php/sql returning empty set

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<html>
<head>
</head>
<body>
<form action = "insertform.php" method = "post">
field: <input type = "text" name = "fielda">
field2: <input type = "text" name = "fieldb">
thedata: <input type = "text" name = "qdata">
<input type = "submit" name = "submit">
</form>

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

$con = mysql_connect("localhost","user","password");
if (!$con){
die("cannot connect" . mysql_error());
}
mysql_select_db("stQutieria",$con);
$sql = "INSERT INTO qtable(fielda, fieldb, qdata) VALUES ("$_POST[fielda]","$_POST[fieldb]","$_POST[qdata]")";

mysql_query($sql,$con);
mysql_close($con);
}
?>
</body>
</html>

Am trying to assign values in my qtable table in database in MySQL.

Posted 6-Feb-14 15:10pm

Member 10577686

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Peter Leow · Answer 1 · 2014-02-06T16:05:00

You have to quote your string values:

$sql = "INSERT INTO qtable(fielda, fieldb, qdata) VALUES ('".$_POST['fielda']."','".$_POST['fieldb']."','".$_POST['qdata']."')";

However, you should not create SQL statements by assembling variables. It is opened to SQL Injection. You should change it to use prepared statements and parameterized queries. See example: how-can-i-prevent-sql-injection-in-php[^]