I have some Questions......

[mersal]

Hi

I am new at php

I have some querys about This script:

<?php

$server = "localhost";
$db_user = "root";
$db_pass = "";
$database = "test";
$timeoutseconds = 300;

$timestamp = time();
$timeout = $timestamp-$timeoutseconds;

mysql_connect($server, $db_user, $db_pass);
$insert = mysql_db_query($database, "INSERT INTO useronline VALUES ('$timestamp','$REMOTE_ADDR','$PHP_SELF')");
if(!($insert)) {
print "Useronline Insert Failed > ";
}
$delete = mysql_db_query($database, "DELETE FROM useronline WHERE timestamp<$timeout");
if(!($delete)) {
print "Useronline Delete Failed > ";
}
$result = mysql_db_query($database, "SELECT DISTINCT ip FROM useronline WHERE file='$PHP_SELF'");
if(!($result)) {
print "Useronline Select Error > ";
}
$user = mysql_num_rows($result);

mysql_close();
if($user == 1) {
print("<b>$user</b> user online\n");
} else {
print("<b>$user</b> users online\n");
}
?>

I want to know what means this variables ($PHP_SELF,$REMOTE_ADDR) always seen at other scripts and specially ($PHP_SELF)?

Thanks

MERSAL

[[deleted]]

Manuals are your friends.
http://www.php.net/manual/en/language.variables.predefined.php

[mersal]

Can you give me simple example for ($PHP_SELF) for more understanding ?

Thank you 🙂

MERSAL

[[deleted]]

The simplest use is to print a new link to the script itself:

<?
echo "<a href=".$PHP_SELF.">click me</a>";
?>

[mersal]

thanks