Source Code : Calling Variable Functions

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Calling Variable Functions

 
<?php 
function addvalues ($firstvalue = 0, $secondvalue = 0){ 
    return $firstvalue + $secondvalue; 
} 
function subtractvalues ($firstvalue = 0, $secondvalue = 0){ 
    return $firstvalue - $secondvalue; 
} 
function multiplyvalues ($firstvalue = 0, $secondvalue = 0){ 
    return $firstvalue * $secondvalue; 
} 
$firstvalue = 10; 
$secondvalue = 3; 
$whattodo = "addvalues"; 

echo $whattodo($firstvalue, $secondvalue) . "<br />"; 

$whattodo = "subtractvalues"; 
echo $whattodo($firstvalue, $secondvalue) . "<br />"; 
?>
  
  

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