PHP查询在MySQL表中插入“ 0”值

Question

My php file inserts into table row 0 values, I cannot find solution for that.

<?php
$selected_button = $_POST['a'];

$conn = mysql_connect('localhost','root','');
if(!$conn )
{
  die('Could not connect: ' . mysql_error());
}
  $sql = "INSERT INTO answers (member_id, question_id, answer) VALUES (1, 2,'$selected_button')";

mysql_select_db('ipad',$conn);
$result = mysql_query($sql, $conn);
if(!$result)
{
    return false;
}
return true;


mysql_close($conn);
?>

after insert i receive, member_id = 0 ; question_id = 0 ; answer = NULL

Answer 1

If you are using mysql, it should be:

$result = mysql_query($sql, $conn);

But try to use mysqli as mysql is deprecated.

Answer 2

There is no query running right now. query is first paramter in mysql_query. $result = mysql_query($sql,$conn);