Display data from database using explode in php - php

Question

I have table named "test". I would like to retrieve data from one column. Each row have multiple data separate with coma. How can i display all the data of column in drop-down?
ID | Qualification
1 | BE,Phd,ME
2 | MCA,MBA
3 | MBA
How can i display all the data of Qualification column in dropdown? Output should be like following
BE
Phd
ME
MCA
MBA
MBA

Answer 1

Loop throught your rows and create an array of each row by exploding the rule. Then merge the arrays together. Something like this:
//Example data TODO: replace with your table data
$rows[0]['Qualification'] = 'a,b,c';
$rows[1]['Qualification'] = 'a,b,c';
$qualificationArray = array();
foreach($rows as $rowData)
{
$rowDataArray = explode(',',$rowData['Qualification']);
$qualificationArray = array_merge($qualificationArray,$rowDataArray);
}
Then use the qualificationArray to create an dropdown
echo '<select name="qualification">';
foreach($qualificationArray as $qualification)
{
echo '<option value="'.$qualification.'">'.$qualification.'</option>';
}
echo '</select>';
So the output of this is a dropdown of every value:
<select name="qualification">
<option value="a">a</option>
<option value="b">b</option>
<option value="c">c</option>
<option value="a">a</option>
<option value="b">b</option>
<option value="c">c</option>
</select>

Answer 2

First off, read all the data from the database:
$quals = array(); // This is the array where we are going to store all the data.
if ($result = $db->query("SELECT * FROM `test`"))
{
while ($row = $result->fetch_assoc())
{
$quals[$row['ID']] = $row['Qualification'];
}
}
The rows are now stored in $quals in the form $quals[ID] = CommaSeperatedQualifications.
Next, create the drop-down by
Iterating through each element in $quals.
Separating the comma-separated list, Qualification into an array of elments, say $list.
Further iterating through $list and printing the <option>s of the drop-down.
For example:
// now create a drop-down
echo '<select name="list_of_quals">';
foreach ($quals as $id => $value)
{
$list = explode(',', $value);
foreach ($list as $item)
{
echo '<option value="' . $id . '">' . $item . '</option>';
}
}
echo '</select>';