PHP issue with random mysql rows - php

Question

I'm having a little problem with php, basically I want to get a random row from my mysql database, I am really new to php and mysql so please be kind and explain me what's going on. I've already granted all permissions on mysql, now I just have to figure out what's going on, i tried to put some echoes to debug but it seems like anything happens, there's just a blank page with nothing on it, this drives me crazy so I'd like to resolve it. Here's the code
<?php
echo "test";
$host="127.0.0.1"; // Host name
$username="username"; // Mysql username
$password="password"; // Mysql password
$db_name="mine"; // Database name
$tbl_name="accounts"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
// Select a random account
$min=1;
$row=mysql_fetch_assoc(mysql_query("SHOW TABLE STATUS LIKE 'mine.accounts';"));
$max=$row["Auto_increment"];
$random_id=rand($min,$max);
$row=mysql_fetch_assoc(mysql_query("SELECT * FROM `mine`.`accounts` WHERE id='$random_id'");
echo $row["username"]. ":" . $row["password"]
?>
// --- UPDATE ---
<?php
error_reporting(E_ALL); ini_set('display_errors', 1);
$host="127.0.0.1"; // Host name
$username="username"; // Mysql username
$password="password"; // Mysql password
$db_name="mine"; // Database name
$tbl_name="accounts"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
// Select a random account
$row = mysql_query("SELECT username AND password FROM accounts order by RAND() LIMIT 1");
WHILE ($data = mysql_fetch_array($row))
ENDWHILE;
echo $row['username'] . " " . $row['password'];
?>

Answer 1

On this line, you forgot the closing parentheses.
$row=mysql_fetch_assoc(mysql_query("SELECT * FROM `mine`.`accounts` WHERE id='$random_id'");
Hence the single closing parentheses while you open two.
$row=mysql_fetch_assoc(mysql_query("SELECT * FROM `mine`.`accounts` WHERE id='$random_id'"));
And you'll have to use a while loop to make $row output anything, since fetch_assoc returns an associative array:
while($row = mysql_fetch_assoc(<...>){
$max = $row['Auto_increment'];
}
Also you might wanna look into Prepared Statements or PDO as mysql_* Functions are officially deprecated.