MySQL fetch query PHP


There are only 30 values in the table butmysqli_num_rows($result) return 60 Same query is being executed twice , here is the code :


if (mysqli_connect_errno()) {
    # code...
    echo "Could not connect to MYSQL database".mysqli_connect_error();

$sql = "select * from ticket_staff";
$result = mysqli_query($con, $sql);
echo mysqli_num_rows($result);
if (mysqli_num_rows($result) > 0) {
    // output data of each row
    while($row = mysqli_fetch_assoc($result)) {
        echo   $row["t_ID"]."<br>";
} else {
    echo "0 results";


here is the screenshot of output

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