Question

The code below shows one email address as a output but I want to get a list of all
email addresses (seperated by comma) of customer table. How can I get that?

<?php

    $SQLstring = "SELECT email FROM customers";
    $QueryResult = @mysqli_query($DBConnect, $SQLstring)
                   or die("<p>Unable to execute the query.</p>" .
                          "<p> Error code " . mysqli_errno($DBConnect) . ":" . mysqli_error                 ($DBConnect))."</p>";

    $NumRows = mysqli_num_rows($QueryResult);
    if ($NumRows == 0)
    {
        echo "<p>No email found.</p>";
    }

    else
    {
        for($i = 1; $i <= $NumRows; $i++)

        {
            $Row = mysqli_fetch_row($QueryResult);
            $email = stripslashes($Row[0]);
            echo $email;
        }
    }

?>

Answer 1

This is mysqli not mysql you’re using so things work a little differently…

Assuming you’ve created your mysqli connection with something like $DBConnect = new msqli( ... );

It’s probably better to store the result before you manipulate it; try something like:

$success = $DBConnect->real_query($SQLstring);
if($success) {
  $result = $DBConnect->store_result();
  while($row = $result->fetch_array(MYSQLI_ASSOC)) {
    echo $row['email'] . "<br />\n"; //for debugging purposes
  }
}

$result->free();