PHP doesn't insert into mysql - php

Question

I'am trying to do very simple php page and have some kind of problem here. the page works and everything but there is nothing coming to mysql. When I press submit it prints insert into DrinkHistory(CustomerId,DrinkId,SellerId) values('1','3','2')Your Data Inserted. But when I login to phpmyadmin there is nothing in DrinkHistory table.
the code is below
<?php
// Create connection
$con=mysqli_connect("localhost","******","*******","test");
// Check connection
if (mysqli_connect_errno($con))
{
echo "Mene kotii ku et mitää osaa: " . mysqli_connect_error();
}
// Insert Data
#$a=$_POST['CustomerId'];
#$b=$_POST['DrinkId'];
#$c=$_POST['SellerId'];
if(#$_POST['submit'])
{
echo $s="insert into DrinkHistory(CustomerId,DrinkId,SellerId) values('$a','$b','$c')";
echo "Your Data Inserted";
mysql_query($s);
}
?>
<center>
<form method="post">
<table width="100%" height="245" border="1" bgcolor="#00CCFF">
<tr><td width="112" height="26">Asiakas</td>
<td width="100"><input type="radio" name="CustomerId" value="1"/>Jokirinne Niko</td>
</tr>
<tr><td rowspan="2">Juoma</td>
<form method)="post">
<td height="28"><input type="radio" name="DrinkId" value="2"/>Kalja</td>
<td height="28"><input type="radio" name="DrinkId" value="3"/>Lonkero</td>
<td height="28"><input type="radio" name="DrinkId" value="4"/>Siideri</td>
<td height="28"><input type="radio" name="DrinkId" value="5"/>Fisu</td>
<td height="28"><input type="radio" name="DrinkId" value="6"/>Tequila</td>
<td height="26"><input type="radio" name="DrinkId" value="7"/>MustikkaShotti</td>
</tr>
<td height="33"></tr>
<tr><td rowspan="3">Myyjä</td>
<td><input type="radio" name="SellerId" value="1"/>Niko Jokirinne</td>
<tr>
<td><input type="radio" name="SellerId" value="2"/>Tanya Lickorish</td>
<tr>
<tr><td height="62"><input type="submit" name="submit" value="Juo"/></td></tr>
</table>
</form>
</center>
</body>
</html>

Answer 1

You seem to be omitting the connection string (using mysql_query instead of mysqli_query) and error verification. Try this:
<?php
// Create connection
$con=mysqli_connect("localhost","******","*******","test");
// Check connection
if (mysqli_connect_errno($con))
{
echo "Mene kotii ku et mitää osaa: " . mysqli_connect_error();
}
// Insert Data
#$a=$_POST['CustomerId'];
#$b=$_POST['DrinkId'];
#$c=$_POST['SellerId'];
if(#$_POST['submit']) {
echo $s = "insert into DrinkHistory(CustomerId,DrinkId,SellerId) values('$a','$b','$c')";
if (mysqli_query($con, $s)) {
echo "Your Data Inserted";
} else {
echo "Error inserting data: ".mysqli_error();
}
}
?>

Answer 2

You have several database libraries to choose from but, once you decide, you need to stick to one. You cannot start a connection with the new mysqli extension:
$con=mysqli_connect("localhost","******","*******","test");
... and then try to query the database with the legacy deprecated functions:
mysql_query($s);
If you are not getting a blattant error message on screen you've probably failed to configure PHP to display error messages in your development box.That's something you need to fix before you go further; it's impossible to code without the aid of error messages. Here's a brief explanation.
Finally, you verify if your connection fails:
if (mysqli_connect_errno($con))
... but you don't test if your query fails.