Sometimes it is necessary to query data from the last 7 days. Here’s how to create a dynamic query inside a script using PHP / MySQL to return a list of users who last visited within X number of days (7 by default):
<?php
$now = time(); // this is the current UNIX timestamp for the server
$days = 7; // change to number of days
$days_ago = date(“Y-m-d H:i:s”, ($now - (86400 * $days));
$query = “SELECT username FROM users WHERE lastvisited > ‘$days_ago’”;
$result = @mysql_query($query,$mysql_link);
if(@mysql_num_rows($result)) {
while($row = mysql_fetch_row($result)) {
print “$row[0] <br />”;
}
}
?>
$now = time(); // this is the current UNIX timestamp for the server
$days = 7; // change to number of days
$days_ago = date(“Y-m-d H:i:s”, ($now - (86400 * $days));
$query = “SELECT username FROM users WHERE lastvisited > ‘$days_ago’”;
$result = @mysql_query($query,$mysql_link);
if(@mysql_num_rows($result)) {
while($row = mysql_fetch_row($result)) {
print “$row[0] <br />”;
}
}
?>
Notes:
- $mysql_link contains the MySQL database connection link.
- 86400 is the number of seconds in a day: 60 seconds x 60 minutes x 24 hours = 86,400