How can I add array values to a MySQL query? - php

Question

I'm using the following code to sort MySQL queries into time/date:
mysql_select_db("user_live_now", $con);
$result = mysql_query("SELECT * FROM users_newest_post ORDER BY users_date_post DESC");
while($row = mysql_fetch_array($result))
{
print($row['user']);
}
instead of having the PHP run through and show all the values in the table can I have it show the values from an array?

Answer 1

So, you want to find specific users in the SQL query to return? Build your query programmatically:
$users = array('User1','John','Pete Allport','etc');
$sql = "SELECT * FROM `users_newest_post` WHERE ";
$i = 1;
foreach($users as $user)
{
$sql .= "`username` = '$user'";
if($i != count($users))
{
$sql .= " OR ";
}
$i++;
}
$sql .= " ORDER BY `users_date_post` DESC";
$result = mysql_query($sql);
Which would get you a query like:
SELECT * FROM `users_newest_post`
WHERE `username` = 'User1'
OR `username` = 'John'
OR `username` = 'Pete Allport'
OR `username` = 'etc'
ORDER BY `users_date_post`
DESC
So, you want to find all posts for a certain date or between two dates, kinda hard to do it without knowing the table structure, but you'd do it with something like this:
//Here's how to find all posts for a single date for all users
$date = date('Y-m-d',$timestamp);
//You'd pull the timestamp/date in from a form on another page or where ever
//Like a calendar with links on the days which have posts and pass the day
//selected through $_GET like page.php?date=1302115769
//timestamps are in UNIX timestamp format, such as you'd get from time() or strtotime()
//Note that, without a timestamp parameter passed to date() it uses the current time() instead
$sql = "SELECT * FROM `posts` WHERE `users_date_post` = '$date'"
$results = mysql_query($sql);
while($row = mysql_fetch_assoc($results))
{
echo $row['post_name'] . $row['users_date_post']; //output something from the posts
}
//Here's how to find all posts for a range of dates
$startdate = date('Y-m-d',$starttimestamp);
$enddate = date('Y-m-d',$endtimestamp);
//Yet again, date ranges need to be pulled in from somewhere, like $_GET or a POSTed form.
//Can also just pull in a formatted date rather than a timestamp and use it straight up instead, rather than going through date()
$sql = "SELECT * FROM `posts` WHERE `users_date_post` BETWEEN '$startdate' AND '$enddate'";
//could also do:
//"SELECT * FROM `posts` WHERE `users_date_post` > '$startdate' AND `users_date_post` < '$endate'"
$results = mysql_query($sql);
while($row = mysql_fetch_assoc($results))
{
//output data
}
To find posts for a specific user you would modify the statement to be something like:
$userid = 5; //Pulled in from form or $_GET or whatever
"SELECT * FROM `posts` WHERE `users_date_post` > '$startdate' AND `users_date_post` < '$enddate' AND `userid` = $userid"

Answer 2

To dump the result into an array do the following:
mysql_select_db("user_live_now", $con);
$result = mysql_query("SELECT * FROM users_newest_post ORDER BY users_date_post DESC");
while($row=mysql_fetch_assoc($result))
{
$newarray[]=$row
}

Answer 3

What you probably want to do is this:
$users = array("Pete", "Jon", "Steffi");
$users = array_map("mysql_real_escape_string", $users);
$users = implode(",", $users);
..("SELECT * FROM users_newest_post WHERE FIND_IN_SET(user, '$users')");
The FIND_IN_SET function is a but inefficient for this purpose. But you could transition to an IN clause with a bit more typing if there's a real need.

Answer 4

$sql = 'SELECT * FROM `users_newest_post` WHERE username IN (' . implode(',', $users) . ')';