The way to store information in php program by using a varible
*All variable is preceeded by $ sign.
* Values are assigned with = operator.
*Composed of letters(lower case and upper case), digits(0 to 9) and under score charecters.
first charecters after $ may not be a number.
Types of variables
1. Interger - a whole number without a decimal point
2. Double - Floating point like 3.141
3. Boolean two possible values
4. Null special type has one values NULL.
5. String - sequence of charecter
6. Array - collection of elements
7. Objects - Instance of classes
8. Resources - special variables that hold reference external to PHP
*All variable is preceeded by $ sign.
* Values are assigned with = operator.
*Composed of letters(lower case and upper case), digits(0 to 9) and under score charecters.
first charecters after $ may not be a number.
Types of variables
1. Interger - a whole number without a decimal point
2. Double - Floating point like 3.141
3. Boolean two possible values
4. Null special type has one values NULL.
5. String - sequence of charecter
6. Array - collection of elements
7. Objects - Instance of classes
8. Resources - special variables that hold reference external to PHP
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