Data Types

integer

• A whole Number 
• Example: 1,2,3…..100 
• Example in php $a=68

Float/double

• A number with a decimal (or floating number)
• Example: 2.35, 5.4, 345.6
• Example in php: $number1=6.8

String

• This data type is a string of characters
• Can be either letters or puncuations  
• Example Hi! 
• Example in php: $name="Rachel?"

Boolean

• This is a true or false request 
• Example in php: $test= True, $test=False

Array

• An array is an ordered map
• Consists of names or values that are mapped in values
• Example in php:$cars=array("Volvo","BMW","Toyota")

Object

• A data type that contains properties and methods
• Information on how to process data 

Null

• This is when a variable does not contain a value 
• Example in php: $x=null

Loose Typing

• In php we define our type of variables simply by choosing 
• the list just given to you. 
• In C programming you have to define the variable 
• Example in C programming: int number1; 
• or char lastname[30]; 

Gettype function

• If ever concerned with what data type you made a variable use gettype  
• Example: echo gettype($value)
• This will then display to you what data type $value is

Changing a VARIABLE

• settype() function will change a variable that you have already set
• Example in php: 
• $a=4.657
• settype($a."integer") 
• Result = if you were to type echo $a       4 would appear 

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