Question

I have a string

$str = '1,2,3,4,5,"6,000",7,8,9';

How can I clean it up to:

'1,2,3,4,5,6000,7,8,9'

Answer 1

Try something like this (for PHP < 5.3):

$dst = array();
$str = '1,2,3,4,5,"6,000",7,8,9';

$state = false;
$buffer = '';
for ($i = 0, $lim = strlen($str); $i < $lim; $i += 1) {
  $char = $str[$i];

  switch ($char) {
    case ',':
      if (!$state) {
        $dst[] = $buffer;
        $buffer = '';
      }
      break;

    case '"':
      $state = !$state;
      break;

    default:
      $buffer .= $char;
  }
}

$dst[] = $buffer;

print_r($dst);