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PHP PHP Functions Function Returns and More PHP Variable Functions

Luis Alveiro Martinez Botello
Luis Alveiro Martinez Botello
2,726 Points
Posted by Luis Alveiro Martinez Botello
Luis Alveiro Martinez Botello
2,726 Points

I am running my code but does not show me anything?

<?php

function answer(){ return 42; }

function add_up($a, $b);{ return $a + $b; }

$func = 'add_up';

$num = $func(5, 10);

echo $num();

?>

2 Answers

Marcus Parsons
Marcus Parsons
15,719 Points

Hi Luis,

There are just a couple errors in your code. The first one is that you have a semicolon right after the ending parenthesis for your add_up function. Remember that you only need a semicolon after commands.

The other error is that you have $num(); as though it were a function but $num is actually just an integer value because the add_up function returns its result into the $num variable. So, all you need is the variable $num with no parenthesis. With these fixed, your code shows up! :)

<?php

function answer(){ return 42; }

//removed ; after the ) 
function add_up($a, $b) { return $a + $b; }

$func = 'add_up';

$num = $func(5, 10);

//removed () from $num
echo $num;

?>
Marcus Parsons
Marcus Parsons
15,719 Points

Excellent! Happy Coding! =]