I have checked all previous versions of this question and in those cases it was evident as to why it wasn't working but when I query my database it is returning no rows. There is only one row right now so I am completely confused as to why the query returns empty. Any advice would be helpful.
$prodSQL = "SELECT * FROM products INNER JOIN shopPage ON products.storePage_id = shopPage.storePage_id
INNER JOIN gallery ON products.gallery_id = gallery.gallery_id
INNER JOIN image ON products.image_id = image.image_id WHERE products.storePage_id = ".$_GET['shop_id'];
$productInfo = $conn->query($prodSQL) or die ("Couldn't execute query: ".mysqli_error($prodSQL));
$row = $productInfo->fetch_assoc();
$gallery_id = $row['gallery_id'];
$mainTitle = $row['storePage_title'];
if($productInfo->num_rows === 0)
{
echo 'No results';
}
$productInfo->close();
I am creating a website in php to log ping pong scores for my school, and currently the player who wins will log the WinnerID, LoserID, PointsFor, PointsAgainst. I have two tables with the following relationships.
Table: users
user_ID (PK)
username
Elo
Table: games
game_id (PK)
WinnerID (FK)
LoserID (FK)
PointsFor
PointsAgainst
My insert statement in the php file is:
INSERT INTO games(WinnerID,LoserID,PointsFor,PointsAgainst) VALUES('$Winner_ID','$Loser_ID','$userscore','$oppscore')"
Here is what I have tried, but it doesn't display the scores correctly.
SELECT min(u.username) 'Username', COUNT(g.WinnerID) 'Wins', sum(g.PointsFor) 'Points For', sum(g.PointsAgainst) 'Points Against', u.Elo 'Ranking'
from games g
LEFT JOIN users u
on g.WinnerID = u.user_id
Group by g.WinnerID
As you can see by the image above, the points for and points against totals don't add up. Currently, it only displays the stats for whoever was winner. Meaning if PlayerA wins 21-5, it will show up from the select statement, but PlayerB will not show a score of 5-21. Any help is appreciated.
PHP code for page to enter scores:
if(isset($_POST['btn-post']))
{
$opponent = $_POST["opponent"];
//$opponent = array_key_exists('opponent', $_POST) ? $_POST['opponent'] : false;
$userscore = mysql_real_escape_string($_POST['userscore']);
$oppscore = mysql_real_escape_string($_POST['oppscore']);
if($userscore != $oppscore)
{
if($userscore > $oppscore)
{
$Winner_ID = $_SESSION['user'];
$query = mysql_query("SELECT user_id FROM users WHERE username = '".$opponent."'");
$result = mysql_fetch_array($query) or die(mysql_error());
$Loser_ID = $result['user_id'];
$query1 = mysql_query("SELECT Elo FROM users WHERE user_id=".$_SESSION['user']);
$result1 = mysql_fetch_array($query1) or die(mysql_error());
$winnerRating = $result1['Elo'];
$query2 = mysql_query("SELECT Elo FROM users WHERE user_id=".$Loser_ID);
$result2 = mysql_fetch_array($query2) or die(mysql_error());
$loserRating = $result1['Elo'];
$rating = new Rating($winnerRating, $loserRating, 1, 0);
$results = $rating->getNewRatings();
if(mysql_query("UPDATE users SET Elo = " . $results['a'] . " WHERE user_id=".$_SESSION['user']))
{
}
else
{
?>
<script>alert('There was an error while entering winners(user) ranking...');</script>
<?php
}
if(mysql_query("UPDATE users SET Elo = " . $results['b'] . " WHERE user_id=".$Loser_ID))
{
}
else
{
?>
<script>alert('There was an error while entering losers(opp) ranking..');</script>
<?php
}
}
elseif($oppscore > $userscore)
{
$Loser_ID = $_SESSION['user'];
$query = mysql_query("SELECT user_id FROM users WHERE username = '".$opponent."'");
$result = mysql_fetch_array($query) or die(mysql_error());
$Winner_ID = $result['user_id'];
//get rating from user table in database
$query1 = mysql_query("SELECT Elo FROM users WHERE user_id=".$_SESSION['user']);
$result1 = mysql_fetch_array($query1) or die(mysql_error());
$loserRating = $result1['Elo'];
$query2 = mysql_query("SELECT Elo FROM users WHERE user_id=".$Loser_ID);
$result2 = mysql_fetch_array($query2) or die(mysql_error());
$winnerRating = $result1['Elo'];
$rating = new Rating($winnerRating, $loserRating, 1, 0);
$results = $rating->getNewRatings();
$results = $rating->getNewRatings();
if(mysql_query("UPDATE users SET Elo = " . $results['b'] . " WHERE user_id=".$_SESSION['user']))
{
}
else
{
?>
<script>alert('There was an error while entering losers(user) ranking...');</script>
<?php
}
if(mysql_query("UPDATE users SET Elo = " . $results['a'] . " WHERE user_id=".$Winner_ID))
{
}
else
{
?>
<script>alert('There was an error while entering winners(opp) ranking...');</script>
<?php
}
}
if(mysql_query("INSERT INTO games(WinnerID,LoserID,PointsFor,PointsAgainst) VALUES('$Winner_ID','$Loser_ID','$userscore','$oppscore')"))
{
?>
<script>alert('Your scores were successfully entered');</script>
<?php
}
else
{
?>
<script>alert('There was an error while entering your score...');</script>
<?php
}
}
else
{
?>
<script>alert('There cannot be a tie in ping pong, please re-enter your scores...');</script>
<?php
}
}
?>
Your query fails because it doesn't take into account the rows where the player loses. You can fix that by using unions. The following query should do what you want:
SELECT username AS "Username",
SUM(wins) AS "Wins",
SUM(PF) AS "Points For",
SUM(PA) AS "Points Against",
elo AS "Ranking"
FROM (
(SELECT users.user_ID,
users.username AS username,
COUNT(games.WinnerID) AS wins,
SUM(games.PointsFor) AS PF,
SUM(games.PointsAgainst) AS PA,
users.Elo AS elo
FROM users, games
WHERE games.WinnerID = users.user_ID
GROUP BY users.user_ID)
UNION ALL
(SELECT users.user_ID,
users.username AS username,
0 AS wins,
SUM(games.PointsAgainst) AS PF,
SUM(games.PointsFor) AS PA,
users.Elo AS elo
FROM users, games
WHERE games.LoserID = users.user_ID
GROUP BY users.user_ID)
) AS t
GROUP BY username
ORDER BY user_ID;
Note that in the "losing query" the field PointsAgainst should be counter as the player's "points for" and vice-versa.
Try it as an inner join, and get rid of the MIN() on the username column:
SELECT u.username, COUNT(g.WinnerID),
SUM(g.PointsFor), SUM(g.PointsAgainst), u.Elo
FROM users u, games g
WHERE u.user_id = g.WinnerID
GROUP BY u.username, u.Elo;
Also, before anyone else takes you to task, you should be using mysqli instead of mysql (or better yet, PDO) and you should be using prepared statements instead of dynamic SQL.
Your
INSERT INTO games(WinnerID,LoserID,PointsFor,PointsAgainst) VALUES('$Winner_ID','$Loser_ID','$userscore','$oppscore')
query contains the $userscore and $oppscore values in a potentially wrong order. The $Winner_ID and $Loser_ID may change in your conditional processing, but $userscore and $oppscore are not similarly flipped at that time.
Also your conditional structure is in general unnecessarily verbose. It seems like you should be able to just determine the winner and loser ID and score first, and then do all your processing once instead of resorting to error-prone copy-paste duplication of near-identical code.
I have a table of favourites with 'id' 'userid' and 'postid'. I'm trying to select all the entries in 'postid' when 'userid' = 1 for example.
I also have a table of posts with 'id' and others of content. I then want to select all the rows where a 'postid'='id' and then echo the content of those rows.
Essentially filtering the posts by which have been favourited by the user.
What I've got is
<?php
include 'connect.php';
$user = $_SESSION['id'];
$getfaves = mysql_query("SELECT postid FROM Favourites where userid='$user'") or die(mysql_query());
if ($rowfave = mysql_fetch_assoc($getfaves))
{
$faveposts = $rowfave['id'];
$getposts = mysql_query("SELECT * FROM Posts where id='$faveposts' ORDER BY id DESC");
while ($row = mysql_fetch_assoc($getposts))
{
$content = 'content';
echo ($content);
}
}
?>
(the $content = 'content'; is just an example, it's not what I'm actually using in my code)
Obviously this is incorrect, probably because I want to select a list of ids and then search for everything in that list, but I've only coded to look for one item. However I don't know how to correct this.
Thanks in advance for any assistance.
there is a more simple way to do that using just one sql query with the help of INNER JOIN.
so your query will be
SELECT POST.*
FROM `Favourites`
INNER JOIN `Post`
ON Post.id = Favourites.postid WHERE (Favourites.userid='$user')
ORDER BY Post.id DESC;
here is doc about INNER JOIN and its utilities
Please let me know if you need more help,
the php part:
<?php
include 'connect.php';
$user = $_SESSION['id'];
$sql="SELECT POST.*
FROM `Favourites`
INNER JOIN `Post`
ON Post.id = Favourites.postid WHERE (Favourites.userid='$user')
ORDER BY Post.id DESC";
$conn = new mysqli($servername, $username, $password,$dataBase);
$Result = $conn->query($sql);
while($row = $Result->fetch_assoc()) {
//do what you want with the $row, it contain ur resault
}
?>
feel free to test it and report the problem if there is one
I have two tables in my database:
1) blog_table
2) content
In blog_table I have values called postID that may or may not match up to values called id in the table content. I am wanting to know how I can write a while loop or foreach loop that will cycle through content table and perform one action if the id equals the value of postID in the blog_table and perform a different action if it doesn't.
Right now I can only get id = postID
$blog_table = $_REQUEST['blog_table'];
$getblogtable = mysql_query("SELECT * FROM content WHERE type = '5' AND blogID = '{$_REQUEST['id']}' ORDER BY `order` ASC");
while ($row = mysql_fetch_assoc($getblogtable))
{
$getblogposts1 = mysql_query("SELECT postID FROM `$blog_table`");
while ($row1 = mysql_fetch_assoc($getblogposts1))
{
if( $row1['postID'] == $row['id']) {
echo "do something<br>";
}else{
echo "do something else<br>";
}
} echo "<p></p>";
}
[Edit based on OP's comments and revised question]
$getblogposts = mysql_query("SELECT * FROM content WHERE type = '5' AND blogID = '{$_REQUEST['id']}' ORDER BY `order` ASC");
while ($row = mysql_fetch_assoc($getblogposts))
{
$matches = mysql_query("SELECT * FROM $blog_table WHERE postID = $row['id']");
if (mysql_num_rows($matches) > 0)
{
// do something
}
else
{
// do something else
}
}
Regarding a different design, I can't say for sure that it's necessary, but I don't like running a loop of queries like this. I think one query should be enough to get everything you need in this case. Maybe if you describe your application, we could find a better query or more appropriate design.
Just providing an easier to see solution for you to your problem.
I suggest using inner joins which will solve the issue at hand.
For example, Something like:
SELECT * FROM content AS C INNER JOIN $blog_table AS B on B.postID = C.id
Here is a great introduction to joins (inner, left, right, full):
http://www.w3schools.com/sql/sql_join.asp
$blog_table = $_REQUEST['blog_table'];
$getblogtable = mysql_query("SELECT postID FROM `$blog_table`");
while ($row = mysql_fetch_assoc($getblogtable))
{
$postID = $row['postID'];
$getblogposts1 = mysql_query("SELECT * FROM content WHERE id = '$postID' ORDER BY `order` ASC");
while ($row1 = mysql_fetch_assoc($getblogposts1))
{
// if( $row1[id] == $postId )
// do something
// else
// do something else
}
}
Im trying to call all users from a database with the same interests as the current, logged in user on my website.
I have the following
// Get Session USER interest
$interestsquery = "SELECT `interest` FROM `user_interests` WHERE `user_id` = " . $usersClass->userID();
$result = mysql_query($interestsquery);
$interests = array();
while(list($interest) = mysql_fetch_array($result))
$interests[] = $interest;
$interest1 = $interests['1'];
$interest2 = $interests['2'];
$interest3 = $interests['0'];
// END INTERESTS
//USers with Same Interests
$interests_query = "SELECT * FROM produgg_users
join user_interests on produgg_users.id = user_interests.user_id
where interest = '$interest1' and produgg_users.id != '".$usersClass->userID()."'";
$interests_result = mysql_query($interests_query) or die(mysql_error());
if($interests_result != 0) {
while($interests_row = mysql_fetch_array($interests_result, MYSQL_ASSOC))
{
echo $interests_row['user_id'];
}
}
else
{
print "No users to display!";
}
//END SAME INTERESTS
which doesnt bring back any data, yet if I add (beneath //USers with Same Interests)
$interest1 = 'footy';
the interests_query seems to work, can anybody see where im going wrong?
My problem seems to lie here...
$interest1 = $interests['1'];
$interest2 = $interests['2'];
$interest3 = $interests['0'];
// END INTERESTS
//USers with Same Interests
$interest1 = 'footy';
If I manually assign a value to $interest variable it works, but i need to get use the value from the array above, does this make sense?
If your code brings back the correct data when you add $interest1 = 'footy'; line, that would imply that there is something wrong with the value of that variable when you don't. Have you tried var_dump($interest1); right under //Users with Same Interests line to see what kind of input you get from your interestsquery?
I would expect the var_dump to not return a valid string (since if it would, the query would work following the $interest1 = 'footy'; assumption), so you would have to look at what interestsquery returns wrong.
Looks like you querying user_id from user_interests as number, but from produgg_users as string. Maybe there's a problem
You can do it with one query:
$userID = mysql_real_escape_string($usersClass->userID());
$sql = "
SELECT * FROM user_interests AS ui1
JOIN LEFT user_interests AS ui2 ON ui1.id = ui2.id
JOIN LEFT produgg_users AS pu ON ui2.user_id = pu.id
WHERE ui.user_id = " . userID ;