PHP is a general-purpose scripting language especially suited to web development. It was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1994.

• Type some thing on the screen

To type on the screen u need to use the echo command

echo("Hello!");

or

echo "Hello!";

• Variables

Variables are containers where we can store pieces of data we want to work with in our programs.

You create a variable by putting $ sign in the beginning.

$characterName = "George";
$characterAge = 70;

Tutorial on Variables - youtu.be/-1iErfiYpBU

• Comments

In computer programming, a comment is a programmer-readable explanation or annotation in the source code of a computer program. They are added with the purpose of making the source code easier for humans to understand, and are generally ignored by compilers and interpreters.

#This is single line comment

/*
This is 
a multiline
comment
*/

• If Statments

In computer science, conditional statements, conditional expressions and conditional constructs are features of a programming language, which perform different computations or actions depending on whether a programmer-specified boolean condition evaluates to true or false.

$ismale = true;

if ($ismale) {
  echo("u are male");
} else {
  echo("u are not male");
}

Tutorial on If Statements- youtu.be/KU8jKqn1-HQ

• Functions

This is a simple function to say hi.

sayHi is the function name, the name of the function could be anything.

function sayHi() {
    echo "Hello";
}

Tutorial on Functions- youtu.be/lBPa92h2AqE