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PHP

Ganho Kou
Ganho Kou
12,714 Points
Posted by Ganho Kou
Ganho Kou
12,714 Points

I can't understand that result...

Hi, I really can't understand why this echo "321"?? I guess echo "123". But correct answer is "321"...

In "Building a Basic PHP Website"

<?php

$numbers = array(1,2,3,4);

$total = count($numbers);

$sum = 0;

$output = "";

$i = 0;

foreach($numbers as $number) {

$i = $i + 1;

if ($i < $total) {

    $output = $number . $output;

}

}

echo $output;

?>

please help...

1 Answer

Nathan Ward
Nathan Ward
7,907 Points
Nathan Ward
Nathan Ward
7,907 Points

Hi,

The reason that the numbers are returned as '3,2,1' is because of $output is being concatenated to the end each time. So the first time the foreach loop runs it will output

1

The second loop will get the next number and then concatenate the previous number to the end for example:

2,1

And then again with the last number:

3,2,1

To get it to output the numbers in order you would need to do the following:

$output .= $number

I hope that helped you :)