programmingtutorials

  Consider the following example : < ?php $abc = 'Welcome' ; echo "Value of abc : $abc" ; echo "Value of ABC : $ABC" ; ? > As previously mentioned you don't need to declare variables or their type before using them in PHP. In the following example, none of the variables are declared before they are used, the fact is $height is floating number and $width is an integer.  < ?php $height = 3.5 ; $width = 4 ; $area = $height * $width ; echo "Area of the rectangle is : $area" ; ? >