ASP to PHP conversion

[jimg_comp]

Hi everyone. I'm new to PHP and trying to wrap my arms around it. I have been coding with ASP for a while and the best way for my personal learning style is to take and example I'm familiar with and see a conversion so I can get a good understanding of what the code is doing.

I have this ASP code that checks the referring URL. If its from a specific URL, I generate certain HTML. If not, I generate different HTML. Can someone help me translate this to PHP?

Code:
<%
const ValidReferers = "somedomain.com, somedomain"
Function CheckReferer()
dim arURLs, tmpCount, boolValidURL
dim strURL, nIndex
arURLs = Split(ValidReferers, ", ")
boolValidURL = False
strURL = Request.ServerVariables("HTTP_REFERER")
Response.Write strURL & "<br>"
If LCase(Left(strURL,11)) = "http://www." Then strURL = Mid(strURL,12)
If LCase(Left(strURL,12)) = "https://www." Then strURL = Mid(strURL,13)
nIndex = InStr( strURL, "/")
If nIndex > 0 Then strURL = Left(strURL,nIndex-1)
For tmpCount = 0 To UBound(arURLs)
If strURL = arURLs(tmpCount) Then boolValidURL = True
Next
CheckReferer = boolValidURL
End Function

If CheckReferer Then
'the URL is ok - do rest of processing
Response.Write strURL & " is good <br>"
%>
Do HTML Stuff here
<%
Else
'referring url is bad. Spit out an error message
Response.Write strURL & " is bad"
%>
Do HTML stuff here
<%
End If
%>

Thanks in advance!

[Mordecai]

Well, here's what looks like a good port. Test it out and see if the results are the same. Note that I typed this without testing it or checking for syntax, but it looks right. If not, refer to the manual or post back.

<?php
$ValidReferers = array('somedomain.com','somedomain');
function CheckReferer() {
  $strURL = $_SERVER['HTTP_REFERER'];
  echo $strURL . '<br>';
  if (strtolower(substr($strURL,0,11)) == 'http://www.') $strURL = substr($strURL,12);
  if (strtolower(substr($strURL,0,12)) == 'https://www.') $strURL = substr($strURL,13);
  $nIndex = substr_count($strURL, '/');
  if ($nIndex > 0) $strURL = substr($strURL,0,$nIndex-1);
  for ($tmpCount=0;$tmpCount<count($ValidReferers);$tmpCount++) {
    if ($strURL = $ValidReferers[$tmpCount]) $boolValidURL = TRUE;
  }
  return $boolValidURL;
}

if (CheckReferer() == TRUE) {
  //the URL is ok - do rest of processing
  echo $strURL . ' is good <br>';
}
?>
Do HTML Stuff here
<?php
else {
  //referring url is bad. Spit out an error message
  echo $strURL . ' is bad';
?>
Do HTML stuff here
<?php
}
?>

HTH

[jimg_comp]

You rock man! Thanks!

I'm getting this error:

Parse error: parse error, unexpected T_ELSE

but I can figure it out from here.

Thanks again!