PHP/SQL error in sql query

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I am self learning php/Mysql. I wrote the following code

$con=mysqli_connect("localhost","mangala","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

$sql="INSERT INTO groups(Desc) VALUES('$_POST[desc]')";

if (!mysqli_query($con,$sql))
{
die('Error: ' . mysqli_error($con));
}
echo "1 record added";

mysqli_close($con);
?>

When I call this php file in HTML, shows following error

Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Desc) VALUES('Desktop')' at line 1

anyone can help me?

Posted 6-Dec-13 18:34pm

Withanam

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skydger · Answer 1 · 2013-12-07T07:54:00

It seems that it is an issue with reserved words in MySQL engine. You should use double quotes or backtick/backquotes with these words. For example:

SQL

$sql="INSERT INTO groups(`Desc`) VALUES('$_POST[desc]')";

Please refer to MySQL 5.7 Reference Manual 9.3 Reserved Words[^] for more details.
Also consider to use parameters instead of using a $_POST or $_GET variables. For example:

PHP

$statement = $db->prepare("INSERT INTO groups(`Desc`) VALUES(:desc_column)");
$statement->execute(array('desc_column' => $_POST[desc]));