ERROR : fetching data from mysql and showing in on the web - php

Question

<?php
$user = 'root';
$password = 'root';
$db = 'urls';
$host = 'localhost';
$port = 8889;
$link = mysqli_init();
$success = mysqli_real_connect(
$link,
$host,
$user,
$password,
$db,
$port
);
//echo $success;
$query = "SELECT id, title, url, votes FROM link ORDER BY id LIMIT 3";
$result = mysqli_query($success, $query);
$row = mysqli_fetch_array($result, MYSQLI_ASSOC);
printf ("%s (%s)\n", $row["title"], $row["url"]);
/* free result set */
mysqli_free_result($result);
/* close connection */
mysqli_close($link);
?>
So this is the code i wrote. Obviously, the purpose of this is to fetch latest datas from my mysql server and print it out. However, when i run this code on my mac(I'm using MAMP), IT ONLY SHOW '0'. What is wrong with this?

Answer 1

mysqli_real_connect returns a boolean, it does not return a MySQLi resource. Hence you have to run the query on $link and not on $success
$result = mysqli_query($success, $query);
^
Should be
$result = mysqli_query($link, $query);
Without any error checking in place it becomes like a guessing game, please consider error checking whether the connection resulted in an error or the query itself, that will help you a long way.
Also note that you have to either fetch all the rows together in one call (using a different function as to what you use now) or you have to loop through the result to fetch all the rows, with your current code you will get only 1 row at max even when the issue is resolved.
On another note, why are you not using the simpler mysqli_connect option and using this 2 step connection without any special flags being used?

Answer 2

Try it with a bit more error handling
<?php
$user = 'root';
$password = 'root';
$db = 'urls';
$host = 'localhost';
$port = 8889;
echo date('Y-m-d H:i:s', filemtime(__FILE__)), "\r\n";
$link = mysqli_init();
if ( !mysqli_real_connect($link, $host, $user, $password, $db, $port) ) {
trigger_error('connect failed', E_USER_ERROR);
}
else {
$query = "SELECT id, title, url, votes FROM link ORDER BY id LIMIT 3";
$result = mysqli_query($link, $query); // <- you have to pass the connection resource/object here
if ( !$result ) {
trigger_error('query failed', E_USER_ERROR);
}
else {
$row = mysqli_fetch_array($result, MYSQLI_ASSOC);
if ( !$row ) {
echo 'no results';
}
else {
do {
printf ("%s (%s)\n", $row["title"], $row["url"]);
} while($row = mysqli_fetch_array($result, MYSQLI_ASSOC));
}
/* free result set */
mysqli_free_result($result);
}
/* close connection */
mysqli_close($link);
}
( the echo date... line is for checking that you're looking at the output of your latest and greatest script version ;-) )