Problem with PHP Page connecting to DB

<?php

$dbserver="localhost";
$username="root";
$pass="root";

$link=mysql_connect("$dbserver","$username","$pass");
if(!$link){die('DB Connection Failed'.mysql_error()); }
echo('connected');
    $Name=$_POST["namei"];
    $ID=$_POST["pid"];
    $Address=$_POST["address"];
    $Phone=$_POST["phone"];

    $query="INSERT INTO contact(Name,ID,Address,Phone) VALUES('".$Name."',".$ID.",'".$Address."',".$Phone.");";

    echo($query);



?>

The code above is used by me to connect to a mysql db, i'm posting the contents to this page from an html page. As i checked there is no problem with POST. but on click of submit it gives me an error '500 Internal Server Error'.

I'm using Apache 2.2 Server, and 开发者_StackOverflow社区mysql 5.5.

Can any one tell what is my mistake?

Thank you

First please run

<?php
echo 'phpversion: ', phpversion(), "<br />\n";
if ( !extension_loaded('mysql') ) {
    die('mysql module not available');
}
echo 'mysql_get_client_info: ', mysql_get_client_info(), "<br />\n";
die;

to check whether a) you can run any php script and b) the mysql_* functions are available.
Then try

<?php
echo "start<br />\n";
error_reporting(E_ALL);
ini_set('display_errors', true);
flush();

$dbserver="localhost";
$username="root";
$pass="root";

$link=mysql_connect($dbserver, $username, $pass);
if(!$link) {
    die('DB Connection Failed '.mysql_error());
}
echo "connected<br />\n";
if ( !mysql_select_db('dbname here', $link) ) {
    die('DB selection failed. '.mysql_error($link));
}
echo "db selected<br />\n";

$Name = mysql_real_escape_string($_POST['namei'], $link);
$ID = mysql_real_escape_string($_POST['pid'], $link);
$Address = mysql_real_escape_string($_POST['address'], $link);
$Phone = mysql_real_escape_string($_POST['phone'], $link);

$query = "
    INSERT INTO
        contact
        (Name,ID,Address,Phone)
    VALUES
        ('$Name', '$ID','$Address','$Phone')
";
echo '<pre>Debug: query=', htmlentities($query), "</pre>\n"; 

It prints something in any case (echo/flush) and sets error_reporting + display_errors so that error messages are sent to the client (you don't want that in production, don't forget to remove those lines).
I also added the necessary calls to mysql_select_db() and mysql_real_escape_string() (needed as soon as the script really sends the query to the mysql server).

K,

You should add

ini_set('display_errors', 1); 
error_reporting(E_ALL);

To the beginning of your script. This will stop the 500 errors and give you the proper error message so you have a better idea of what is going wrong.

It might be the echo($query); line, you only need echo $query; without the parentheses.