Roughly a decade ago, PHP killed Perl. Not completely, of course; it still clings on in some environments, it has a sizable legion of die-hard fans, and legacy apps will need to be maintained in it for decades to come. But as a language for newcomers, and especially for web developers, it was already dying in 1999 and was mostly dead by sometime around 2005.
Uh. http://www.indeed.com/jobtrends?q=perl%2C+php%2C+ruby
I think newbies just found easier languages to work with than Perl for web dev, which says nothing about the use or demand for Perl in industry.