PHP is sometimes (earlier) called "Personal Home Page" or sometimes "PHP: Hypertext Preprocessor".
As you can see in the later form 'PHP' word is included in full form itself, hence it's sometimes called recursive acronym. But it is said that in the second full form. PHP -> "PHP: Hypertext Preprocessor", PHP stands for the "Personal Home Page" thus making it logical. :)
php stands for hypertext preprocessor. previously it was called as personal home page(in past). php is an open-source scripting language. we also can used it for shell scripting. it is very easy to learn and powerfull language .