How to comma separate the values of an array for display

Question

I have searched the PHP.net site and originally thought of some use for the list() function but doesn't seem to accomplish the goal:

I have an unknown number of values stored in a single array

$array1 = array(1,2,3,4,5);

or

$array1 = array(1,2,3);

I want to be able to echo (or print_r) the values contained within an array to screen and separated only by commas and spacing.

For example:

the 'idea' is to have echo $array1 to display:

1,2,3

from the second example above.

Answer 1

http://us.php.net/manual/en/function.implode.php

echo implode(", ", $array);

Answer 2

You can simply use PHP's implode function for this purpose as follows:

$string = implode(',', array(1,2,3,4,5));