Note the implode.  $foo[] should be $foo, but PHP doesn't give an error.  It just gives no output.  I don't
find anything in my php.err log, either.

#!/usr/local/bin/php -q
<?php

$foo = Array( "This", "That", "The other" );

print "Before the implode\n";

print implode( ",", $foo[] );
print "\n";

print "After the implode\n";

?>