Question

here am trying to add a comma in the values got by the foreach loop. now the values are coming all together, but i want it to get echoed as comma separated. please suggest me what i gotta do . I know, i gotta use implode, but i don’t know how to do it exactly in a loop.

foreach($_POST['insert'] as $interested) {
    if(!preg_match('/^[-A-Z0-9\., ]+$/iD', $interested)) continue; 
        echo $interested;

    }

Answer 1

If you want to leave your code relatively untouched (though I fixed your confusing indentation)…

$interestedValues = array();

foreach($_POST['insert'] as $interested) {
    if(!preg_match('/^[-A-Z0-9\., ]+$/iD', $interested)) continue; 

    $interestedValues[] = $interested;

}

echo implode(',', $interestedValues);

…Or as one liners seem fashionable…

echo implode(',', preg_grep('/^[-A-Z\d., ]+$/iD', $_POST['insert']));