PHP Implode返回单个条目

I'm trying to use implode() in a script to return the result of an SQL query as a string so I can insert it into another table, however whenever I manage to get the implode to return anything it will only return a single result, even though the query returns more than one result.

Note: my PHP is not the strongest and I am using pre-existing code and reworking it, which is why a lot of the code will look like it's meant for a JSON API.

$rows = $stmt->fetchAll();


 if ($rows) {
     $response["success"] = 1;
     $response["message"] = "Events Scheduled!";
     $response["events"]   = array();

 foreach ($rows as $row) {
     $post             = array();
$post["id"]  = $row["id"];
     $post["message"] = $row["message"];
     $post["pin"] = $row["pin"];

     array_push($response["events"], $post);
     $matstring=implode("', '",$post);
    }
}

When echo'd out I get:

3', 'Test to check multiple entries are in array for when the check is made, this should be seen.', '12345

imploding $response['events'] returns "Array, Array" and everything else I have tried returns nothing. Where should I look to get the other entry?

I think what are you want is like this:

$str = "'".implode(",'", $post)."'";
echo $str;