If you commit to studying part-time, learning PHP in three to six months is a reasonable goal. But, if you decide to commit all your time to learning PHP, you should be able to learn the basics within a month or two. As with any programming language , learning PHP is a journey.
In general, PHP is regarded as an easy programming language to master for people just starting to learn to program. As with any programming language, PHP has rules of coding, abbreviations, and algorithms. Learning PHP will be easy or challenging depending on how you approach learning the language itself.