PHP Default Argument Value

The following example demonstrates how to use a default parameter. If we call the function setHeight() without any arguments, it will use the default value as the argument

Example

function setHeight($minheight = 50) {

  echo "The height is : $minheight <br>";

}

setHeight(350);

setHeight(); // will use the default value of 50

setHeight(135);
setHeight(80);