Check this out: “Why should I bother?”.
All organizations have an “Official Technology List”. I work “Enterprise IT”, where the official languages are limited to Java, VB .Net, C, C++. After that... well... it may as well be Esperanto or Whitespace.
PHP, for example, is near the top of the TIOBE index, but often shunned as “not enterprise ready”.
I’m using Python and folks have things to say: mostly tongue-clucking and eye-rolling. So far, however, it’s working because things are so easy to develop, test and change.