PHP, a programing language popular for web and backend development, was once one of the most popular languages. Still, it's showing signs of dropping down the rankings, according to software-testing firm Tiobe.
"PHP was once the master of web programming, but now it is facing a lot of competition in this field. This is not to say that PHP is dead. There are still a lot of small and medium enterprises relying on PHP. So I expect PHP to decline further but in a very slow pace," notes Tiobe CEO Paul Jansen.
Tiobe bases its rankings on queries made on several search engines about programming languages. It's one of several sources that developers can use to track what languages are worth investing time into learning.
The remainder of the top 20 includes Classic Visual Basic, Groovy, Ruby, Swift, R, Perl, Delphi, Go, Fortran, and MATLAB.