While loop not working in PHP - php

Question

While loop not working not showing anything.
My code is working when I use without creating a function on the same page but when I create function on functions.php and call it, it does not work.
<?php
include "include/db.php";
function search(){
global $connection;
$record_search = $_GET['search'];
$record_search = mysqli_real_escape_string($connection, $record_search);
$query_search = "SELECT * FROM users WHERE u_name='$record_search' OR u_roll='$record_search' ";
$result_search = mysqli_query($connection, $query_search);
if(!$result_search){
die("FAIL" . mysqli_error($connection));
}
while ($row_search = mysqli_fetch_array($result_search)) {
$name_search = $row_search[1];
$f_search = $row_search[2];
$school_search = $row_search[3];
$roll_search = $row_search[4];
$email_search = $row_search[5];
$class_search = $row_search[6];
}
}
?>
and
<?php
if(isset($_GET['search'])){
global $connection;
global $result_search;
search();
?>
<table class="table">
<thead>
<thead>
<tr>
<th>#</th>
<th>First Name</th>
<th>Father Name</th>
<th>School</th>
<th>Roll No</th>
<th>Email</th>
<th>Class</th>
</tr>
</thead>
<tbody>
<tr>
<th scope="row">1</th>
<td><?php echo #$name_search; ?></td>
<td><?php echo #$f_search; ?></td>
<td><?php echo #$school_search; ?></td>
<td><?php echo #$roll_search; ?></td>
<td><?php echo #$email_search; ?></td>
<td><?php echo #$class_search; ?></td>
</tr>
<?php } ?>
</tbody>
</table>
You can see nothing happen:

Answer 1

Did you try to connect to the mysql before the execution of the query. Maybe, you have put the connect code in the other file, however couldn't see it here so just wondering.

Answer 2

your code should be like below, hope it will work to you.
function search(){
global $connection;
$record_search = $_GET['search'];
$record_search = mysqli_real_escape_string($connection, $record_search);
$result_search = mysqli_query($connection, $query_search);
if(!$result_search){
die("FAIL" . mysqli_error($connection));
}
$query_search = "SELECT * FROM users WHERE u_name='$record_search' OR u_roll='$record_search' ";
return $row_search = mysqli_fetch_array($result_search);
}
<table class="table">
<thead>
<thead>
<tr>
<th>#</th>
<th>First Name</th>
<th>Father Name</th>
<th>School</th>
<th>Roll No</th>
<th>Email</th>
<th>Class</th>
</tr>
</thead>
<tbody>
<?php
$search_results = search();
$i=1;
foreach($search_results as $row_search){
$name_search = $row_search[1];
$f_search = $row_search[2];
$school_search = $row_search[3];
$roll_search = $row_search[4];
$email_search = $row_search[5];
$class_search = $row_search[6];
?>
<tr>
<th scope="row"><?php echo $i ?></th>
<td><?php echo $name_search; ?></td>
<td><?php echo $f_search; ?></td>
<td><?php echo $school_search; ?></td>
<td><?php echo $roll_search; ?></td>
<td><?php echo $email_search; ?></td>
<td><?php echo $class_search; ?></td>
</tr>
<?php
$i++;
} ?>
</tbody>
</table>