Function definition with returning some value - PHP

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PHP Code

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<?php 

       // function definition with returning some value 

function sum($a,$b)  

{    

 $sum = $a + $b; 

 return $sum; 

} 

function minus($a,$b) 

{   

$minus = $a - $b; 

return $minus; 

} 

// function definition with returning some value 

// use of return function as a variable 

echo "Sum of 2 and 3 is : ".sum(2,3); 

// use of return function as a variable 

// function definition with returning some value 

?>

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Output of the Code

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Sum of 2 and 3 is : 5