Yuri Yarlei wrote:
> sorry, maybe I have been lazy in that comment, I admit, whem wrote that
> solution I was in a such hurry and without time. I dont really read what I
> wrote, but now I think this solution is good.
>
>
> <select name="categories" multiple style='width:120px;height:150px'>
> <?
> $sql = "SELECT id,name FROM categories";
> if ( ( $results = mysql_query($sql, $conn) ) !== false ) {
> while ( $row = mysql_fetch_assoc($results) ) {
> $selected = ($id == $row['id'] ? 'selected="selected"' : '');
> echo "<option value=".$row['id']."
> ".$selected.">".$row['name']."</option>";
> }
> }
> ?>
> </select>
>
doesnt quite work: there was a conflict with a $id that I fixed; but
your code did not pass the $selected ids - don't know why.
Here's what finally worked and it required the categoriesIN[] for the name:
echo "<select name='categoriesIN[]' multiple size='8'>";
if ( ( $results = mysql_query($sql, $db) ) !== false ) {
while ( $row = mysql_fetch_assoc($results) ) {
if (in_array($row['id'], $selected)) {
echo "<option value=", $row['id'], " selected >",
$row['category'], "</option><br />";
}
else echo "<option value=", $row['id'], ">",
$row['category'], "</option><br />";
}
}
I think it will work now. Thanks much for the input & the support. :-)
>
>
>
>> Date: Wed, 17 Jun 2009 10:16:15 +0100
>> From: [email protected]
>> To: [email protected]
>> Subject: RE: [PHP] populate form input option dropdown box from existing data
>>
>> On 16 June 2009 20:48, PJ advised:
>>
>>
>>> Now, I was happy to learn that it is simpler to populate the
>>> insert new
>>> books page dynamically from the db. Much shorter & neater.
>>> It looks to me like the best solution for the edit page is
>>> close to what
>>> Yuri suggests.
>>> Since the edit page is very similar to the insert new books page, I
>>> merely need to populate the Select options box slightly differently.
>>> This is the code to populate the insert page:
>>> <select name="categoriesIN[]" multiple size="8">
>>> <?php
>>> $sql = "SELECT * FROM categories";
>>> if ( ( $results = mysql_query($sql, $db) ) !== false ) {
>>> while ( $row = mysql_fetch_assoc($results) ) {
>>> echo "<option value=", $row['id'], ">", $row['category'],
>>> "</option><br />"; }
>>> }
>>>
>>> </select>
>>>
>>> The problem nowis to find a way to add a conditional clause above that
>>> will insert the option="selected" in the output.
>>> The input for this comes from:
>>> // do categories
>>> $sql = "SELECT id, category FROM categories, book_categories
>>> WHERE book_categories.bookID = $idIN &&
>>> book_categories.categories_id = categories.id";;
>>> if ( ( $results = mysql_query($sql, $db) ) !== false ) {
>>> while ( $row = mysql_fetch_assoc($results) ) {
>>> echo$row['id'], "<br />";
>>> }
>>> }
>>>
>>> This may return any number of category ids so the problem is to figure
>>> out a way to pass the ids from the above code to the right ids in the
>>> first code above. How & what do I search to match the two ids?
>>>
>> Well, if I'm understanding your queries correctly, you need to compare
>> the two sets of $row['id'] from the two queries above -- so your first
>> query should be the second one above ("SELECT id, category FROM ..."),
>> and you need to save the ids it returns for use in the loop which emits
>> the <select>s. This can be done by replacing the "echo $row['id']" with
>> "$selected_ids[] = $row['id']". Now you have an array of the selected
>> ids which you can use in your in_array(). So your finished code is going
>> to look something like this:
>>
>> <select name="categoriesIN[]" multiple size="8">
>> <?php
>> // do categories
>> $selected_ids = array();
>> $sql = "SELECT id, category FROM categories, book_categories
>> WHERE book_categories.bookID = $idIN &&
>> book_categories.categories_id = categories.id";
>> if ( ( $results = mysql_query($sql, $db) ) !== false ) {
>> while ( $row = mysql_fetch_assoc($results) ) {
>> $selected_ids[] = $row['id'];
>> }
>> }
>> $sql = "SELECT * FROM categories";
>> if ( ( $results = mysql_query($sql, $db) ) !== false ) {
>> while ( $row = mysql_fetch_assoc($results) ) {
>> echo "<option value=", $row['id'],
>> (in_array($row['id'], $selected_ids)?" selected":""),
>> ">", $row['category'],
>> "</option>\n";
>> }
>> }
>> ?>
>> </select>
>>
>> Hope this helps.
>>
>> Cheers!
>>
>> Mike
>>
>> --
>> Mike Ford, Electronic Information Developer,
>> C507, Leeds Metropolitan University, Civic Quarter Campus,
>> Woodhouse Lane, LEEDS, LS1 3HE, United Kingdom
>> Email: [email protected]
>> Tel: +44 113 812 4730
>>
>>
>> To view the terms under which this email is distributed, please go to
>> http://disclaimer.leedsmet.ac.uk/email.htm
>>
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>> PHP General Mailing List (http://www.php.net/)
>> To unsubscribe, visit: http://www.php.net/unsub.php
>>
>>
>
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