PHP Variables!!
In this article we will discuss about PHP variables.
How To Declare a Variable
In PHP variable is declared with $ sign.
Value can be stored in variable is string, integer, float, Boolean, null etc..
Program :
Output :
Hello khush
5
As we can see in above program we store string in variable x, integer in y and float in z.
After that we simply print it as $x. in PHP when we print variable we must have to use $ with variable.
echo / print
In PHP we can print message with help of print or echo.
The output remain same of both keyword.
Program :
Output :
How are you? // using print
How are you? // using echo
As we can see we use print and echo and output is same
Different Method Of Print Variables.
We can print variable as simple by it's name with $ sign.
We can print with any string, just we have to write variable name where we have to use.
We can implement HTML property in message with variable in a single line.
If we want to give separate property then we can concat with " . '.
Program :
Output :
How are you?
Hello !! How are you?
How are you?
How are you?
As we can see in above program we print variable in different ways.
Also we can print variable with quotation or without quotation.
Let's see an example,
Program :
Output :
Hello!!How are you?
Hello!!How are you?
Operator ' + ' In PHP
In other languages ' + ' is used for concatenation but in PHP for concatenation ' . ' is used.
' + ' operator in PHP is used for operation of only numeric value.
It works as a addition of two numbers.
If we store string instead of number then it generates error "non-numeric value is encountered"
Program :
Output :
7
As we can see here we take two integer values and when we use ' + ' operator, it returns 5 + 2 = 7 in output.
In this article we discuss about different methods for use of variables in brief.
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