PHP BASICS

Hello World Program:

PHP Variables:

There are three types of variables

1. Global
2. Local
3. Static

Global Variable:

Local Variable:

Static Variable:

Data Types:

1. String
2. Integer
3. Float
4. Array
5. Object
6. Null
7. Boolean

String Manipulation functions:

1. Finding the length of the string
2. Count the number of words in a string
3. Reverse of a string
4. Search for a specific text within a string
5. Replace text within a string

Conditional Statements:

1. if
2. if...else
3. if...else ladder
4. switch

Loops:

1. while
2. do... while
3. for
4. foreach

Functions:

Reading data from file line by line:

Writing data to a file and read data from same file:

Reading user input from keyboard and writing on the screen: