Learning PHP - Variables

Variables in PHP

- storage for values or expressions
- starts with $     ( ex: $sample1)
- variable name must begin with a letter or underscore  ( $student  or   $_student )
- no spaces   ( error: $stu dent,  should be: $student )   
- case sensitive ( $student is not the same with $Student )
- assignment operator is =  ( $student=1 ; assigns value number 1 to the variable )
- use quotes " " to assign text value  ( $student="Bram" )
- the value may change during program execution