameter MinimumStability
    The minimum stability flag of the package: one of 'stable' (default), 'beta', 'alpha', 'devel' or 'snapshot'.

    #>

    [OutputType([PSObject])]
    [OutputType()]
    param (
        [Parameter(Mandatory = $true, Position = 0, HelpMessage = 'The instance of PhpVersion for which you want the extensions')]
        [ValidateNotNull()]
        [PhpVersionInstalled]$PhpVersion,
        [Parameter(Mandatory = $false)]
        [ValidateNotNull()]
        [ValidatePattern('^(\d+(\.\d+){0,2})?$')]
        [string] $Version,
        [Parameter(Mandatory = $true)]
        [ValidateNotNull()]
        [ValidateSet('stable', 'beta', 'alpha', 'devel', 'snapshot')]
        [string] $MinimumStability
    )
    switch ($MinimumStability) {
        $Script:PEARSTATE_STABLE {
            $stabilityRxChunk = ''
        }
        $Script:PEARSTATE_BETA {
            $stabilityRxChunk = '(?:RC|beta)'
        }
        default {
            $stabilityRxChunk = '(?:RC|alpha|beta)'
        }
    }
    Write-Verbose 'Analyzing xdebug download page'
    $downloadPageUrl = 'https://xdebug.org/download'
    $downloadLinkRx = '^.*/php_xdebug-({0}(?:\.\d+)*){1}\d*-{2}-vc{3}{4}{5}\.dll$' -f @(
        @('\d+', [System.Text.RegularExpressions.Regex]::Escape($Version))[$Version -ne ''],
        $stabilityRxChunk,
        [System.Text.RegularExpressions.Regex]::Escape($PhpVersion.MajorMinorVersion),
        $PhpVersion.VCVersion,
        @('-nts', '')[$PhpVersion.ThreadSafe]
        @('', '-x86_64')[$PhpVersion.Architecture -eq 'x64']
    )
    $result = $null
    $webResponse = Invoke-WebRequest -UseBasicParsing -Uri $downloadPageUrl
    foreach ($link in $webResponse.Links) {
        if ('Href' -in $link.PSobject.Properties.Name) {
            $linkUrl = [Uri]::new([Uri]$downloadPageUrl, $link.Href).AbsoluteUri
            $linkUrlMatch = $linkUrl | Select-String -Pattern $downloadLinkRx
            if ($null -ne $linkUrlMatch) {
                $result = @{PackageVersion = $linkUrlMatch.Matches[0].Groups[1].Value; PackageArchiveUrl = $linkUrl }
                break
            }
        }
    }
    $result
}