retrieve and add the data into database - php

I need to retrieve the relevant data from database, and add to the attendance table again. this code shows many error. actually i dunno how to use the array to add the data. can anyone help?? thankssssssssssss.
<?php
$sql = "select p_module_ID, student_ID,
p_attendance_Date, p_attendance_Time,
p_attendance_Status,p_attendance_reason
from attendance";
$result = mysqli_query($con, $sql);
if(!$result)
{
echo mysqli_error($con);
exit();
}
while($rows = mysqli_fetch_array($result))
{
$attendance_list[] = array('p_module_ID' => $rows['p_module_ID'],
'student_ID' => $rows['student_ID'],
'p_attendance_Date' => $rows['p_attendance_Date'],
'p_attendance_Time' => $rows['p_attendance_Time'],
'p_attendance_Status' => $rows['p_attendance_Status'],
'p_attendance_reason' => $rows['p_attendance_reason']);
}
?>
<html>
<body>
<form action="attendance.php" method="post" accept-charset='UTF-8'>
<table border="0" cellspacing="20" >
<tr>
<td>
<select name="p_module_ID">
<?php
$sql = "SELECT p_module_ID FROM schedule";
$result = $con->query($sql);
while($row = mysqli_fetch_assoc($result)) {
echo "<option>".$row['p_module_ID']."</option>";
}
?>
</select>
</td>
</tr>
<tr>
<td>
<select name="p_attendance_Date" >
<?php
$sql = "SELECT p_StartDate FROM schedule";
$result = $con->query($sql);
while($row = mysqli_fetch_assoc($result)) {
echo "<option>".$row['p_StartDate']."</option>";
}
?>
</select>
</td>
</tr>
<tr>
<td>
<select name="p_attendance_Time">
<?php
$sql = "SELECT p_Time FROM schedule";
$result = $con->query($sql);
while($row = mysqli_fetch_assoc($result)) {
echo "<option>".$row['p_Time']."</option>";
}
?>
</select>
</td>
</tr>
<table id="t01">
<tr>
<th> Student ID </th>
<th> Name </th>
<th> Attendance </th>
<th> Reason </th>
<?php foreach($attendance_list as $attend) : ?>
<tr>
<td>
<?php
$sql = "SELECT p.student_ID,CONCAT(s.student_fname, ' ', s.student_lname) AS fullname FROM Pals p JOIN student s ON p.student_ID = s.student_ID WHERE student_role = 'Student' GROUP BY student_ID";
$result = $con->query($sql);
while($row = mysqli_fetch_assoc($result)) {
echo $attend[$row['student_id']];
}
?>
</td>
<td>
<?php
$sql = "SELECT p.student_ID,CONCAT(s.student_fname, ' ', s.student_lname) AS Fullname FROM Pals p JOIN student s ON p.student_ID = s.student_ID WHERE student_role = 'Student' GROUP BY student_ID";
$result = $con->query($sql);
while($row = mysqli_fetch_assoc($result)) {
echo $attend['Fullname'];
}
?>
</td>
<td>
<?php echo $attend["p_attendance_Status"]; ?>
</td>
<td>
<?php echo $attend["p_attendance_reason"]; ?>
</td>
</tr>
</tr>
<?php endforeach; ?>
</table>
</table>
</form>
</body>
</html>


Use $row['student_Id'] instead of $row['student_id']. Same as for Fullname. You selecting AS fullname not AS Fullname. Listen to the case sensitiveness.

Related

Add profile avatar to the leaderboard

I recently made a leaderboard and I would like to make some changes.
This is the code :
<table>
<tr>
<td></td>
<td>Name</td>
<td>Likes</td>
</tr>
<?php
$con=mysqli_connect("localhost", "user", "pass", "database");
$sql = ("SELECT username, likes FROM users ORDER BY likes DESC LIMIT 5");
$result = mysqli_query($con, $sql);
$rank = 1;
if (mysqli_num_rows($result)) {
while ($row = mysqli_fetch_assoc($result)) {
echo "<tr>
<td>{$rank}</td>
<td>{$row['username']}</td>
<td>{$row['likes']}</td>
</tr>";
$rank++;
}
}
?>
</table>
Now, what I would like to do is add instead of 'username' the avatar of each user with 'alt' for username. E.g :
<img src="<?php echo $example->avater;?>" alt="<?php echo $example->username;?>" />
This is the location of avatar in mysql !
I also have a css code created for the avatar to appear in a round circle.That means we will use
<div class="pro_usrs_container">
I tried but I don't understand how to make the codes so that I can integrate them in <td> instead of <td> $ row ['username'] </td>
Thank you very much !

Select avater in your Query and use it in your table.
<table>
<tr>
<td></td>
<td>Name</td>
<td>Likes</td>
</tr>
<?php
$con=mysqli_connect("localhost", "user", "pass", "database");
$sql = ("SELECT username, avater, likes FROM users ORDER BY likes DESC LIMIT 5");
$result = mysqli_query($con, $sql);
$rank = 1;
if (mysqli_num_rows($result)) :
while ($row = mysqli_fetch_assoc($result)) : ?>
<tr>
<td><?php echo $rank; ?></td>
<td><img src="<?php echo $row['avater'];?>" alt="<?php echo $row['avater'];?>" /></td>
<td><?php echo $row['likes']; ?></td>
</tr>
<?php $rank++;
endwhile;
endif;
?>
</table>

Based on the requirement above:
<table>
<tr>
<td></td>
<td>Name</td>
<td>Likes</td>
</tr>
<?php
$con=mysqli_connect("localhost", "user", "pass", "database");
$sql = ("SELECT avater, username, likes FROM users ORDER BY likes DESC LIMIT 5");
$result = mysqli_query($con, $sql);
$rank = 1;
if (mysqli_num_rows($result)) {
while ($row = mysqli_fetch_assoc($result)) {
echo "<tr>
<td>{$rank}</td>
<td><img src="{$row['avater']}" alt="{$row['username']}" /></td>
<td>{$row['likes']}</td>
</tr>";
$rank++;
}
}
?>

TWO MySQL commands (SELECT to View), but only one is showing output

I have a table and each , I want to select a data from the same table in my database.
For example, first <td> is first name, then the second <td> is phone number.
I got the command, but only the first command is showing output.
This is my php codes to open and connect to the database :
<?php
include("./inc/db_connect.php");
$conn = OpenCon();
?>
This is the php codes for the table including <th> and <td> :
<div class="layer55">
<h3>
<table class="flat-table">
<tbody>
<tr>
<th>
<?php
$sql = "SELECT * FROM sharp_emp WHERE employee_id = 'AA170336'";
if ($result = $conn->query($sql)) {
if ($result->num_rows > 0) {
echo "Name";
}
}
?>
</th>
<th>
<?php
$sql = "SELECT * FROM sharp_emp WHERE employee_id = 'AA170336'";
if ($result = $conn->query($sql)) {
if ($result->num_rows > 0) {
echo "Phone Number";
}
}
?>
</th>
</tr>
<tr>
<td>
<?php
$sql = "SELECT first_name FROM sharp_emp WHERE employee_id = 'AA170336'";
while ($row = $result->fetch_array()) {
echo "" . $row['first_name'] . "";
}
?>
</td>
<td>
<?php
$sql = "SELECT phone FROM sharp_emp WHERE employee_id = 'AA170336'";
while ($row = $result->fetch_array()) {
echo "" . $row['phone'] . "";
}
?>
</td>
</tr>
</tbody>
</table>
</h3>
</div>
This is the php codes for db_connect.php :
<?php
function OpenCon()
{
$dbhost = "localhost";
$dbuser = // Hidden;
$dbpass = // Hidden;
$db = "sharp_db";
$conn = new mysqli($dbhost, $dbuser, $dbpass,$db) or die("Connect failed: %s\n". $conn -> error);
return $conn;
}
function CloseCon($conn)
{
$conn -> close();
}
?>
The expected output :
|----------|----------|
|Name |Phone Number|
|----------|----------|
|John |179898765 |
The current output :
|----------|----------|
|Name |Phone Number|
|----------|----------|
|John |Null (empty) |

You are running the same query multiple times, overwriting the $result variable for no reason, having useless $sql for the later 2 fetch without using them, and fetching a single $result twice by mistake.
So there are multiple concept problem with your code. I think your current code is something equivalant to this:
<div class="layer55">
<h3>
<table class="flat-table">
<tbody>
<tr>
<?php
$sql = "SELECT * FROM sharp_emp WHERE employee_id = 'AA170336'";
if ($result = $conn->query($sql)) {
if ($result->num_rows > 0) {
?>
<th>Name</th>
<th>Phone Number</th>
<?php } else { ?>
<th></th>
<th></th>
<?php } ?>
<?php } ?>
</tr>
<tr>
<?php if ($row = $result->fetch_array()) { ?>
<td><?php echo "" . $row['first_name'] . ""; ?></td>
<td><?php echo "" . $row['phone'] . ""; ?></td>
<?php } else { ?>
<td></td>
<td></td>
<?php } ?>
</tr>
</tbody>
</table>
</h3>
</div>
But frankly, it makes no sense to me to print an empty table when there is no result. So what you need is probably something like this.
<?php
$sql = "SELECT * FROM sharp_emp WHERE employee_id = 'AA170336'";
if (
($result = $conn->query($sql))
&& ($result->num_rows > 0)
&& ($row = $result->fetch_array())
):
?>
<div class="layer55">
<h3>
<table class="flat-table">
<tbody>
<tr>
<th>Name</th>
<th>Phone Number</th>
</tr>
<tr>
<td><?php echo $row['first_name']; ?></td>
<td><?php echo $row['phone']; ?></td>
</tr>
</tbody>
</table>
</h3>
</div>
<?php endif; ?>

PHP Mysql query optimization for report

I have this report which filters data from 5 tables but it is very slow takes around 10 seconds. I tried using index on some columns but it did not help.
Basically the first query is the master and the others are for filtering it if the other queries condition met then it will skip it.
this is the script:
<div class="col-md-12">
<h3>List of Outstandings</h3>
<table class="table table-condensed table-bordered table-hover small">
<thead>
<tr>
<th >#</th>
<th>PR #</th>
<th>PR Type</th>
<th>Description</th>
<th>Dep.</th>
<th>Date</th>
<th>Requester</th>
<th>Assigned to</th>
</tr>
</thead>
<tbody>
<?php
$chkk = 0;
$sql = "SELECT * FROM msr WHERE Status ='Approved' ";
$result6 = $connn->query($sql);
if ($result6->num_rows > 0) {
$vo = 1;
while ($row0 = $result6->fetch_assoc()) {
$chkk = 0;
$MSRID = $row0["MSRID"];
$MSRType = $row0["MSRType"];
$result4 = "SELECT owner FROM tracking WHERE MSRID='$MSRID' ";
$MyRow4 = $connn->query($result4);
$row4 = $MyRow4->fetch_assoc();
$actionBy = $row4["owner"];
$resultusr = "SELECT RFQID FROM rfq WHERE MSRID='$MSRID' AND NOPO='No' ";
$MyRowusr = $connn->query($resultusr);
$rowusr = $MyRowusr->fetch_assoc();
$rfqcount = mysqli_num_rows($MyRowusr);
if ($rfqcount > 0) {
$chkk = 1;
}
$resultusr4 = "SELECT POID FROM po WHERE MSRID='$MSRID' ";
$MyRowusr4 = $connn->query($resultusr4);
$rowusr4 = $MyRowusr4->fetch_assoc();
$rfqcount4 = mysqli_num_rows($MyRowusr4);
if ($rfqcount4 > 0) {
$chkk = 1;
}
$resultusr1 = "SELECT MSRID FROM contract WHERE MSRID='$MSRID' ";
$MyRowusr1 = $connn->query($resultusr1);
$rowusr1 = $MyRowusr1->fetch_assoc();
$rfqcount1 = mysqli_num_rows($MyRowusr1);
if ($rfqcount1 > 0) {
$chkk = 1;
}
if ($chkk == 1) {
continue;
}
?>
<tr>
<td>
<?php echo $vo; ?>
</td>
<td>
<?php echo $row0["MSRID"]; ?>
</td>
<td>
<?php echo $row0["MSRType"]; ?>
</td>
<td>
<?php echo $row0["purposeofbuying"]; ?>
</td>
<td>
<?php echo depName($row0["DepRequester"]); ?>
</td>
<td>
<?php echo $row0["RequestDate"]; ?>
</td>
<td>
<?php echo reqName($row0["RequestPer"]); ?>
</td>
<td>
<?php echo reqName($actionBy); ?>
</td>
</tr>
<?php
$vo++;
}
}
?>
</tbody>
</table>
</div>
</div>

You can use subquery method instead of looping.
Example:
$sql = "SELECT *,
( SELECT owner
FROM tracking
WHERE tracking.MSRID= msr.MSRID
) AS _owner,
( SELECT RFQID
FROM rfq
WHERE rfq.MSRID= msr.MSRID
AND rfq.NOPO='No'
) AS _RFQID
FROM msr
WHERE rfq.Status ='Approved'";

Will a LIKE function give me better results when Match Against function does not give any results in Mysql

Currently, When I type 'M' in the search engine I do not get any results inspite of having a 'Math' value in my database. (I am using Match Against function of mysql on my website). So I decided to make a code that first runs a Match Against function and if no output is obtained, it again runs the search but this time using 'LIKE' function of my sql and if still no result is obtained it shows alert 'no values found'.
the gist of code is somewhat like this..
mysql(Match against function)
If (mysqli_num_rows > 0)
{output}
elseif (mysqli_num_rows < 1)
{ mysqli (LIKE function)
then show output}
else {show alert'no results'}
Will this code give the result 'Math' when I enter 'M' in the search engine.
The actual code.
<?php
if (isset($_POST['go']))
{ $search = $_POST['search'];
$college = $_POST['colleges'];
if (!empty($search))
{
if(isset($_POST['colleges']) )
{
$query1 = "Select filename, description, groupid, emailid, college, upload_date FROM images WHERE MATCH(description) AGAINST('$search') AND college = '$college' group by groupid order by MATCH(description) AGAINST('$search') DESC";
$query_run1 = mysqli_query($con, $query1) ;
}
else
{
$query1 = "Select filename, description, groupid, emailid, college,upload_date FROM images WHERE MATCH(description) AGAINST('$search') group by groupid order by MATCH(description) AGAINST('$search') DESC";
$query_run1 = mysqli_query($con, $query1) ;
$searchresults = mysqli_num_rows($query_run1);
?><p class = "totalresults"> <br />
<br /> &nbsp &nbsp <font size= "4" >Total Results :
<?php
echo $searchresults ;
?>
</font> </p>
<?php
if(mysqli_num_rows($query_run1)>0)
{
?>
<table class="searchenginelist" style="color: black;">
<tr>
<th> Uploader </th>
<th> Title </th>
<th> Date </th>
<th> Upvotes </th>
<th> Downvotes </th>
<th> College </th>
</tr>
<?php
while( $rows = mysqli_fetch_assoc($query_run1))
{
//$imagedisplay = $rows['file'];
$imagename = $rows['filename'];
// mysqli_real_escape_string($con,$imagedisplay);
$descrip = $rows['description'];
$groupid = $rows['groupid'];
//$groupid = $_SESSION['groupid'] ;
$uploader_emailid = $rows['emailid'];
$college = $rows['college'];
?>
<tr>
<td width="70px"> <?php
$query = " SELECT username from userinfo WHERE emailid = '$uploader_emailid' " ;
$query_run = mysqli_query($con,$query );
$raw = mysqli_fetch_assoc($query_run);
echo $raw['username']; ?>
</td>
<td width="450px"> <a href="imagespace.php?groupid=<?php echo $groupid ;?>">
<?php echo $descrip ; ?>
</a>
</td>
<td style="font-size:15px;" width="85px">
<?php echo $rows['upload_date'] ; ?>
</td>
<td align="center" style="color:green;" width="50px">
<?php
$query = "SELECT vote from votes where groupid = '$groupid' and vote = '1' ";
$query_run= mysqli_query($con, $query);
$upvote=mysqli_num_rows($query_run) ;
echo $upvote;
?>
</td>
<td align="center" style="color:red;" width="50px">
<?php
$query = "SELECT vote from votes where groupid = '$groupid' and vote = '0' ";
$query_run= mysqli_query($con, $query);
$downvote=mysqli_num_rows($query_run) ;
echo $downvote;
?>
</td>
<td style="font-size:13px;" width="130px">
<?php echo $college; ?>
</td>
</tr>
<?php
}
?>
</table>
<?php
}
elseif(mysqli_num_rows($query_run1) < 1)
{
$query12 = "Select * FROM images WHERE description LIKE '%".mysqli_real_escape_string($con,$search)."%' group by groupid order by groupid DESC";
$query_run12 = mysqli_query($con, $query12) ;
?> <table class="searchenginelist" style="color: black;">
<tr>
<th> Uploader </th>
<th> Title </th>
<th> Date </th>
<th> Upvotes </th>
<th> Downvotes </th>
<th> College </th>
</tr>
<?php
while( $rows = mysqli_fetch_assoc($query_run12))
{
//$imagedisplay = $rows['file'];
$imagename = $rows['filename'];
// mysqli_real_escape_string($con,$imagedisplay);
$descrip = $rows['description'];
$groupid = $rows['groupid'];
//$groupid = $_SESSION['groupid'] ;
$uploader_emailid = $rows['emailid'];
$college = $rows['college'];
?>
<tr>
<td width="70px"> <?php
$query = " SELECT username from userinfo WHERE emailid = '$uploader_emailid' " ;
$query_run = mysqli_query($con,$query );
$raw = mysqli_fetch_assoc($query_run);
echo $raw['username']; ?>
</td>
<td width="450px"> <a href="imagespace.php?groupid=<?php echo $groupid ;?>">
<?php echo $descrip ; ?>
</a>
</td>
<td style="font-size:15px;" width="85px">
<?php echo $rows['upload_date'] ; ?>
</td>
<td align="center" style="color:green;" width="50px">
<?php
$query = "SELECT vote from votes where groupid = '$groupid' and vote = '1' ";
$query_run= mysqli_query($con, $query);
$upvote=mysqli_num_rows($query_run) ;
echo $upvote;
?>
</td>
<td align="center" style="color:red;" width="50px">
<?php
$query = "SELECT vote from votes where groupid = '$groupid' and vote = '0' ";
$query_run= mysqli_query($con, $query);
$downvote=mysqli_num_rows($query_run) ;
echo $downvote;
?>
</td>
<td style="font-size:13px;" width="130px">
<?php echo $college; ?>
</td>
</tr>
}
?>
</table>
<?php
}
else
{
echo '<script type="text/javascript"> alert ("No results found") </script>' ;
}
}
else
{ echo '<script type="text/javascript"> alert ("No data entered") </script>';
}
}
}

You have some syntax issues in your code, your else statements were not lined up properly, so your page was not working. (For example, you had an } else { lined up with another } else {).
I went through all of the code and formatted it so I could see what the issue was, remember, Some sensible code indentation would be a good idea.
It helps us read the code and more importantly it will help you debug your code.
Take a quick look at a coding standard for your own benefit.
You may be asked to amend this code in a few weeks/months and you will thank me in the end.
<?php
if (isset($_POST['go'])) {
$search = $_POST['search'];
$college = $_POST['colleges'];
if (!empty($search)) {
if(isset($_POST['colleges']) ) {
$query1 = "Select filename, description, groupid, emailid, college, upload_date FROM images WHERE MATCH(description) AGAINST('$search') AND college = '$college' group by groupid order by MATCH(description) AGAINST('$search') DESC";
$query_run1 = mysqli_query($con, $query1);
} else {
$query1 = "Select filename, description, groupid, emailid, college,upload_date FROM images WHERE MATCH(description) AGAINST('$search') group by groupid order by MATCH(description) AGAINST('$search') DESC";
$query_run1 = mysqli_query($con, $query1);
$searchresults = mysqli_num_rows($query_run1);
?>
<p class = "totalresults">
<br />
<br />
&nbsp &nbsp <font size= "4" >Total Results: <?php echo $searchresults; ?></font>
</p>
<?php
if(mysqli_num_rows($query_run1)>0) {
?>
<table class="searchenginelist" style="color: black;">
<tr>
<th> Uploader </th>
<th> Title </th>
<th> Date </th>
<th> Upvotes </th>
<th> Downvotes </th>
<th> College </th>
</tr>
<?php
while( $rows = mysqli_fetch_assoc($query_run1)) {
//$imagedisplay = $rows['file'];
$imagename = $rows['filename'];
// mysqli_real_escape_string($con,$imagedisplay);
$descrip = $rows['description'];
$groupid = $rows['groupid'];
//$groupid = $_SESSION['groupid'] ;
$uploader_emailid = $rows['emailid'];
$college = $rows['college'];
?>
<tr>
<td width="70px">
<?php
$query = " SELECT username from userinfo WHERE emailid = '$uploader_emailid' " ;
$query_run = mysqli_query($con,$query );
$raw = mysqli_fetch_assoc($query_run);
echo $raw['username'];
?>
</td>
<td width="450px">
<a href="imagespace.php?groupid=<?php echo $groupid ;?>">
<?php
echo $descrip;
?>
</a>
</td>
<td style="font-size:15px;" width="85px">
<?php
echo $rows['upload_date'] ;
?>
</td>
<td align="center" style="color:green;" width="50px">
<?php
$query = "SELECT vote from votes where groupid = '$groupid' and vote = '1' ";
$query_run= mysqli_query($con, $query);
$upvote=mysqli_num_rows($query_run) ;
echo $upvote;
?>
</td>
<td align="center" style="color:red;" width="50px">
<?php
$query = "SELECT vote from votes where groupid = '$groupid' and vote = '0' ";
$query_run= mysqli_query($con, $query);
$downvote=mysqli_num_rows($query_run) ;
echo $downvote;
?>
</td>
<td style="font-size:13px;" width="130px">
<?php
echo $college;
?>
</td>
</tr>
<?php
} //end while loop
?>
</table>
<?php
} else if(mysqli_num_rows($query_run1) < 1) {
$query12 = "Select * FROM images WHERE description LIKE '%".mysqli_real_escape_string($con,$search)."%' group by groupid order by groupid DESC";
$query_run12 = mysqli_query($con, $query12) ;
?>
<table class="searchenginelist" style="color: black;">
<tr>
<th> Uploader </th>
<th> Title </th>
<th> Date </th>
<th> Upvotes </th>
<th> Downvotes </th>
<th> College </th>
</tr>
<?php
while( $rows = mysqli_fetch_assoc($query_run12)) {
//$imagedisplay = $rows['file'];
$imagename = $rows['filename'];
// mysqli_real_escape_string($con,$imagedisplay);
$descrip = $rows['description'];
$groupid = $rows['groupid'];
//$groupid = $_SESSION['groupid'] ;
$uploader_emailid = $rows['emailid'];
$college = $rows['college'];
?>
<tr>
<td width="70px">
<?php
$query = " SELECT username from userinfo WHERE emailid = '$uploader_emailid' " ;
$query_run = mysqli_query($con,$query );
$raw = mysqli_fetch_assoc($query_run);
echo $raw['username'];
?>
</td>
<td width="450px">
<a href="imagespace.php?groupid=<?php echo $groupid ;?>">
<?php
echo $descrip ;
?>
</a>
</td>
<td style="font-size:15px;" width="85px">
<?php
echo $rows['upload_date'] ;
?>
</td>
<td align="center" style="color:green;" width="50px">
<?php
$query = "SELECT vote from votes where groupid = '$groupid' and vote = '1' ";
$query_run= mysqli_query($con, $query);
$upvote=mysqli_num_rows($query_run) ;
echo $upvote;
?>
</td>
<td align="center" style="color:red;" width="50px">
<?php
$query = "SELECT vote from votes where groupid = '$groupid' and vote = '0' ";
$query_run= mysqli_query($con, $query);
$downvote=mysqli_num_rows($query_run) ;
echo $downvote;
?>
</td>
<td style="font-size:13px;" width="130px">
<?php
echo $college;
?>
</td>
</tr>
</table>
<?php
} //end while loop
} else { //num rows < 1
echo '<script type="text/javascript"> alert ("No results found") </script>' ;
}
}
} else { //no searches returned
echo '<script type="text/javascript"> alert ("No data entered") </script>';
}
}
I also suggest, for really complex, nested structures, to comment what each ending bracket goes to like I did in your code. I put comments so that I could see exactly what the } was ending.
WARNING: This code may be vulnerable to SQL Injection Attacks. You should Learn about Prepared Statements for MySQLi or PDO. I recommend PDO, which I wrote a function for to make it extremely easy, very clean, and way more secure than using non-parameterized queries.

If you could access the mysql.ini of your host, you could simply change the min word length for full text search.
[mysqld]
ft_min_word_len=N
Otherwise you should decide which search function you want to use. It's not very intuitive for users if one search is a full text search and the other is a simple LIKE.
One way around could also be to only use full text, if the user types more than 2 chars.
// ...
if (strlen($query) < 4) {
$where = "MATCH (...) AGAINST ...";
} else {
$where = "...LIKE ... ";
}
$sql .= $where;
Btw. MATCH AGAINST should normaly return way more results than like, so doing a LIKE search after MATCH AGAINST returns 0 rows, is kinda useless.

php // what should i do to display all courses?

i need to display all courses at once
in my code only display one course what should i do to fix it ?
when i click delete it reload page and display next courses
my code ::
$course = $conn->query("select * from student_course where student_id = $id ") ;
if($course->num_rows > 0) {
?>
<table class="table" >
<tr>
<thead>
<th> courseName </th>
<th> courseID </th>
<th> teacher </th>
<th> DELETE </th>
</thead> </tr>
<?php
while ($Scourse = $course->fetch_assoc()){
$cid=$Scourse['course_id'];
$tid=$Scourse['teacher_id'];
$teacher = $conn->query("select * from teacher where id = $tid ") ;
if($teacher->num_rows > 0) {
while($teacherC=$teacher->fetch_assoc()){
$course = $conn->query("select * from course where id = '$cid' ") ;
if($course->num_rows>0){
while($Ncourse=$course->fetch_assoc()){ ;
?>
<tr> <td><?php echo $Ncourse['name']; ?> </td>
<td><?php echo $Scourse['course_id']; ?> </td>
<td> <?php echo $teacherC['name']; ?> </td>
<td><form method="post"><button type="submit" name="<?php echo $cid ?>"> Delete </button></form> </td></tr>
<?PHP
if (isset($_POST["$cid"])){
$dcourse = $conn->query("delete from student_course where course_id = '$cid' and
student_id=$id ") ;
header("location:scourse.php");
}
}
}
}
}
}
}
</table>
i try to delete teacher and course query it work as i need

You're handling associate arrays improperly.
You will need a foreach loop to loop through each row in the associate array.
Example:
foreach($Scourse as $x) {
echo $x['name'];
echo $x['course_id'];
}
See Loop through Associate Arrays here:
https://www.w3schools.com/php/php_arrays.asp
Edit: See #Qirel comments

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