Tengo un error al ejecutar un código php, me da este error:
Warning: mysql_numrows(): supplied argument is not a valid MySQL result resource in /var/www/stats/on.php on line 20
Online players:0
El código php es este:
Código PHP:
<?php
//first you need to define db info
define('mySQL_hostname', '127.0.0.1'); //database IP
define('mySQL_database', 'Database'); //database name
define('mySQL_username', 'User'); //database user
define('mySQL_password', 'Pass'); //database password
//connects to mysql
$db_link = mysql_pconnect( mySQL_hostname, mySQL_username, mySQL_password )
or die( 'Error connecting to mysql<br><br>'.mysql_error() );
//connects to Database
$db_select = mysql_select_db( mySQL_database, $db_link )
or die( 'Error connecting to Database<br><br>'.mysql_error() );
//selects desired table
$chars=mysql_query("SELECT * FROM characters");
//tells how much rows are there (will come helpfull with while loops)
$rows =mysql_numrows($characters);
$i=0;
$x=0;
//while $i is smaller than number of rows repeat the code
while ($i < $rows) {
$online=mysql_result($chars,$i,"online"); //looks into characters table, under column online(if player is online its "0" else "1"), at row $i
if ($online == 1) { $x++; } // if column online at row $i is "1", increase $x
$i++; //increase $i
}
print 'Online players:<em>'.$x.'<em>'; //prints out the $x number of players online
?>