3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php /*Variables: (1)Php has 8 types of variables which include: - Boolean (true/false) - integers - floating integers - strings - arrays - objects - resources - null (2)variables must start with $ sign (3)Variable names can contain a combination of strings, numbers and underscores (4)The first character in the name of a variable must be either a letter or underscore (5)Php variable names are case sensitive (6)Variables can be assigned with equal signs and printed without quotation marks Eg, print $some_variable; , or echo $some_variable; (7)Variables can also be printed with double quotations but cannot with single quotes echo 'Defining a variable:' ,*/ $variable_name = 'this is a string representation of a variable'; echo $variable_name; echo 'this is a integer representation of a variable'; $variable_name = 30; ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
this is a string representation of a variablethis is a integer representation of a variable