I need sum up quantity items. I have a database query, I print values:
while ($row = mysqli_fetch_array($lista)) {
echo $row['przedmiot'].":".$row['ilosc'].'<br>';
}
then I get this result:
item1:1
item1:3
item2:1
item1:3
item2:5
I need to add these values, I would like to get this result:
item1:7
item2:6
#Sascha's answer will work, but I'd suggest a different approach - instead of querying all these rows, transferring them from the database to your application and then having to loop over them in the code, let the database do the heavy lifting for you:
SELECT przedmiot, SUM(ilosc) AS ilosc
FROM mytable
GROUP BY przedmiot
This should help:
$result=[];
while ($row = mysqli_fetch_array($lista)) {
echo $row['przedmiot'].":".$row['ilosc'].'<br>';
if (!array_key_exists ($result, $row['przedmiot'])) {
$result[$row['przedmiot']] = $row['ilosc'];
} else {
$result[$row['przedmiot']] += $row['ilosc'];
}
}
Related
We have a PHP script that loops through many XML / CSV files from different websites. Right now we manage to build a good XML / CSV parser script.
The PHP script we wrote is looping though some BIG XML or CSV files. In these XML or CVS files contains Barcodes from different products.
Right now before the script starts I fill an array with the Product ID + Barcode from the MySQL like this:
function Barcodes_Array() {
$sql = "SELECT ProductId, Barcode FROM Products WHERE (Barcode <> '') ";
$res = mysql_query($sql);
while ($rijen = mysql_fetch_assoc($res)) {
$GLOBALS['arrBarcodes'][] = $rijen;
}
}
Each time we loop through the XML (or CSV) files we have to check if the Barcode exists in the array and return the Product ID.
For searching in the function:
$ProductId = SearchBarcodeProduct($EanNr, 'Barcode');
And yet the function:
function SearchBarcodeProduct($elem, $field)
{
$top = sizeof($GLOBALS['arrBarcodes']) - 1;
$bottom = 0;
$ProductId = 0;
while($bottom <= $top)
{
if($GLOBALS['arrBarcodes'][$bottom][$field] == $elem) {
return $GLOBALS['arrBarcodes'][$bottom]['ProductId'];
}
else {
if (is_array($GLOBALS['arrBarcodes'][$bottom][$field])) {
if (in_multiarray($elem, ($GLOBALS['arrBarcodes'][$bottom][$field]))) {
return $GLOBALS['arrBarcodes'][$bottom]['ProductId'];
}
}
}
$bottom++;
}
return $ProductId;
}
We fill in the array because it took forever each time we ask the MySQL Products Table.
My Question is now:
It still takes a VERY long time each time looping through the array of the barcodes. Is there a faster way for any other solutions maybe a different way then a array?
Can someone help please i am working like weeks on this stupid :) thing!
Why do you need 2 functions?
Try just one
function itemBarcode($id) {
$id = intval($id);
$sql = "SELECT ProductId, Barcode FROM Products WHERE ProductId = $id Barcode <> '') ";
$res = mysql_query($sql);
if ($row = mysql_fetch_assoc($res)) {
return $row['barcode'];
} else {
return 0;
}
}
Update if you need to search by barcode you can create another function:
function itemProduct($barcode) {
$sql = "SELECT ProductId, Barcode FROM Products WHERE Barcode = $barcode ";
$res = mysql_query($sql);
if ($row = mysql_fetch_assoc($res)) {
return $row['ProductId'];
} else {
return 0;
}
}
Sounds like you are missing an index on your Barcode column in your database.. A single row lookup using a presumably unique single indexed column should be blisteringly fast.
CREATE INDEX Barcode_Index ON Products (Barcode)
Then simply:
SELECT ProductId FROM Products WHERE Barcode = *INPUT*
You could also make the index UNIQUE if you NULL the Barcode where they currently = '' if there are more than one of these.
Another option is keying the array you have with the Barcode:
while ($rijen = mysql_fetch_assoc($res)) {
$GLOBALS['arrBarcodes'][$rijen['Barcode']] = $rijen;
}
or even just:
while ($rijen = mysql_fetch_assoc($res)) {
$GLOBALS['arrBarcodes'][$rijen['Barcode']] = $rijen['ProductId'];
}
Then you can do a straight look up:
$ProductId = isset($GLOBALS['arrBarcodes'][$Barcode])
?$GLOBALS['arrBarcodes'][$Barcode]['ProductId']
:0;
or:
$ProductId = isset($GLOBALS['arrBarcodes'][$Barcode])
?$GLOBALS['arrBarcodes'][$Barcode]
:0;
N.B Please read the warnings in the comments about use of $GLOBALS and mysql_query.
If you need it, store the barcodes array in an object or variable instead.
PDO is pretty handy, and I think it can also key your returned array for you on fetch.
With the foreach loop, I wanna count how many results are displayed. For example, if it's displaying
Jack Ane
Steve Jobs
Sara Bill
I want to echo that there are 3 results.
Likewise, if it's like
Marc Kil
Bill Smith
I want to echo that there are 2 results.
It's a bit tricky for me becasue this is my code:
<div>
<?php
$container = array();
if (is_array($row))
{
foreach ($row as $data) {
if(!isset($container[$data->first_name . $data->last_name])) {
$container[$data->first_name . $data->last_name] = $data;
echo $data->first_name . " " .$data->last_name . "</div>";
}
}
}
?>
</p>
</div>
How exactly would I be able to do that? Since these values are coming straight from the database, I was thinking of doing a database count but there are duplicate values in the database since I'm logging the views of users with the first and the last name. So when I try to do it, say for example there are 20 Jack Ane in my database. Then it shows me all of the 20 Jack Ane's instead of just one because I just want it once.
Sorry if it's confusing.
Thanks.
I traditional use the count() to do that if you dont use any :
foreach ($row as $data) {
if(!isset($container[$data->first_name . $data->last_name])) {
$container[$data->first_name . $data->last_name] = $data;
echo $data->first_name . " " .$data->last_name . "</div>";
}
}
echo "Results: " . count($row);
Hope that help you.
I suggest you to rewrite your query. If you will do this in right way, you will get faster solution, with no needs to new array and unnecessary "isset" checks.
The reason you get duplicated data from query may be:
1 - Wrong query logic
2 - Query is OK, but you need to use DISTINCT or GROUP BY to remove duplicates
If you use PDO, you can then get number of returned rows just by using rowCount() method
$sql="SELECT * from table WHERE blablabla";
$result = $this->db->query($sql);
$result->rowCount(); // here
Then you can fetch $result->fetchAll(); and print data.
You can to do a SELECT DISTINCT or a GROUP BY across the two columns to have the database do the work and eliminate the duplicate checking in your PHP. To do this you can use something like the following:
SELECT DISTINCT first_name, last_name FROM users;
SELECT first_name, last_name FROM users GROUP BY first_name, last_name;
DISTINCT is more succinct while GROUP BY supports more flexibility.
In your example, since you are building an associative array, you can just do a count() after the loop, but you will have cleaner code if you have the database do it:
$count = count($container);
You could do an easy variable that increments inside your foreach that gives you the exact count, then use the variable to create actions depending on it's value. Because if you count the container and you wish to filter out the results inside the container, you won't get the filtered amount.
<?php
$container = array();
if (is_array($row))
{
$count = 0;
foreach ($row as $data) {
if(!isset($container[$data->first_name . $data->last_name])) {
$container[$data->first_name . $data->last_name] = $data;
echo $data->first_name . " " .$data->last_name . "</div>";
$count++;
}
}
}
if ($count > 0) {
echo "There were $count results.";
}
?>
use:
echo "Results: " . count($container);
I am trying to display multiple columns with multiple rows from a database. It works to display one row, but when I put in the second one it just displays two of the same. Like an echo. How do I get it to display the two different numbers?
$result = mysql_query("SELECT plea, COUNT(plea) as cee FROM tee WHERE section='d' GROUP BY
plea" , $c) or die("two");
$number=mysql_num_rows($result);
if($number>0)
{
$i=0;
while($row_result = mysql_fetch_array($result))
{
$plea.$i = $row_result['plea'];
$cee.$i = $row_result['cee'];
echo $plea.$i." ".$cee.$i."<br><br>";
$i++;
}
}
This is VERY strange code:
$plea.$i = $row_result['plea'];
and NOT doing what you want. It's parsed as:
$plea . ($i = $row_result['plea']);
and boils down to $i getting your value from the query, and then being further executed down to just
TRUE
without EVER modifying the value in $plea. You probably want an array:
$plea[$i] = $row_result['plea'];
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'm trying to make a simple alphabetical list to order items in my database. The thing I can't figure out is how to actually list it.
I would like it to be the same format as you have on miniclip.com
Here's an image
I looked around, but couldnt find an answer really.
(I would like it to finish even at the end of each vertical column, except the last one for sure)
Any help would be welcome!
In MySQL:
SELECT * FROM table ORDER BY name ASC
In PHP:
$fruits = array("lemon", "orange", "banana", "apple");
sort($fruits);
foreach ($fruits as $key => $val) {
echo "fruits[" . $key . "] = " . $val . "\n";
}
fruits[0] = apple
fruits[1] = banana
fruits[2] = lemon
fruits[3] = orange
Assuming that your result set already is sorted by using the ORDER BY clause, to group the results by their first character you just need to remember the first character of the previous entry and print out the first character of the current entry if they are different. So:
$prevLabel = null;
while ($row = mysql_fetch_assoc($result)) {
$currLabel = strtoupper(substr($row['name'], 0, 1));
if ($currLabel !== $prevLabel) {
echo $currLabel;
$prevLabel = $currLabel;
}
echo $row['name'];
}
This will print the first character as a label for each group that’s members have the same first character.
He doesn't seem to have an issue with the storting, but doing the column format and headers for each new letter.
Suppose $arr contains your alphabetically sorted list with numeric keys. each element has indexes 'name' and 'link'. This should be pretty safe assumption for data from a SQL query.
$firstLetter = -1;
$desiredColumns = 4; //you can change this!
$columnCount = (count($arr)+27)/$desiredColumns+1;
echo "<table><tr><td>";
foreach($arr as $key => $cur)
{
if ($key != 0 && $key % desiredColumns == 0) echo "</td><td>";
if ($cur['name'][0] !== $firstLetter)
{
echo "<strong>$firstLetter</strong> <br />"; $firstLetter = $cur['name'][0];
}
echo "".$cur['name']."<br />";
}
echo "</td><tr></table>";
You'll have to treat numbers as a special case, but this is the idea. If you are using a template engine there are obviously better ways of doing this, but I figure you would have mentioned that. This is a rough sketch, making pretty HTML isn't my thing.
--Query-- get table into $arr. I can't see your tables obviously, Im making assumptions if names nad stuff so you'll need to verify or change them
$sql = "SELECT * FROM table T ORDER BY name";
$conn = //you should have this
$res = mysql_query($sql, $conn);
$arr = array();
while($row = mysql_fetch_assc($res)
$arr[] = $row;
// start above code here. This isn't safe for empty query responses or other error but it works
I presume you're using MySQL (or another SQL) database, in which case you should simply retrieve the data in the required order using a SORT BY clause on the lookup SELECT. (Sorting this PHP is trivial via the sort function, but it makes sense to get the database to do this - that's pretty much what it's for.)
In terms of balancing the output of each of the columns, you could get a COUNT of the required rows in your database (or simply use the count of the resulting PHP array of data) and use this to ensure that the output is balanced.
As a final thought, if this is going to be output on a per-page basis, I'd highly recommend generating it into a static file when the structure changes and simply including this static file as a part of the output - generating this on the fly is needlessly resource inefficient.
The mysql option mentioned above is definitely the best bet. If the data comes out of the DM in order, that's the simplest way to go.
Your next option might be to look at the
asort and ksort functions in PHP to find the exact one you're looking for.
http://www.php.net/manual/en/array.sorting.php
How are you pulling the data?
<?php
$result = mysql_query("SELECT titles FROM gamelist ORDER BY title ASC");
while ($row = mysql_fetch_assoc($result)) {
echo "{$result['title']}<br/>";
}
?>
There are two ways to do it.
You could use your database and use the 'order' clause to pull them by a specific field alphabetically.
You could also use either a key sort or value sort on a PHP array.
The PHP functions are sort($array) and ksort($array).
http://php.net/manual/en/function.sort.php
http://php.net/manual/en/function.ksort.php
<?php
$list = $your_list_array_from_database
//if you need info on how to do this, just let me know
sort($list);
foreach($list as $item) {
echo $item;
}
?>
I found this post and had the same problem. I used the code below to output a list by category name with a header equal to the first letter. In my database table (category) I have name and category_letter. So, name = football and category_list = 'F'.
<section>
<?php
try {
$cats_sql = $dbo->prepare("SELECT name, category_list, FROM category WHERE category_list REGEXP '^[A-Z#]' GROUP BY category_list ASC");
$cats_sql->execute();
$results_cats = $cats_sql->fetchAll();
} catch(PDOException $e) {
include('basehttp/error');
}
$array_cats = $results_cats;
if(is_array($array_cats)) {
foreach($array_cats as $row_cats) {
$cat_var = $row_cats[category_list]; // Each Category list title
?>
<aside>
<h1><a name=""><? echo $cat_var ?></a></h1>
<?php
try {
$search_sql = $dbo->prepare("SELECT name, category_list FROM category WHERE category_list=:cat_var ORDER BY name ASC"); // Pulling a list of names for the category list
$search_sql->bindParam(":cat_var",$cat_var,PDO::PARAM_STR);
$search_sql->execute();
$results_search = $search_sql->fetchAll();
} catch(PDOException $e) {
include('basehttp/error');
}
$array_search = $results_search;
if(is_array($array_search)) { // Output list of names which match category
foreach($array_search as $row_search) {
?>
<h2><?php echo $row_search[name]; ?></h2>
<br class="clear">
<?php
}
}
?>
</aside>
<br class="clear">
<?php
}
}
?>
</section>
Its actually Simple....I did similar thing for my project once. I had to pull out all music albums name and categorize them in alphabetical order.
In my table, "album_name" is the column where names are stored.
$sql= "select * from album_table order by album_name ASC";
$temp_char= ""; // temporary variable, initially blank;
using while loop, iterate through records;
while($row= $rs->fetch_assoc())
{
$album_name= $row['album_name'];
$first_char_of_albm= $album_name[0]; // this will store first alphabet;
$first_char_of_albm= strtoupper($first_char_of_albm); // make uppercase or lower as per your needs
if($temp_char!=$first_char_of_albm)
{
echo $first_char_of_albm;
$temp_char= $first_char_of_albm; // update $temp_char variable
}
}
That's it....
I am posting my answer to this old question for 3 reasons:
You don't always get to write your queries to MySQL or another DBMS, as with a web service / API. None of the other answers address PHP sorting without query manipulation, while also addressing the vertical alphabetical sort
Sometimes you have to deal with associative arrays, and only a couple other answers deal with assoc. arrays. BTW, my answer will work for both associative and indexed arrays.
I didn't want an overly complex solution.
Actually, the solution I came up with was pretty simple--use multiple tags with style="float:left", inside of a giant table. While I was sceptical that having multiple tbody tags in a single table would pass HTML validation, it in fact did pass without errors.
Some things to note:
$numCols is your desired number of columns.
Since we are floating items, you may need to set the width and min-width of parent elements and/or add some <br style="clear: both" />, based on your situation.
for alternative sorting methods, see http://php.net/manual/en/array.sorting.php
Here's my full answer:
function sortVertically( $data = array() )
{
/* PREPARE data for printing */
ksort( $data ); // Sort array by key.
$numCols = 4; // Desired number of columns
$numCells = is_array($data) ? count($data) : 1 ;
$numRows = ceil($numCells / $numCols);
$extraCells = $numCells % $numCols; // Store num of tbody's with extra cell
$i = 0; // iterator
$cCell = 0; // num of Cells printed
$output = NULL; // initialize
/* START table printing */
$output .= '<div>';
$output .= '<table>';
foreach( $data as $key => $value )
{
if( $i % $numRows === 0 ) // Start a new tbody
{
if( $i !== 0 ) // Close prev tbody
{
$extraCells--;
if ($extraCells === 0 )
{
$numRows--; // No more tbody's with an extra cell
$extraCells--; // Avoid re-reducing numRows
}
$output .= '</tbody>';
}
$output .= '<tbody style="float: left;">';
$i = 0; // Reset iterator to 0
}
$output .= '<tr>';
$output .= '<th>'.$key.'</th>';
$output .= '<td>'.$value.'</td>';
$output .= '</tr>';
$cCell++; // increase cells printed count
if($cCell == $numCells){ // last cell, close tbody
$output .= '</tbody>';
}
$i++;
}
$output .= '</table>';
$output .= '</div>';
return $output;
}
I hope that this code will be useful to you all.