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Get All Entries From Today (mysql)


I currently have a page that each time a user visits it, the pageid and timestamp is thrown into a mysql daabase.

so the database looks like so:
linkid time
3 2007-08-22 17:26:21
3 2007-08-20 17:26:21
3 2007-08-22 18:36:59
2 2007-08-22 18:37:21

What i need is for php to show the total amount of visits today as per a certain time zone (or if thats not possible, the past 24 hours)

soo..
Search for all occurrences where linkid = 3 today for a specific timezone (or 24 hours)

MORE SPECIFICALLY
User 1: Lives in New York (EST -5)
registers for my site and sends visitors to his linkid (3)

After two days, this is what the mysql table looks like:
linkid time
3 -=- 2007-08-22 17:26:21
3 -=- 2007-08-20 17:26:21
3 -=- 2007-08-22 18:36:59

But mysql time isn't Eastern time, its another timezone. So when a visitor comes to user1's page at 3pm EST, mysql registers the time as 2007-08-22 17:26:21

So... I want to first add/subtract the number of numbers in the mysql database depending upon the user, and then see the amount of visitors for the day.




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******************************
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********************************
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---------
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Code:

<?php
require_once('HTML/Form.php');
require_once('I18N/UnicodeString.php');
require_once('HTML/Table.php');

class Formular
{
private $ServerVar = array("Auswahl","Betreff","Eingabe");

function __construct()
{

$this->ServerVar["Auswahl"] = $_GET['Auswahl'];
$this->ServerVar["Betreff"] = $_GET['Feld'];
$this->ServerVar["Eingabe"] = $_GET['Eingabe'];
$this->MeinFormular();

//$this->sqdb();
if(($this->ServerVar["Betreff"] === null) or
($this->ServerVar["Eingabe"] === null))
{
$this->MeineDB();
$this->TextFeld();
}
elseif (($this->ServerVar["Betreff"] === "") or
($this->ServerVar["Eingabe"] === ""))
{
$this->MeineDB();
$this->TextFeld();
}

else
{
$Auswahl = $this->ServerVar["Auswahl"];
$Betreff = $this->ServerVar["Betreff"];
$Eingabe = $this->ServerVar["Eingabe"];
$this->MeineDB2($Auswahl,$Betreff,$Eingabe);
$this->TextFeld();
}


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