PHP create an array from the values of another arrays key?

Programmer Question

PHP create an array ($arr2) from the values of another arrays ($arr1) key (name)?

I have an array as follows:

$arr1 = array(0 => array('name' => 'tom', 'age' => 22), 1 => array('name' => 'nick', 'age' => 18));

However I want to create an array from it which consists of all the names, so it would become:

$arr2 = array('tom', 'nick');

I've looked at array_filter(), but that would'nt work as this is a multi-dimensional array?

All help is appreciated :)

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