I can't separate the array by commas

Question

I have a problem I cannot separate the array by commas if I put the implode it only shows the first number and not the second in database i need insert in database 500,756

global $wpdb;  $arg=array(500,756);

$var = implode(",", $arg);   --> return in db 500 ->I can not separate by commas, num 500 is only show in db 
$var = implode($arg);        --> if i put this instead of the other return in db shows 500756

     $wpdb->insert('number',array( 
          'num' => $var,   
        ));  

CREATE TABLE `number` (
  `id` int(255) NOT NULL,
  `num` varchar(255) NOT NULL,
) ENGINE=MyISAM DEFAULT CHARSET=latin1;


ALTER TABLE `number`
  ADD PRIMARY KEY (`id`);

ALTER TABLE `number`
  MODIFY `id` int(255) NOT NULL AUTO_INCREMENT, AUTO_INCREMENT=39;

Answer 1

implode(",", [500,756]) will definitely return "500,756", therefore you have some other problem.

If the field type of the 'num' field is a numeric type such as MySQL's INT, then MySQL or PHP might try and convert this string to a number and so "500,756" could become 500.

Check the data type of the 'num' field in the 'number' table. To store the string you want to store it needs to be a string type such as VARCHAR. Or if you're trying to store a number with stuff after the decimal point make sure it's e.g. a FLOAT / DECIMAL, etc. and add the value using a decimal point, e.g. 500.756.

If you need further help, show the CREATE TABLE output for your table