Problema: array e database!

[andbaz]

RISOLTO, GRAZIE

$text = $_POST['post'];
$text = preg_replace('/#([\w]+)/', '[url="http://127.0.0.1:8887/tag.php?q=$1"]#$1[/url]', $text);            
$cerca = preg_match_all('/#([\w]+)/', $text, $tag);
print_r($tag[1]);
$tag = implode($tag[1]);