Embperl perhaps, though for small to middle sized sites, HTML::Template is preferable.

I'm not really looking to favour any particular approach to Perl web development; rather to cover the major function groups within PHP:

Apache-specific | Array | Bzip2 | Calendar | Class/object | CURL | Character-Type | Date & Time | DOM XML | Error Handling & Logging | Filesystem | FTP | Function Handling | Gettext | HTTP | iconv | Image | IMAP,POP3,NNTP | Mail | Mathematical | Mcrypt | Mhash | Mimetype | Miscellaneous | Multibyte String | MySQL (< 4.1) | Improved MySQL (>= 4.1) | Network | OpenSSL | Output Control | Object Overloading | PDF | PostgreSQL | Pspell | Session Handling | SimpleXML | Standard PHP Library (PHP5) | SOAP | Stream | String | TCP Wrappers | Tidy | URL | Variable | XML Parser | XML-RPC | XSL | XSLT | Zlib