mySQL insert wont update database

Question

I have a form that sends data to the php below. No errors appear but no information is inserted into the database and I don't understand why. I have triple checked all the table names etc and everything is correct. The code echo's out what I put into the form but it doesn't update to the database!

<?php
    //variables for db
    $username = "";
    $password = "";
    $hostname = "localhost"; 
    $dbname = "infinity";

    //connection to the database
    $con = mysql_connect($hostname, $username, $password);

    if($con == FALSE)
    {
        echo 'Cannot connect to database' . mysql_error();
    }

    mysql_select_db($dbname, $con);

    $name=$_POST["name"]; 
    $logo=$_POST["logo"]; 
    $logo="<img src=\"images/".$logo."\" alt=\"$name Logo\" />";
    $blurb=$_POST["blurb"]; 
    $link=$_POST["link"]; 
    echo $name;
    echo $logo;
    echo $blurb;
    echo $link;
    //Insert Values into Database
    mysql_query("INSERT INTO `infinity`.`sponsors` (`name`, `logo`, `blurb`, `link`) VALUES ('$name', '$logo', '$blurb', '$link');");   
?>  

Answer 1

try this

     mysql_query("INSERT INTO `infinity`.`sponsors` (`name`, `logo`, `blurb`, `link`)
 VALUES ('$name', '$logo', '$blurb', '$link')") or die(mysql_error());

else you make check it.

$sql ="INSERT INTO `infinity`.`sponsors` (`name`, `logo`, `blurb`, `link`)
     VALUES ('$name', '$logo', '$blurb', '$link')";
 $sqlinset= mysql_query($sql) or die(mysql_error());
  echo $sql;
  echo $sqlinset;

Answer 2

尝试获取您查询的错误消息：

mysql_query($your_query) OR die(mysql_error());

Answer 3

Try this:

mysql_query("INSERT INTO `infinity`.`sponsors` (`name`, `logo`, `blurb`, `link`) VALUES ('$name', '$logo', '$blurb', '$link');", $con);

And be sure to secure those variables you put in your database from SQL ijection and XSS attacks.