Powershell script to get Audit log settings for all site collections.

Hi all,

I am facing issue to get audit log details for all site collection across the farm with the below script. Could someone help me change the script.

Function AuditValue($url)

  {
  	$site=Get-SPSite $url
		auditMask = $site.audit.auditflag
		return auditMask

  }

Get-SPSite -Limit All | Get-SPWeb -Limit All |
Select 	Title,Url,AuditValue(Url)| export-csv "D:\scripts\Test\AuditDetails.csv" -notypeinformagettion

Thanks Basva