错误：“数组到字符串转换” - 内爆函数

The Script:

<?php

if(isset($_POST['submit'])) {

    $some_text_1 = $_POST['some_text_1'];
    $some_text_2 = $_POST['some_text_2'];
    $some_text_3 = $_POST['some_text_3'];

    $myarray = array($some_text_1, $some_text_2, $some_text_3);

    for ($i = 0; $i < count($myarray); $i++) {

        $tqs = "INSERT INTO `table` (`some_text`) VALUES ('" . $myarray[$i] . "')";
        $tqr = mysqli_query($dbc, $tqs) or die(mysqli_error($dbc));


        $tqs = "SELECT `id` FROM `table`  WHERE `some_text` = '" . $myarray[$i] . "'";
        $tqr = mysqli_query($dbc, $tqs) or die(mysqli_error($dbc));
        $fetch_array[] = mysqli_fetch_array($tqr);

    }

    $fetch_array = implode(", ", $fetch_array);

?>

I am looking to insert the array into a row of a column like in this following example:

the_row: | 3, 4, 5, 6, 7

Though when using the implode function I am getting this error:

Notice: Array to string conversion in ... (points to the implode function)

Any suggestions on how to get this working?

implode() requires an array of strings as the second parameter. You are giving it an array of arrays.

You could use something like this to solve that (just an example):

$row = mysqli_fetch_array($tqr);
$fetch_array[] = row['id'];