Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

PHP PHP Functions PHP Internal Functions PHP Array Functions

Georgina Pacey
Georgina Pacey
4,139 Points
Posted by Georgina Pacey
Georgina Pacey
4,139 Points

Preview is blank. array_walk

I am sure it's something obvious, but why does the preview come up blank?

<?php

$names = array(
  'Mike' => 'Frog',
  'Chris' => 'Teacher',
  'Hampton' => 'Teacher'
);

function print_info($value, $key){
  echo "$key is a $value.</br>";  
}

array_walk($names, 'print info');

1 Answer

thomascawthorn
thomascawthorn
22,986 Points
thomascawthorn
thomascawthorn
22,986 Points

Hmm, it looks like your function name is 'print_info', but you've called 'print info'.

Try adding an underscore like this:

<?php

array_walk($names, 'print_info');