How to declare variables in PHP with rules and getting type of variables using gettype() скачать в хорошем качестве

How to declare variables in PHP with rules and getting type of variables using gettype()

04:29 gettype() , getting the type of variable 07:34 undefined variables in PHP Declaring variables in PHP Start with $ Next char after $ ( starting ) must be a letter or underscore ( numbers are not allowed ) Only alphabet, number and underscore are allowed ( no space ) Variable names are case-sensitive Should start with $ $var1=‘testing’; // correct Var1=‘testing’; // wrong _var1=‘testing’; // wrong 5var=‘testing’ // wrong After $ We can’t use number $_var1=‘testing’; // correct $1var=‘testing’; // wrong $var1=‘testing’; // wrong gettype() : Type of the variable Type of Variables in PHP 1. Boolean : True False ( two values only ) 2. Integer : whole numbers like 5 , 356 3. Double : with decimal numbers like 5.6, 2. , 3.89 4. String : "plus2net" 5. Array : Keep multiple variables in an array 6. Object : Used to access classes Example : Database connection object 7. Resource : Holding reference to external resources 8. NULL : Special variable , represents no value Download the source code from here https://www.plus2net.com/php_tutorial... #PHPVariables #variables #PHP #gettype() #undefinedVariables #VariableType #plus2net