Ok, I've created a simple page that allows me to calculate customer satisfaction for the leaders who work in my store. Basically, I have a mysql database that contains the names of all the leaders who work there, along with the dates and time that they work. I also have a database that contains the dates, and times of a customers visit and the rating that they gave their visit.
I've created a query that behaves in such that when I query a leader's name, it returns all of the ratings/scores that were submitted by customers on the dates and times that specific leader was working.
Customers usually rate their experiences from 1 - 10 with 10 being the best. I wanted to transform those scored responses to a simple lettered system where a score of 9-10 would equal "G" for Good, 7-8 would equal "O" for ok and anything below 6 would equal "B" for bad.
Using mysqli_fetch_array and a switch statement, I tried to convert the numbers to the letters. However, I don't seem to be getting any results from this. I've tested the query and the fetch_array and if I use them by themselves (without the switch statement), they produce the correct scored responses (ie. Paul's score 10, 9, 9). But when I insert the switch statement, they do not convert to letters and nothing appears on the screen. Question: Is there something wrong with the way i'm using this switch statement or mysqli_fetch_array. I'm very new to coding so I may have a misunderstanding of the way these are used.
here's the php
<html>
<body>
<?php
include("db.php");
echo $_POST['searched']; // temp. check to see if post came through
echo '<br>';
$searched = $_POST["searched"]; // create variable to put searched name in query.
$good = array(); //create array to store good scores
$ok = array(); //create array to store ok scores
$bad = array(); //create array to store bad scores
// Search the database and retrieve all ratings That matches a managers name
$query = "SELECT leaders.name, responses.score
FROM leaders
INNER JOIN responses
ON leaders.shift_date = responses.visit_date
AND leaders.shift_time = responses.visit_time
AND leaders.name = '$searched' ORDER BY leaders.id;";
$result = $db->query($query); //store that query
//iterate through result and grab each score
while ($row = $result->fetch_array()){ // place scores into an array
// use a switch statement to change numbered system to lettered
switch($row[1]) {
case 10:
case 9:
array_push($good, "G");
break;
//echo $row[1] . ' '; temp check to ensure array call was successful
echo $good[0] . ' ';
}
}
//echo "<script>window.location = 'http://localhost/~baronjon/ilotf/main.php'</script>";
?>
</body>
</html>
You have to switch on a specific field of the array and not the whole array.
Try this
//iterate through result and grab each score
while ($row = $result->fetch_array()){ // place scores into an array
// use a switch statement to change numbered system to lettered
switch($row['score']) {
case 10:
case 9:
array_push($good, $row);
break;
case 8:
case 7:
array_push($ok, $row);
break;
default:
array_push($bad, $row);
} // endswitch
}
print_r( $good );
print_r( $ok );
print_r( $bad );
Now you have the 3 new arrays each containing the result rows that fall into the 3 categories.
PS Dont use row[0] syntax, because as soon as you change your select statement and add another field to the front of the field list you will be testing the wrong field in your switch.
Related
I have a query like this:
$sql = "SELECT * FROM doctors WHERE city ='$city' LIMIT 10 ";
$result = $db->query($sql);
And I show the result like this :
while($row = $result->fetch_object()){
echo $row->city;
}
The Problem :
Mysql , will search through my database to find 10 rows which their city field is similar to $city.
so far it is OK;
But I want to know what is the exact row_number of the last result , which mysql selected and I echoed it ?
( I mean , consider with that query , Mysql selected 10 rows in my database
where row number are:
FIRST = 1
Second = 5
Third = 6
Forth = 7
Fifth = 40
Sixth = 41
Seventh = 42
Eitghth = 100
Ninth = 110
AND **last one = 111**
OK?
I want to know where is place of this "last one"????
)
MySQL databases do not have "row numbers". Rows in the database do not have an inherent order and thereby no "row number". If you select 10 rows from the database, then the last row's "number" is 10. If each row has a field with a primary id, then use that field as its "absolute row number".
You could let the loop run and track values. When the loop ends, you will have the last value. Like so:
while($row = $result->fetch_object()){
echo $row->city;
$last_city = $row->city;
}
/* use $last_city; */
To get the row number in the Original Table of the last resultant (here, tenth) row, you could save the data from the tenth row and then, do the following:
1. Read whole table
2. Loop through the records, checking them against the saved data
3. Break loop as soon as data found.
Like So:
while($row = $result->fetch_object()){
echo $row->city;
$last_row = $row;
}
Now, rerun the query without filters:
$sql = "SELECT * FROM doctors";
$result = $db->query($sql);
$rowNumber = 0;
while($row = $result->fetch_object()) {
if($row == $last_row) break;
$rowNumber++;
}
/* use $rowNumber */
Hope this helps.
What you can do is $last = $row->id; (or whatever field you want) inside your while loop - it will keep getting reassigned with the end result being that it contains the value of the last row.
You could do something like this:
$rowIndex = 0;
$rowCount = mysqli_num_rows($result);
You'd be starting a counter at zero and detecting the total number of records retrieved.
Then, as you step through the records, you could increment your counter.
while ( $row = $result->fetch_object() ) {
$rowIndex++;
[other code]
}
Inside the While Loop, you could check to see whether the rowIndex is equal to the rowCount, as in...
if ($rowIndex == $rowCount) {
[your code]
}
I know this is a year+ late, but I completely why Andy was asking his question. I frequently need to know this information. For instance, let's say you're using PHP to echo results in a nice HTML format. Obviously, you wouldn't need to know the record result index in the case of simply starting and ending a div, because you could start the div before the loop, and close it at the end. However, knowing where you are in the result set might affect some styling decisions (e.g., adding particular classes to the first and/or last rows).
I had one case in which I used a GROUP BY query and inserted each set of records into its own tabbed card. A user could click the tabs to display each set. I wanted to know when I was building the last tab, so that I could designate it as being selected (i.e., the one with the focus). The tab was already built by the time the loop ended, so I needed to know while inside of the loop (which was more efficient than using JavaScript to change the tab's properties after the fact).
As my info states, I inherited the job of statistician for a local dart league. (Woohoo $20 a season)
I would love to implement an ELO rating system.
The current database table has over 100,000 entries.
There are 3 different games that are played. Singles, Doubles, and Team.
The originator of the database has the games entered as such:
Index Player1_num Player2_num Opp_Player1_num Odd_Player2_num H_team V_team Season Week W L Game_type
A singles game is entered twice.
values(1,20,null,30,null,200,300,11,2,1,0,301_singles)
and
values(2,30,null,20,null,200,300,11,2,0,1,301_singles)
It was done this way to facilitate easier look-ups of individuals.
A doubles game would have values such as
(3,20,21,30,31,200,300,11,2,1,0,501_doubles)
(4,21,20,30,31,200,300,11,2,1,0,501_doubles)
(5,30,31,20,21,200,300,11,2,0,1,501_doubles)
(6,31,30,20,21,200,300,11,2,0,1,501_doubles)
There again, it is built for easier queries for looking up wins and losses across seasons and with different partners.
A team game is:
(7,null,null,null,null,200,300,11,2,1,0,team_game)
So I added a match_num column to the table to help lump the games under 1 number.
However, I am unsure how best to assign the numbers, understandably, I don't feel like going through all 90k entries by hand.
Note: The early seasons were modified by hand and not all double matches have 4 entries (some only have 1). Some matches may be out of order as well (Instead of indexes: 1,2 they could be 1,9).
I don't know if you need more info for this, and I am unsure of how to post larger examples of the table.
Current code:
<body>
<?php
include "inc.php";
// Select Max Match Number
$sqlMatch="select max(match_num) from stats_results";
$match =mysql_query($sqlMatch);
$m= $match ? mysql_result($match,0):mysql_error();
$matchno= $m+1; // First Match number
$game=array("'301_singles'","'cricket_singles'","'501_singles'","'301_doubles'","'cricket_doubles'");
// selects max season
$sqlSeason="select max(season_index) from stats_season";
$season =mysql_query($sqlSeason);
$smax= $season ? mysql_result($season,0):mysql_error();
# $smax=2;
// for each season up to max season
for($s=1;$s<=$smax;$s++)
{
// Selects max week within the current season
$sqlWeek="select max(week) from stats_results where season=$s ";
$Week =mysql_query($sqlWeek);
$wmax= $Week ? mysql_result($Week,0):mysql_error();
# $wmax=2;
// for each week within current season up to the max week
for ($w=1;$w<=$wmax;$w++)
{
// each singles game
foreach($game as $g)
{
###########################################################################################################
$result = mysql_query("SELECT * FROM stats_results where season=$s and week=$w and game_code=$g ;") or die(mysql_error());
// Put them in array
for($i = 0; $rows[$i] = mysql_fetch_assoc($result); $i++) ;
// Delete last empty one
array_pop($rows);
//******************************************************
$matches=array();
foreach($rows as $record)
{
// Get a unique match code for this match
$matchid= getMatchID($record);
// Have we seen this ID before? If yes add this record index to the existing array
// otherwise create an array with just this value
if (!isset($matches[$matchid])) $matches[$matchid]= array($record['index_results']); // No
else $matches[$matchid][]= $record['index_results']; // Yes, add this Index
}
// Now $matches is an array of arrays of Index values, grouped by "match" so...
/* Sort $matches by key (see getMatchID for why!) */
ksort($matches);
// Update the table
foreach($matches as $match)
{
// Create SQL instruction to set the match_num for all the Index values in each entry
$sql= "UPDATE stats_results SET match_num = $matchno WHERE index_results IN (".implode(",", $match).")";
echo "<br>";
echo $sql;
/* Execute the SQL using your chosen method! */
// Move the match count on
$matchno++;
}
// End our loops
}
}
}
function getMatchID($gamerecord)
{
$index= "{$gamerecord['season']}-{$gamerecord['week']}-{$gamerecord['game_code']}-";
$players= array(
$gamerecord['player1_num'],
empty($gamerecord['player2_num'])?0:$gamerecord['player2_num'],
$gamerecord['opp_player1_num'],
empty($gamerecord['opp_player2_num'])?0:$gamerecord['opp_player2_num']
);
// Sort the players to get them in a consistent order
sort($players);
// Add the sorted players to the index
$index.= implode('-', $players);
return $index;
}
?>
</body>
(I'm putting this into an Answer so I can get it to layout a bit better - but it's not really a "solution" as such!)
I think what I'd do is try and build an array of arrays of Index values grouped by game - you can then use that to create SQL to update the table.
So, if $rows is an array of all records we'd do something like the following pseudo-code:
$matches= array();
foreach($rows as $record)
{
// Get a unique match code for this match
$matchid= getMatchID($record);
// Have we seen this ID before? If yes add this record index to the existing array
// otherwise create an array with just this value
if (!isset($matches[$matchid])) $matches[$matchid]= array($record['Index']); // No
else $matches[$matchid][]= $record['Index']; // Yes, add this Index
}
// Now $matches is an array of arrays of Index values, grouped by "match" so...
/* Sort $matches by key (see getMatchID for why!) */
ksort($matches);
// Update the table
$matchno= 1; // First Match number
foreach($matches as $match)
{
// Create SQL instruction to set the match_num for all the Index values in each entry
$sql= "UPDATE games SET match_num = $matchno WHERE Index IN (".implode(",", $match).")";
/* Execute the SQL using your chosen method! */
// Move the match count on
$matchno++;
}
So all that leaves is the getMatchID function - if we give each match a temporary ID based on it's season, week and a sorted list of it's participants (and use the Season and Week first) that should be unique for each game and we can sort by this index later to get the games in the right order. So again in rough pseudo-code, something like:
function getMatchID($gamerecord)
{
$index= "{$gamerecord['Season']}-{$gamerecord['Week']}-{$gamerecord['H_Team']}-{$gamerecord['V_Team']}-";
$players= array(
empty($gamerecord['Player1_Num'])?0:$gamerecord['Player1_Num'],
empty($gamerecord['Player2_Num'])?0:$gamerecord['Player2_Num'],
empty($gamerecord['Opp_Player1_Num'])?0:$gamerecord['Opp_Player1_Num'],
empty($gamerecord['Opp_Player2_Num'])?0:$gamerecord['Opp_Player2_Num']
);
// Sort the players to get them in a consistent order
sort($players);
// Add the sorted players to the index
$index.= implode('-', $players);
return $index;
}
So all being well $index would come back with something like 11-2-200-300-0-0-20-30 for the first singles match in your example - no matter which of the game records we were looking at.
Does that make sense/help at all?
I'm trying incorporate a "News Feed" into my site, pulling information from two different tables (Using two seperate queries). One feed pulls current stories "$newsfeed" and the other pulls history stories "$historyfeed". Both tables need to remain seperate. I'm attempting to place these queries in a random order for a set number or rows. For example, I want 5 stories listed, with history and news choosen randomly.
The order might be: History, News, History, History, History
the next visit might produce: News, News, New, History, News
This part seems to work fine...
However, I've been unable to move to the next row in the query. So five of the exact same news stories are produced, instead of moving to the next row of the query. See the example code below:
//DB connection established earlier
$newsfeed = mysql_query("SELECT * FROM newsfeed WHERE story_type='business'"); //News Story Query
$row_newsfeed = mysql_fetch_assoc($newsfeed);
$historyfeed = mysql_query("SELECT * FROM newsfeed WHERE story_type='business'"); //History Story Query
$row_historyfeed = mysql_fetch_assoc($historyfeed);
$storycount = 0;
while ($storycount < 5) {
$storytype = rand(1,2); //randomly select next story type
switch ($storytype){
case: "1" //if next story is a new story
storybubble($row_newsfeed); //function to echo newsfeed content
$storycount++;
break;
case: "2" //if next story is a history story
storybubble($row_historyfeed); //function to echo historyfeed content
$storycount++;
break;
default:
echo "Error";
} //switch statement
} //story count while statement
You create the variables at the top, and load stories into $historyfeed and $newsfeed; but you keep using the same variables in your loop. This should work a little better:
case: "1" //if next story is a new story
$row_newsfeed = mysql_fetch_assoc($newsfeed);
storybubble($row_newsfeed); //function to echo newsfeed content
$storycount++;
break;
case: "2" //if next story is a history story
$row_historyfeed = mysql_fetch_assoc($historyfeed);
storybubble($row_historyfeed); //function to echo historyfeed content
$storycount++;
It's populating the variables when they're needed, instead of at the start of the code.
mysql_fetch_assoc() returns one row of the result.
If you want to return the next row you need to call mysql_fetch_assoc() again.
So you could change your calls to storybubble to:
storybubble(mysql_fetch_assoc($row_newsfeed));
However, you'll probably be better off to build an array of the rows and then pull from that.
$newsfeed = array();
$historyfeed = array();
while($row = mysql_fetch_assoc($newsfeed)) {
$newsfeed[] = $row;
}
while($row = mysql_fetch_assoc($historyfeed)) {
$historyfeed[] = $row;
}
...
switch($storytype) {
case 1:
storybubble(array_shift($newsfeed));
break;
}
...
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 table in phpmyadmin that stores an 'id' (auto inc), 'title' and a 'date'.
I have a webpage where I display the 10 latest items (I simply order by ID).
On that page I print the title and the date. My wish is to also display the number of the posted item, so the first posted item is 1, the second is 2, etc. I cannot simply print the ID from the database because if I delete a row, the numbers aren't straight anymore.
My idea was to put all the data in an array but I have no clue what the best way to do this is and how I could print that item number. So for example when I want to display the 54th item I can easily print $items[54][id] or something and it will show me the number 54 and to display the title I print $items[54][title].
I don't know if there are simpler methods, plus arrays always start at 0, but my items must start at 1.
Besides this page that shows the 10 latest items, there is another page where it gets the title of the item out of the URL. How will I be able to search the title in the array and display the data the same way but only for that requested title?
Thanks in advance!
"SELECT COUNT(id) as cnt FROM mytable";
you can select the count of all database entries.
and then assign it to your iterator
$i = $row['cnt']; // this will hold the ammount of records e.g. 21
// other query
while($row = mysql_fetch_assoc($result)) {
echo $i;
$i--; // this will decrement on every iteration 21, 20 , 19, and so on.
}
First off. I would add a timestamp field to the database and order by that instead as it feels overall more reliable and gives you additional details which may prove handy later.
To create the multidimensional array I would do something like:
$result = mysql_query(...);
$items = array();
while($item = mysql_fetch_assoc($result)) {
$items[] = $item;
}
Now $items[12] for example would give you item number 13 (since it's 0-indexed).
Lastly, to select only the item with a specific title I would use a query which included a WHERE clause, like
"SELECT ... FROM ... WHERE title = '".$title."'"
It's very important to sanitize this variable before using it in the query though.
You can read more about MySQL on a lot of places. A quick googling gave me this: http://www.tutorialspoint.com/mysql/index.htm
You should learn PHP before starting to program in PHP ;) Read and work through the PHP manual and some tutorials!
As to your question it is a simple loop you want to do. One way of doing it as an example.
Fetch the 10 last items from the database in any way you like, following some code, partly pseudo-code.
$markup = '';
for ($i=1; $i<=count($items); $i++)
{
$markup .= 'Item ' . $i . ': ' . $items['date'] . ' - ' . $items['title'];
$markup .= 'read more';
$markup .= PHP_EOL;
}
echo $markup;
I don't know how you print out your data exactly, but I assume there is a loop in there. Simply set a counter that increments by one at every row and print its value.
As for the title search, you'll have to run another query with a WHERE title = '$title' condition, but beware of SQL injection.