使用php连接到mysql中的数据库

Hey i'm new to php/mysql and i'm trying to execute a very simple php code that will display the contents of the table. I feel like the code is perfect, and i get no error messages, but for some reason it doesn't work. I know you guys hate debugging questions like this, but if you could help i'd appreciate it. here's the php.

<?php 

 $conn=mysql_connect("localhost","demo","abc") or die(mysql_error()); 
  mysql_select_db("practice");

  $sql="SELECT*FROM contact"; 

  $result=mysql_query($sql,$conn) or die(mysql_error()); 

   while($row=mysql_fetch_assoc($result)){ 
     foreach($row as $name => $value){ 
       print "$name: $value <br>
";
              } //end foreach
                 print "<br /> 
";
              } //end while



                  ?>

You're using the old mysql library which is a no no

Get comfy with the Mysqli Extension for all your database access needs. I'll even refactor this a bit for you.

$conn = new Mysqli('localhost', 'demo', 'abc', 'practice');

$sql = "SELECT*FROM contact";

$results = $conn->query($sql);

while($row = $results->fetch_assoc())
{
  var_dump($row);
}

edit: JimiDini posted a link that you should definitely read. http://phptherightway.com/

try this

     // Report simple running errors
    error_reporting(E_ERROR | E_WARNING | E_PARSE); 

   // or if you want to enable all PHP error reports, use this code below and comment out the one above
   //error_reporting(-1);

  $dbhost = 'localhost';// Server name (usually localhost)
  $dbuser = 'user';// SQL Username (Make sure the user has access to the database!).
  $dbpass = 'password';// SQL Password.
  $dbase = 'db name';// SQL Database Name.

  //connection to the database
   $conn = mysql_connect($dbhost,$dbuser,$dbpass) or die(mysql_error()); 


    $sql = "SELECT * FROM `contact`"; 

    $result = mysql_query($sql); 

    while($row = mysql_fetch_assoc($result)){ 
      print_r($row);
    }

but you should use mysqli in the future