Answers for "php implode array with keys"

php implode as key value of object

$output = implode(', ', array_map(
    function ($v, $k) { return sprintf("%s='%s'", $k, $v); },
    $input,
    array_keys($input)
));

php implode array

$values = array_map('array_pop', $array);
$imploded = implode(',', $values);

php implode keys

$cols = implode(', ',array_keys($values));