I am creating a baseball website and I am learning php as I go. I have hit a snag with something I am trying to do; here is what my current code shows:
here is my code:
When I load my files that update the scores, if the game hasn't started the scores are NULL. Is there a code to change it to 0 without having to change it in my database. Any info will be helpful
In your select statement you can use the IFNULL(expr1, 0) function, but you will need to list your columns explicitly instead of using select *. So it would be roughly:
select
game_date,
game_time,
...,
IFNULL(AWAY_SCORE, 0),
IFNULL(HOME_SCORE, 0)
FROM scoreboard;
Yup, by way of PHP. It could also be done in the database query
while($row = $result->fetch_assoc(){
$ascore = $row['score'];
$hscore= $row['score'];
if($ascore == ""){
$ascore = 0;
if($hscore== ""){
$hscore = 0;
}
REST OF YOUR CODE HERE
}
}
Related
Im trying to set a php variable to a field and row of a database. I use:
$moped_select = "SELECT * FROM moped_details WHERE moped_ID='$_SESSION[moped_number]'";
$selected_moped = $db->query($moped_select);
if (($selected_moped->rowCount()) >= 1) {
foreach($selected_moped as $row){
$moped_rate = $row['rate'];
}
This doesn't set $moped_rate as the field and row, I have seen other people use this line before and it works. Whats even weirder is that I use a similar line to this to place data in a form. Which looked like this (keep in mind it is inside a foreach(x as $row) loop:
echo "<td>".$row['model']."</td>";
This echos out correctly so im kinda confused why Any suggestions would be appreciated <3.
Your code should as below
$db=new PDO('mysql:host=localhost','username','password');
$moped_select = "SELECT * FROM moped_details WHERE moped_ID=?";
$selected_moped = $db->prepare($moped_select);
$db->execute([$_SESSION["moped_numberf"]]);
if(($db>rowCount()) >= 1) {
while($row=$selectedmoped->fetch(PDO::FETCH_ASSOC){
$moped_rate = $row['rate'];
}
I am making Tournament mod. And I do not know how to correctly do some operations with fetched array.
What my code is doing, is that it takes data from Tournament table and add it to array. Then print it in HTML table, so all users can see the place where he has.
How can I correctly get the first, second, third array data for the first 3 winners and give them a price? And how can I deal with players who have the same amount of points?
Right now the query below seems to not work too, all statements are positiv and it should execute the function.
if($counter == 1) {
$GLOBALS['DATABASE']->query("UPDATE ".USERS." SET `atm` = `atm` + 20000 WHERE `id` = ".$recordRow['id_owner']." ;");
}
Sorry, my English is not good and I tried to search for the answers but didn't find anything, because i do not know for what PHP solution should i search.
My code:
$recordFetch = $GLOBALS['DATABASE']->query("SELECT *FROM `uni1_tournament` ORDER BY wons DESC;");
$counter = 0;
$RangeList = array();
while ($recordRow = $GLOBALS['DATABASE']->fetch_array($recordFetch)) {
$counter += 1;
$RangeList[] = array(
'id' => $recordRow['id_owner'],
'name' => $recordRow['name'],
'points' => $recordRow['wons']*5,
'counter' => $counter,
);
if($t_time > TIMESTAMP) {
if($counter == 1) {
$GLOBALS['DATABASE']->query("UPDATE ".USERS." SET `atm` = `atm` + 20000 WHERE `id` = ".$recordRow['id_owner']." ;");
}
elseif($counter == 2) {
//to do;
} elseif($counter == 3) {
//to do;
}
}
}
Make query like this "select * from uni1_tournament GROUP BY points ORDER BY
points desc limit 3";
If you're using regular mysql or mysqli (been a while since I have for either, moved to doctrine a while back), fetch_array needs to be ran on the results and not the GLOBALS['DATABASE'] variable (guessing this a global variable for the database connection).
Try changing
while ($recordRow = $GLOBALS['DATABASE']->fetch_array($recordFetch)) {
to
while ($recordRow = $recordFetch->fetch_array()) {
In order to use your original formatting, I believe fetch_array needed to be mysqli_fetch_array instead.
i.e
while ($recordRow = $GLOBALS['DATABASE']->mysqli_fetch_array($recordFetch)) {
well, i wanna pull out some data from a mysql view, but the wuery dos not seem to retrieve anything ( even though the view has data in it).
here is the code i've been "playing" with ( i'm using adodb for php)
$get_teachers=$db->Execute("select * from lecturer ");
//$array=array();
//fill array with teacher for each lesson
for($j=0;$j<$get_teachers->fetchrow();++$j){
/*$row2 = $get_lessons->fetchrow();
$row3=$row2[0];
$teach=array(array());
//array_push($teach, $row3);
$teach[$j]=mysql_fetch_array( $get_teachers, TYPE );
//echo $row3;*/
$row = $get_teachers->fetchrow();
//$name=$row[0]+" "+$row[0]+"/n";
//array_push($teach, $row1);
echo $row[0]; echo " ";echo $row[1]." ";
//$db->debug = true;
}
if i try something like "select name,surname from users", the query partially works . By partially i mean , while there are 2 users in the database, the loop only prints the last user.
the original query i wanted to execute was this
$get_teachers=$db->Execute("select surname,name from users,assigned_to,lessons
where users.UID=assigned_to.UID and lessons.LID=assigned_to.LID and
lessons.term='".$_GET['term']."'");
but because it didnt seem to do anything i tried with a view ( when you execute this in the phpmyadmin it works fine(by replacing the GET part with a number from 1 to 7 )
the tables in case you wonder are: users,assigned_to and lessons. ( assigned_to is a table connecting each user to a lesson he teaches by containing UID=userid and LID=lessonid ). What i wanted to do here is get the name+surname of the users who teach a lesson. Imagine a list tha displays each lesson+who teaches it based on the term that lesson is available.
Looking at http://adodb.sourceforge.net/ I can see an example on the first page on how to use the library:
$rs = $DB->Execute("select * from table where key=123");
while ($array = $rs->FetchRow()) {
print_r($array);
}
So, you should use:
while ($row = $get_teachers->fetchrow()) {
instead of:
for ($j = 0; $j < $get_teachers->fetchrow(); ++$j) {
The idea with FetchRow() is that it returns the next row in the sequence. It does not return the number of the last row, so you shouldn't use it as a condition in a for loop. You should call it every time you need the next row in the sequence, and, when there are no more rows, it will return false.
Also, take a look at the documentation for FetchRow().
for($j=0;$j<$get_teachers->fetchrow();++$j){
... a few lines later ...
$row = $get_teachers->fetchrow();
See how you call fetchrow() twice before actually printing anything? You remove two rows from the result set for every 1 you actually use.
while ($row = $get_teachers->fetchrow()) {
instead and don't call fetchrow() again within the loop.
Because you're fetching twice first in the loop
for($j=0;$j<$get_teachers->fetchrow();++$j){
... some code ...
// And here you fetch again
$row = $get_teachers->fetchrow();
You should use it like this
while ($row = $get_teachers->fetchrow()) {
I have a SQL database that contains a field. I can get all of the elements in that field by:
$result=mysql_query($sql);
while($row=mysql_fetch_array($result)){
$ftype =$row['ftype']; //name of field is 'ftype'
print $ftype} //do something
I want a random element to be printed out each time the page is opened/refreshed.
Knowing that the result is an array containing the information i want, I want to randomly choose an element of the array. Also, if there are N elements in the array, I want to choose all N elements exactly once before I show any element again for second time. The process repeats itself. I know how to code something like this in java or python, but I don't think that's the way I should go.
I think I need to use javascript, but I'm just not sure what technology to use.
UPDATE:
Patrick's idea seems to be exactly what i was looking for. I thought I would share what I have now and maybe you can suggest optimization. I hope the intent in the code is obvious.
<?
session_start();
if (!isset($_SESSION['count']) || !isset($_SESSION['randomArray'])) {
$count = 0;
$randomArray = array();
$sql="SELECT youtubeurl FROM Foodlist";
$result=mysql_query($sql);
while($row=mysql_fetch_array($result)){
array_push($randomArray,$row['youtubeurl']);
}
shuffle($randomArray);
$_SESSION['randomArray'] = $randomArray;
$_SESSION['count'] = $count;
} elseif ($_SESSION['count'] >= sizeof($_SESSION['randomArray'])){
$_SESSION['count'] = 0;
$randomArray = $_SESSION['randomArray'];
shuffle($randomArray);
$_SESSION['randomArray'] = $randomArray;
} else{
$randomArray = $_SESSION['randomArray'];
$count = $_SESSION['count'];
echo $randomArray[$count];
$_SESSION['count']++;
}
?>
You can do this without Javascript, however you'll need to open/maintain a session.
Pseudocode:
data = data_from_mysql()
choice = random.choice(data, exclude = SESSION['choices'])
SESSION['choices'].append(choice)
print choice
if len(SESSION['choices']) == len(data):
SESSION['choices'] = []
If you want a random result let the dbms take care of it. Add this to the bottom of your sql query.
ORDER BY RAND()
LIMIT 1
I would like to have a comment section with replies to comments. The replies will only go one level. For example.
Parent Comment
-- Here is a reply
-- Here is another reply
-- It won't go further than this one tier
My MySQL looks like this:
comment_id, comment, parents_id
if parents_id is 0, it is the parent. if it has a number, that number will correspond to the comment_id, as it will be its child.
now, i've done this crappy code below, but it seems the second loop messes it up and only displays the first div correctly with its children. i believe it is because i'm calling mysql_fetch_row twice...
$query_show_comments = "SELECT * FROM article_comments WHERE article_id = '$article_id'";
$results_show_comments = mysql_query($query_show_comments);
$num_rows_comments = mysql_num_rows($results_show_comments);
for ($i = 0; $i < $num_rows_comments; $i++) {
$comment = mysql_fetch_row($results_show_comments);
echo "<p>comment_id: $comment[0]</p>";
if ($comment[5] == 0) {
echo <<<_HTML
<div class="dispArticle">
<p><strong>Commenter Name commented # 11/22/10 10:10:10pm</strong></p>
<p>$comment[2]</p>
_HTML;
for ($j = 0; $j < $num_rows_comments; $j++) {
$replies = mysql_fetch_row($results_show_comments);
if ($replies[5] > 0 AND $replies[5] == $comment[0]) {
echo <<<_HTML
<div class="comment"><p><strong>Reply Name replied # 11/22/10 10:10:10pm</strong></p>
<p>child_id: $replies[0]</p>
<p>parent_id: $comment[0]</p>
<p>$replies[2]</p>
</div>
<br />
_HTML;
}
}
}
echo "</div>";
}
Been searching for hours and this is what I've found.
Use multiple tables (would like to keep it in one table so less queries)
Use multiple queries (same as above)
Feed into an array first then sort it all out (what if the comments are long and there are a lot? I just did a query AND had to do more server side processing of feeding it into an array, sorting then displaying...)
The problem is that mysql_fetch_row() will always fetch the next row returned by the query, and that could be in any order. For what you are doing to work, you would need a post to be followed immediately by its child comments every time. This is a shaky solution, so I would suggest you use #3 as it is really the same thing as what you are doing.
I also have a couple of suggestions: use mysql_fetch_assoc() over mysql_fetch_row() and use the names of the columns rather than their numbers as this makes the code much more readable and easier to use. You will have to change your query to order by the ascending parent ID to ensure that all parents are set first. Then:
$query = "query";
$result = mysql_query($query);
$comments = array();
while ($row = mysql_fetch_assoc($result)) {
if ($row['parent_id']) {
$comments[$row['parent_id']]['children'][] = $row;
}
else {
$row['children'] = array();
$comments[$row['comment_id']] = $row;
}
}
Now all of the children are associated with parents. Just iterate through the array.
It's not too hard. You should store all comments in one table and have parent_id
parent_id of 0 means it's a comment, parent_id > 0 would point to id of a message in the same table for which it's a reply.
You would also have article_id, just like in your current example.
The trick you need is to do just one SQL select but reference the same table twice.
You sql will be something like this:
SELECT
M.id as id,
M.id as com_mid,
M.post_subject as com_subject,
M.message_body as com_body,
M2.id as rpl_mid,
M2.post_subject as rpl_subject,
M2.message_body as rpl_body,
M2.parent_id
FROM
MESSAGES AS M
LEFT JOIN MESSAGES as M2 on M2.parent_message_id = M.id
WHERE M.article_id = :aid
AND M.parent_id = 0
ORDER BY com_mid ASC,
rpl_mid ASC
Then once you get result of this sql, you will easily figure out how to handle the result array to display messages and replies
You need a second query. Here's an example TRYING to use your code.
$query_show_comments = "SELECT * FROM article_comments WHERE article_id = '$article_id'";
$results_show_comments = mysql_query($query_show_comments);
$num_rows_comments = mysql_num_rows($results_show_comments);
for ($i = 0; $i < $num_rows_comments; $i++) {
$row_comment = mysql_fetch_row($results_show_comments);
echo "<p>comment_id: $row_comment[0]</p>";
if ($row_comment[5] == 0) {
echo <<<_HTML
<div class="dispArticle">
<p><strong>Commenter Name commented # 11/22/10 10:10:10pm</strong></p>
<p>$row_comment[2]</p>
_HTML;
$query_show_replies = "SELECT * FROM article_comments WHERE parent_id = '$article_id'";
$result_replies = mysql_query($query_show_replies);
while( $row_reply = mysql_fetch_row($results_show_comments) ) )
echo "
<div class=\"comment\"><p><strong>Reply Name replied # 11/22/10 10:10:10pm</strong></p>
<p>child_id: $row_reply[0]</p>
<p>parent_id: $row_reply[1]</p>
</div><br />
";
}
}
echo "</div>";
}
You're doing several things in your code that I don't like to do, not saying it can't be don't that way. My advice is to take a more advanced approach to architecting your web applications:
Use while() loops when reading data from queries, it's more error tolerant
don't use the "echo <<<" blocks because it makes code harder to read
technically speaking, you'll want to use htmlspecialchars on all output to a web page, so the <<< shouldn't be used anyways
better yet, use a template system to extricate your markup (view) from your PHP, conside Smarty because it's easy even if performance isn't quite stellar
in fact, while you're at it, consider abstracting your data code into a separate layer
no matter how you get the data, you shouldn't rely on indexed fields when you're using a SELECT *.. because the order could change. What I mean is, instead of using $comment[0] or $comment[1], use $comment['id'] or htmlspecialchars($comment['text'])