Question

I have some trouble with this.

I have one database with the following tables:
Countries -> All countries of the world are added
Cities -> The cities are also added
user_profile -> The profile of the user with the fields “country” & “city”.

Everything works fine, even the populating of the boxes is working. But I don’t know how to get the SELECTED value of the user for both country & city.

I have the following code:

Select Country: <br />
<select id="countries">
<option value="">--</option>

<?php
$sql = "SELECT country, title FROM countries ORDER BY title ASC";

$rs = mysql_query($sql);

while($row = mysql_fetch_array($rs))
{
  echo "<option value=\"".$row['country']."\">".$row['title']."\n  ";
}
?>
</select>


Select City: <br />
<select id="cities">
<option value="">Select one</option>

<?php
$sql = "SELECT country, title FROM cities ".
"ORDER BY title ASC";

$rs = mysql_query($sql);

while($row = mysql_fetch_array($rs))
{
  echo "<option class=\"".$row['country']."\"  value=\"".$row['title']."\">".$row['title']."\n  ";
}
?>
</select>

Now I need to check in the table user_profile which country & city he chose and show it to him.

I also use jchained (jquery plugin) to make both select boxes working together.

How can I achieve this? If I need to post anything else, please let me know.

Thanks in advance.

Answer 1

You have a lot of missing code here but I will try to help.

I am going to start by assuming that you have already stored the users selections in the user_profile table and that they are foreign keys to to correct relations.

To get the selected id’s for repopulating the select boxes with the selected flag use:

SELECT country, city FROM user_profile where id = $user_id;

To get the text values you would do something like:

SELECT country.title as country, city.title FROM user_profile LEFT JOIN countries ON user_profile.country = country.id LEFT JOIN cities ON user_profile.city = cities.id WHERE user_profile.id = $user_id;

If you are not storing them as foreign key relations but instead by string title in the user_profile table you will need to do this:

SELECT country.title as country, city.title FROM user_profile LEFT JOIN countries ON user_profile.country = country.title LEFT JOIN cities ON user_profile.city = cities.title WHERE user_profile.id = $user_id;

You can then use these results to either display to the user or set the “SELECTED” flag in the options box.