Mysql query is not inserting values

Question

I tryed to insert into my db some values from post values and its not working.. Tried just 1 value from 1 post and it works, not working with multiple posts. No errors, nothing :(

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code:

$rowSQL = mysql_query( "SELECT MAX( id ) AS max FROM `topic`;" );
$row = mysql_fetch_array( $rowSQL );
$largestNumber = $row['max'];

$new_id = ++$largestNumber;

$newnumber = mysql_query("INSERT INTO topic SET id = '".$new_id."'");

if (isset($_POST['submit']) && strlen($_POST['nome'])!== 0 && strlen($_POST['desc'])!== 0 && strlen($_POST['link'])!== 0){

    $nome = mysql_real_escape_string($_POST['nome']);
    $desc = mysql_real_escape_string($_POST['desc']);
    $link = mysql_real_escape_string($_POST['link']);
    $insert = ("INSERT INTO topic SET nome = '".$nome."', `desc` = '".$desc."', `link` = '".$link."' WHERE id = '".$newnumber."'") or die(mysql_error());
    $run = mysql_query($insert);
    if($run) { echo '<span style="color:#AFA;text-align:center;margin:8px;">Sucesso!</span>'; } else { echo '<span style="color:#DC143C;text-align:center;margin:8px;">Ocorreu um erro.Tenta novamente.</span>'; }
}else{
    echo "Campos não foram preenchidos.";
}

Answer 1

Try this and post what you're getting:

$rowSQL = mysql_query( "SELECT MAX( id ) AS max FROM `topic`;" );
$row = mysql_fetch_array( $rowSQL );
$largestNumber = $row['max'];

$new_id = ++$largestNumber;

$newnumber = mysql_query("INSERT INTO topic SET id = '".$new_id."'");

if (isset($_POST['submit']) && strlen($_POST['nome'])!== 0 && strlen($_POST['desc'])!== 0 && strlen($_POST['link'])!== 0){

    $nome = mysql_real_escape_string($_POST['nome']);
    $desc = mysql_real_escape_string($_POST['desc']);
    $link = mysql_real_escape_string($_POST['link']);
    $insert = "INSERT INTO topic SET nome = '".$nome."', `desc` = '".$desc."', `link` = '".$link."' WHERE id = '".$newnumber."'";
    echo $insert;
    $run = mysql_query($insert) or die(mysql_error());
    if($run) { echo '<span style="color:#AFA;text-align:center;margin:8px;">Sucesso!</span>'; } else { echo '<span style="color:#DC143C;text-align:center;margin:8px;">Ocorreu um erro.Tenta novamente.</span>'; }
}else{
    echo "Campos não foram preenchidos.";
}

Edit:

If you want to insert some data then why did you put where clause there?

Edit2:

$update = "UPDATE topic SET nome = '".$nome."', `desc` = '".$desc."', `link` = '".$link."' WHERE id = '".$newnumber."'";

$run = mysql_query($update) or die(mysql_error());

Edit3:

$rowSQL = mysql_query( "SELECT MAX( id ) AS max FROM `topic`;" );
$row = mysql_fetch_array( $rowSQL );
$largestNumber = $row['max'];

$new_id = ++$largestNumber;

if (isset($_POST['submit']) && strlen($_POST['nome'])!== 0 && strlen($_POST['desc'])!== 0 && strlen($_POST['link'])!== 0){

    $nome = mysql_real_escape_string($_POST['nome']);
    $desc = mysql_real_escape_string($_POST['desc']);
    $link = mysql_real_escape_string($_POST['link']);
    mysql_query("INSERT INTO topic SET id = '".$new_id."', nome = '".$nome."', `desc` = '".$desc."', `link` = '".$link."'") or die(mysql_error());
    if($run) { echo '<span style="color:#AFA;text-align:center;margin:8px;">Sucesso!</span>'; } else { echo '<span style="color:#DC143C;text-align:center;margin:8px;">Ocorreu um erro.Tenta novamente.</span>'; }
}else{
    echo "Campos não foram preenchidos.";
}

Answer 2

It looks like you're writing code to increment the ID of the row in the database, when you could let MySQL handle this itself. If you set the AUTO INCREMENT true on the id field then all you should need is the following;

// Validate your POST inputs
if (isset($_POST['submit']) && strlen($_POST['nome'])!== 0 && strlen($_POST['desc'])!== 0 && strlen($_POST['link'])!== 0){

$nome = mysql_real_escape_string($_POST['nome']);
$desc = mysql_real_escape_string($_POST['desc']);
$link = mysql_real_escape_string($_POST['link']);

$insert = "INSERT INTO topic (nome, desc, link) VALUES ('".$nome."', '".$desc."', '".$link."')";
echo $insert;
$run = mysql_query($insert) or die(mysql_error());
if($run) { echo '<span style="color:#AFA;text-align:center;margin:8px;">Sucesso!</span>'; } else { echo '<span style="color:#DC143C;text-align:center;margin:8px;">Ocorreu um erro.Tenta novamente.</span>'; }
}else{
echo "Campos não foram preenchidos.";
}

If you set the id field to AUTO INCREMENT then the id will automatically set itself to the next number in the list

Answer 3

Try this one:

$rowSQL = mysql_query( "SELECT MAX( id ) AS max FROM `topic`;" );
$row = mysql_fetch_array( $rowSQL );
$largestNumber = $row['max'];

$new_id = ++$largestNumber;

$newnumber = mysql_query("INSERT INTO topic SET id = '".$new_id."'");
$newnumberid = mysql_query("SELECT id FROM topic WHERE id = '".$new_id."'");

if (isset($_POST['submit']) && strlen($_POST['nome'])!== 0 && strlen($_POST['desc'])!== 0 && strlen($_POST['link'])!== 0){

$nome = mysql_real_escape_string($_POST['nome']);
$desc = mysql_real_escape_string($_POST['desc']);
$link = mysql_real_escape_string($_POST['link']);
$insert = "UPDATE topic(nome,desc,link) SET nome = '".$nome."', `desc` = '".$desc."', `link` = '".$link."' WHERE id = '".$newnumberid."'";
echo $insert;
$run = mysql_query($insert) or die(mysql_error());
if($run) { echo '<span style="color:#AFA;text-align:center;margin:8px;">Sucesso!</span>'; } else { echo '<span style="color:#DC143C;text-align:center;margin:8px;">Ocorreu um erro.Tenta novamente.</span>'; }
}else{
echo "Campos não foram preenchidos.";
}