PHP Variables

Variables are the names used to store data in programming language. The values stored in a variable may be changed during the execution of the program. The php variable names are starting with a dollar ( $ ) symbol. The variable declaration is not required in php. The php variables donot have a type declaration. The data type of the php variable are automatically determined according to the usage.

Example for legal variable names

• $variable
• $Count
• $_QESTION
• $Y13
• $one_hrs
• $$a

Examples of invalid variable names

• $1024
• $*abc
• $xy-z
• $1hrs

Variable names in php are case-sensitive. That is $name is diiferent from both $NAME and $Name.