a doubt regarding PHP function

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This code shows a blank screen

PHP

<?php

function add($first, $second)
{

global $result ;
$result = $first + $second ;

}


echo add(4,5) ;


?>

but this code shows the output as 9

PHP

<?php

function add($first, $second)
{

global $result ;
$result = $first + $second ;

}


add(4,5) ;
echo $result ;


?>

What is the reason for this difference?

Posted 1-Nov-13 0:34am

Comments

Maarten Kools 1-Nov-13 7:28am

add() does not return a result, so echo add() won't output anything.

CPallini 4-Nov-13 16:06pm

My (virtual) 5.

IAM_Dhruv 1-Nov-13 8:13am

ok. thanks. Had this confusion. Its clear now.

1 solution

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W∴ Balboos, *GHB* · Answer 1 · 2013-11-04T06:42:00

What is your function sending back with it's return statement?

Nothing - since you don't have one.

Add something like

return $result;

to the end and echo'ing the function will echo the return value;

Posted 4-Nov-13 6:42am

Comments

CPallini 4-Nov-13 16:06pm

My 5.