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PHP

Posted by Morrice Pfeiffer
Morrice Pfeiffer
4,162 Points

Quiz question

This has me puzzled.

Can someone walk me through this?

                <?php

                  $flavors = array("Cake Batter","Cookie Dough");

                     foreach ($flavors as $a => $b) {

                     echo $a;

                     }

Answer is 01 but where that comes from I don't get.

M

?>

3 Answers

Matthew Mascioni
Matthew Mascioni
20,444 Points

Hi Morrice!

If I'm correct, calling your 'foreach' loop like that is outputting the keys for the items in the $flavors array. Keys in arrays identify the strings associated with them. Each item has its own key, starting with 0- so "Cake Batter" has a key of 0, and "Cookie Dough" has a key of 1. By echoing the $a value, you're echoing the key of the array items. (where, in your foreach loop, $a is the key of the array item and $b is the string associated with that key) Since there are only two keys in that array, 0 and 1; they will both be echoed out. If your foreach loop looked like this:

<?php
$flavors = array("Cake Batter","Cookie Dough");

foreach ($flavors as $a => $b) {
    echo $b;
}
?>

Then your output would be Cake BatterCookieDough.

Hope this helps!

Michelle Hurwitz
Michelle Hurwitz
11,854 Points

The correct answer is for echo $b would actually be "Cake Batter." I didn't get it either, had to go through all options before I understood it wants the string of the FIRST array item only.

<?php $flavors = array("Cake Batter","Cookie Dough"); foreach ($flavors as $a => $b) { echo $b; exit; } ?>

legarejp
legarejp
852 Points
legarejp
legarejp
852 Points

$flavors = array("Cake Batter","Cookie Dough") creates an array with a default key 0 that auto increment itself.

echo $a display the key, so 0 for "Cake Batter" and 1 for "Cookie Dough".

Morrice Pfeiffer
Morrice Pfeiffer
4,162 Points
Morrice Pfeiffer
Morrice Pfeiffer
4,162 Points

Thanks guys

You put me on the right path