PHP program to create a constant using define() function

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<?php
//PHP program to create a constant
//using define() function.

define(PI, 3.14);

$radius = 5;

$area = PI * $radius * $radius;

print ("Area of circle: " . $area);
?>


Output
Area of circle: 78.5

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<?php
//PHP program to create a constant
//using define() fu...

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