Fill options with function using mysql in php - php

Question

I'm trying to fill in the different options on a form calling objects from a database using a different php file. Here is my code:
PHP Code (functions.php):
<?php /* Gets values from sql and inserts into html options values */
function selectOptions($column, $table){
// fetch records
$sql = "SELECT" . $column. "FROM" . $table. "ORDER BY Id";
$result = $conn->query($sql);
//check there are more than 0 rows
if ($result->num_rows > 0) {
while ($row = $result->fetch_assoc()) {
echo '<option>' .$row['$column']. '</option>';
}
}
else {
echo '<option>No results!</option>'; } } ?>
HTML code:
<?php
require "php/dbconnect.php";
require "php/functions.php";
?>
<select class="form-control">
<option>SUBJECT</option>
<?php
selectOptions("Subjects", "general_subjects");
?>
</select>
I use this function multiple times for different forms, so I figured having it in its own file would be the best approach but it does not work. When I use the function without variables inside the index.php file, it seems to work. I don't know what I am doing wrong
EDIT: Image of what it should be doing Image of index.php

Answer 1

Add spaces to your sql query. Also you need to access the $column variable properly. You shouldn't wrap it around single quotes as it is a variable. You also have a variable scope issue as $conn does not exist
function selectOptions($conn, $column, $table) {
// fetch records
$sql = "SELECT `" . $column . "` FROM `" . $table . "` ORDER BY Id"; #add spaces
$result = $conn->query($sql);
//check there are more than 0 rows
if ($result->num_rows > 0) {
while ($row = $result->fetch_assoc()) {
echo '<option>' . $row[$column] . '</option>'; #remove single quotes
}
} else {
echo '<option>No results!</option>';
}
}
When you call the above function, add the echo keyword
<?php
echo selectOptions($conn, "Subjects", "general_subjects"); #echo the function
?>

Answer 2

Would you try editing your function.php sql part like this
$sql = "SELECT " . $column. " FROM " . $table. " ORDER BY Id";
i think the spaces is the reason that it's not returning data