I need help limiting the number of keywords on my page. I can call the keywords from the database ex. $keywords is available for them. I want to get them for every blog post.
My database table is formatted like this
| id | title | ... | keywords |
|---------------------------------- |
| 1 | title1 | ... | word-t1-1 |
| | | | word-t1-2 |
| | | | word-t1-3 |
| | | | |
| 2 | title2 | ... | word-t2-1 |
| 3 | title3 | ... | word-t3-1 |
| 4 | title4 | ... | word-t4-1 |
I have this code:
<?php
$kw1 = trim($keywords);
$ct1 = explode("\n", $kw1);
$searchkeys = "";
for ($i = 0; $i <= sizeof($ct1); $i++) {
$searchkeys = $searchkeys.''.$ct1[$i].', ';
}
//echo $searchkeys;
?>
The code inside for loop shows the keywords as hyperlink
I want to know how to limit the number of printed keywords while if I define it in the for loop ex.
for ( $i = 0; i < 25; $i++){ somecode; }
Sometimes there aren't 25 keywords,if run the code it prints
keyword1, keyword2,,,,,,,,,,,,,,
My suggestion would be use the min() function like so:
for ( $i = 0; $i < min(count($arr), 25); $i++ ) { // code here }
Related
I am having a problem generating the result I need. I want to sum the other table gg_hp base on gg_id
+--------------+----------+-------+------------+
| sg_name | sg_grade | gg_id | subject_id |
+--------------+----------+-------+------------+
| Quiz 1 | 20 | 14 | 68 |
| Midterm Exam | 50 | 15 | 68 |
| Quiz 2 | 50 | 14 | 68 |
+-------+--------------+----------+-------+----+
tbl_gradesubcateg
+-------+--------------+------------+------------+------------+------------+-------+
| gg_id | categname | percentage | gradecount | teacher_id | subject_id | gg_hp |
+-------+--------------+------------+------------+------------+------------+-------+
| 14 | Quiz | 10 | NULL | 4 | 68 | 0 |
| 15 | Midterm Exam | 20 | NULL | 4 | 68 | 0 |
+-------+--------------+------------+------------+------------+------------+-------+
This is my expected output
+-------+--------------+------------+------------+------------+------------+-------+
| gg_id | categname | percentage | gradecount | teacher_id | subject_id | gg_hp |
+-------+--------------+------------+------------+------------+------------+-------+
| 14 | Quiz | 10 | NULL | 4 | 68 | 70 |
| 15 | Midterm Exam | 20 | NULL | 4 | 68 | 50 |
+-------+--------------+------------+------------+------------+------------+-------+
This is the query I made but.. Im not getting accurate result.
$querycount = "SELECT * FROM tbl_gradesubcateg order by gg_id asc ";
$query_run = mysqli_query($con,$querycount);
$sums= 0;
$ctr = 0;
$id1 = "";
while ($num = mysqli_fetch_assoc ($query_run)) {
$sums += $num['sg_grade'];
$id= $num['gg_id'];
if($id == $id1)
{
$queryhp = mysqli_query($con,"UPDATE tbl_gradecateg SET gg_hp = '".$sums."' where gg_id='".$id."'") or die(mysqli_error($con));
}
else
{
$queryhp = mysqli_query($con,"UPDATE tbl_gradecateg SET gg_hp = '".$sums."' where gg_id='".$id."'") or die(mysqli_error($con));
$sums= 0;
}
$id1= $num['gg_id'];
}
```
Any thoughts would be great.
A correlated subquery is a simple approach:
update tbl_gradesubcateg gs
set sg_grade = (select sum(sg.g_grade)
from gg_hp g
where g.gg_id = gs.gg_id
);
I don't recommend doing this calculation, though. It is simple enough to aggregate when you query the table. Summarizing the results just means that they are out-of-date the next time rows are inserted, updated, or deleted in the tables.
I'd like to select all period of current term (as now FY80) + 3 period only of last term (FY79) from m_period table
Here's the table m_period looks :
+----+------+-------------+--------+
| id | term | period | status |
+----+------+-------------+--------+
| 1 | FY79 | 79::2020/01 | close |
| 2 | FY79 | 79::2020/02 | close |
| 3 | FY79 | 79::2020/03 | close |
| 4 | FY79 | 79::2020/04 | close |
| 5 | FY79 | 79::2020/05 | close |
| 6 | FY79 | 79::2020/06 | close |
| 7 | FY80 | 80::2020/07 | open |
| 8 | FY80 | 80::2020/08 | open |
| 9 | FY80 | 80::2020/09 | open |
| 10 | FY80 | 80::2020/10 | open |
| 11 | FY80 | 80::2020/11 | open |
| 12 | FY80 | 80::2020/12 | open |
| 13 | FY80 | 80::2021/01 | open |
| 14 | FY80 | 80::2021/02 | open |
| 15 | FY80 | 80::2021/03 | open |
| 16 | FY80 | 80::2021/04 | open |
| 17 | FY80 | 80::2021/05 | open |
| 18 | FY80 | 80::2021/06 | open |
+----+------+-------------+--------+
my php script stuck from here :
<?php
function getPeriod()
{
$prev_term = (int)substr($this->session->userdata('term'),2,2) - 1;
$this->db->select('period');
$this->db->where('term', $this->session->userdata('term'));
$this->db->where('term', $prev_term);
$this->db->order_by('period', 'ASC');
return $this->db->get('m_period')->result_array();
}
I've read CI documentation and couldn't find how to use CASE in codeigniter, or there is another way instead of using CASE ?
can someone help me , how to do this ?
Note : I store current term on session
You can use limit() method.
Then, You have to have two separate functions.
function getPrevPeriod()
{
$prev_term = (int)substr($this->session->userdata('term'),2,2) - 1;
$this->db->select('period');
$this->db->where('term', $prev_term);
$this->db->order_by('period', 'ASC');
$this->db->limit(3);
return $this->db->get('m_period')->result_array();
}
function getCurrentPeriod()
{
$this->db->select('period');
$this->db->where('term', $this->session->userdata('term'));
$this->db->order_by('period', 'ASC');
return $this->db->get('m_period')->result_array();
}
Then you can use array_merge() to combine arrays.
$periods = array_merge($prev, $current);
Edit: With one query
function getPeriod()
{
$prev_term = (int)substr($this->session->userdata('term'),2,2) - 1;
$this->db->select('term','period');
$this->db->or_where_in('term',[$this->session->userdata('term'),$prev_term])
$this->db->order_by('period', 'ASC');
$result = $this->db->get('m_period')->result_array();
$output = [];
$n = 0;
foreach($result as $row){
if($row["term"] == $prev_term){
if($n <= 3){
$output[] = $row;
$n++;
}
}else{
$output[] = $row;
}
}
return $output;
}
i have a datastructure similar to this
+---------+---------+
| id | value |
+---------+---------+
| 1 | value |
1 | value |
| 1 | value |
| 1 | value |
| 1 | value |
| 2 | value |
| 2 | value |
| 2 | value |
| 3 | value |
| 3 | value |
| 3 | value |
| | |
+---------+---------+
I am trying to update this table to look something like this
+---------+---------+
| id | value |
+---------+---------+
| 1 | value 0 |
1 | value 1 |
| 1 | value 2 |
| 1 | value 3 |
| 1 | value 4 |
| 2 | value 0 |
| 2 | value 1 |
| 2 | value 2 |
| 3 | value 0 |
| 3 | value 1 |
| 3 | value 2 |
| | |
+---------+---------+
To achieve this, i have written php script that looks like this
$query = "select count(*) as count,id, value from foo group by id";
$sql=$con->prepare($query);
$sql->execute();
$sql->setFetchMode(PDO::FETCH_ASSOC);
while($row=$sql->fetch()){
$id[] = $row['id'];
$count[] = $row['count'];
$value[] = $row['value'];
echo "<pre>";
}
$c=array_combine($id, $count);
foreach ($c as $key=>$value){
for($i=0;$i<=$value;$i++){
$postid = $key;
if($i==0){
$multiple = "multiple";
$newvalue= $value;
}
else{
$x=$i-1;
$multiple = "multiple_".$x;
echo $multiple . "<br>";
$query2 = "update foo set value = :multiple";
$sql2=$con->prepare($query2);
$sql2->bindValue(':multiple', $multiple);
$sql2->execute();
}
}
}
The problem is that the code returns the following results
+---------+---------+
| id | value |
+---------+---------+
| 1 | value_1 |
1 | value_1 |
| 1 | value_1 |
| 1 | value_1 |
| 1 | value_1 |
| 2 | value_1 |
| 2 | value_1 |
| 2 | value_1 |
| 3 | value_1 |
| 3 | value_1 |
| 3 | value_1 |
| | |
+---------+---------+
What can i be possibly be doing wrong?
Thanks #Shadow
Your query runs fine but returns the following results
+------+-----------------------------------------------+
| id | value |
+------+-----------------------------------------------+
| 1 | multiple_1_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0 |
| 1 | multiple_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1 |
| 1 | multiple_1_2_2_2_2_2_2_2_2_2_2_2_2_2_2_2_2 |
| 1 | multiple_1_3_3_3_3_3_3_3_3_3_3_3_3_3_3_3_3 |
| 2 | multiple_1_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0 |
| 2 | multiple_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1 |
| 2 | multiple_1_2_2_2_2_2_2_2_2_2_2_2_2_2_2_2_2 |
| 2 | multiple_1_3_3_3_3_3_3_3_3_3_3_3_3_3_3_3_3 |
| 3 | multiple_1_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0 |
| 3 | multiple_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1 |
| 3 | multiple_1_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0 |
+------+-----------------------------------------------+
You can do the update iterating and creating data in such a way:
<?php
$pdo = new PDO('mysql:host=localhost;dbname=test', 'root', '');
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sth = $pdo->prepare("SELECT * FROM foo");
$sth->execute();
$data = $sth->fetchAll(PDO::FETCH_ASSOC);
$response = array();
foreach ($data as $dataIndex => $dataValue) {
if (!isset($response[$dataValue["id"]]["count"])) {
$response[$dataValue["id"]]["count"] = 0;
} else {
$response[$dataValue["id"]]["count"] ++;
}
$response[$dataValue["id"]]["values"][$dataValue["pid"]] = "value_" . $response[$dataValue["id"]]["count"];
$sth = $pdo->prepare("UPDATE foo SET value = '{$response[$dataValue["id"]]["values"][$dataValue["pid"]]}' WHERE pid = {$dataValue["pid"]}");
$sth->execute();
}
?>
But try to do an update using the least iteration not to create as many database queries , example:
<?php
$pdo = new PDO('mysql:host=localhost;dbname=test', 'root', '');
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$sth = $pdo->prepare("SELECT * FROM foo");
$sth->execute();
$data = $sth->fetchAll(PDO::FETCH_ASSOC);
$response = array();
$update = array();
foreach ($data as $dataIndex => $dataValue) {
$response[$dataValue["id"]]["id"] = $dataValue["id"];
if (!isset($response[$dataValue["id"]]["count"])) {
$response[$dataValue["id"]]["count"] = 0;
} else {
$response[$dataValue["id"]]["count"] ++;
}
$response[$dataValue["id"]]["values"][$dataValue["pid"]] = "value_" . $response[$dataValue["id"]]["count"];
$update[] = "UPDATE foo SET value = '{$response[$dataValue["id"]]["values"][$dataValue["pid"]]}' WHERE pid = {$dataValue["pid"]};";
}
$update = implode("",$update);
$sth = $pdo->prepare($update);
$sth->execute();
?>
Your update query
$query2 = "update foo set value = :multiple";
does not contain any where criteria, each time you call this query it updates the value field's value in all records.
Honestly, I would not really involve php in this update, would do it purely in sql using user defined variables and multi-table join syntax in the update:
update foo inner join (select #i:=0, #previd:=-1) as a
set foo.value=concat(foo.value,'_',#i:=if(id=#previd,#i+1,0),if(#previd:=id,'',''))
The subquery in the inner join initialises #i and #previd user defined variables. The 3rd parameter of the concat function determines the value #i to be concatenated to the value field. The 4th parameter of concat sets the #previd variable and returns an empty string not to affect the overall concatenation. Unfortunately, I do not have access to MySQL to test the query, but it should be a good starting point anyway.
UPDATE
The OP claims in the updated question that the query I provided creates the below resultset:
+------+-----------------------------------------------+
| id | value |
+------+-----------------------------------------------+
| 1 | multiple_1_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0 |
| 1 | multiple_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1 |
| 1 | multiple_1_2_2_2_2_2_2_2_2_2_2_2_2_2_2_2_2 |
| 1 | multiple_1_3_3_3_3_3_3_3_3_3_3_3_3_3_3_3_3 |
| 2 | multiple_1_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0 |
| 2 | multiple_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1 |
| 2 | multiple_1_2_2_2_2_2_2_2_2_2_2_2_2_2_2_2_2 |
| 2 | multiple_1_3_3_3_3_3_3_3_3_3_3_3_3_3_3_3_3 |
| 3 | multiple_1_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0 |
| 3 | multiple_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1_1 |
| 3 | multiple_1_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0_0 |
+------+-----------------------------------------------+
Tested my solution in sqlfiddle. I had to remove the order by clause, otherwise the query produced the results in line with the requirements stated in the question. See sqlfiddle for details.
The results in the updated question are likely the result of running the query in a loop multiple times. In simple words: you just copy pasted the query into your code and did not remove the loop, even when I pointed out, that this may be the reason of the results you received.
I want the queqe id auto increase start from 1
I have an mysql table call t1
mysql table t1 Data as below:
+----------+------------------+-------------+
| ID | Name | Status |
+----------+------------------+-------------+
| 1 | ABBCCC | 1 |
| 2 | BASDASD | 1 |
| 3 | ABBCCC | 1 |
| 4 | ABBCCC | 2 |
+-------------------------------------------+
I loop data in php like this:
$quserCA = DB::query("SELECT * FROM ".DB::table('jnbook_book')." WHERE Name = 'ABBCCC' ORDER BY id DESC LIMIT 20");
$nqCA = mysql_num_rows($quserCA);
while($ruserCA = DB::fetch($quserCA)){
$CAlist[] = $ruserCA;
}
$x = 1;
while($x <= $nqCA) {
//echo "The number is: $x <br>";
$x++;
}
I loop this in my htm like this:
<table>
<tr>
<td>Queqe ID</td><td>ID</td><td>Status</td>
</tr>
<!--{loop $CAlist $value}-->
<tr>
<td>{$x}</td><td>{$value[id]}</td><td>{$value[status]}</td>
</tr>
<!--{/loop}-->
</table>
But after that my table output as below show
+---------------+-------------------+----------------+
| Queqe ID | ID | Status |
+---------------+-------------------+----------------+
| 1 | 1 | 1 |
| 1 | 3 | 1 |
| 1 | 4 | 2 |
+----------------------------------------------------+
Actually what I want the table output as below
(I want the queqe id auto increase start from 1):
+----------+-----------------+-----------------+
| Queqe ID | ID | Status |
+----------+-----------------+-----------------+
| 1 | 1 | 1 |
| 2 | 3 | 1 |
| 3 | 4 | 2 |
+----------------------------------------------+
Thank you.
This should be done something like:
$x = 1;
while($ruserCA = DB::fetch($quserCA)){
// add a field, say `x` with number of a record:
$ruserCA['x'] = $x++;
$CAlist[] = $ruserCA;
}
In a template:
<td>{$value[x]}</td><td>{$value[id]}</td><td>{$value[status]}</td>
I am creating game which uses MySQL database to create "playing field".
In my MySQL table I have two columns pointX and pointY, both INT. I could also use POINT, but in my case these two columns are better solution.
| id | pointX | pointY | player | game |
|----|--------|--------|--------|------|
| 1 | -2 | 1 | 7 | 10 |
| 2 | -3 | 2 | 5 | 10 |
| 3 | 2 | -2 | 2 | 10 |
| 4 | -2 | -1 | 1 | 10 |
I should produce HTML table from this MySQL table. Something like this, but with no coordinateheaders (below those are only for easier understanding):
|-----|----|----|----|----|----|----|
| Y/X | -3 | -2 | -1 | 0 | 1 | 2 |
|-----|----|----|----|----|----|----|
| -2 | | | | | | 2 |
|-----|----|----|----|----|----|----|
| -1 | | 1 | | | | |
|-----|----|----|----|----|----|----|
| 0 | | | | | | |
|-----|----|----|----|----|----|----|
| 1 | | 7 | | | | |
|-----|----|----|----|----|----|----|
| 2 | 5 | | | | | |
|-----|----|----|----|----|----|----|
Plus.. every <td> should have attribute data-cell, which includes coordinates, as example data-cell="-2x-1".
What is the best way to get started?
$rng = $dbh->prepare('
SELECT MIN(pointX) AS minX, MIN(pointY) AS minY,
MAX(pointX) AS maxX, MAX(pointY) AS maxY
FROM field
WHERE game = ?
LOCK IN SHARE MODE
');
$qry = $dbh->prepare('
SELECT pointX, pointY, player
FROM field
WHERE game = ?
ORDER BY pointX, pointY
');
$dbh->beginTransaction();
$rng->execute([$game_id]);
$qry->execute([$game_id]);
$dbh->rollBack();
$limits = $rng->fetch();
$player = $qry->fetch();
echo '<table>';
for ($y = $limits['minY']; $y <= $limits['maxY']; $y++) {
echo '<tr>';
for ($x = $limits['minX']; $x <= $limits['maxX']; $x++) {
printf('<td data-cell="%dx%+dy">', $x, $y);
if ($player and $player['pointX'] == $x and $player['pointY'] == $y) {
echo htmlentities($player['player']);
$player = $qry->fetch();
} else {
echo ' ';
}
echo '</td>';
}
echo '</tr>';
}
echo '</table>';
It looks like you are already off to a good start. Assuming the number of cells for X and Y as $xcells and $ycells, the next step I would take is to build your table like so:
echo "<table>";
for ($i = -3; $i < $ycells; i++) {
echo "<tr>";
for ($j = -3; $j < $xcells; j++) {
echo "<td data-cell='" . $i . "y" . $j . "x'>";
}
echo "</tr>";
}
echo "</table>";