Assign a image id with php by total count of images - php

Question

Im trying to assign a id for each image returned from the database. The id will then be put into img id. The id needs to be from the total count of the number of database rows returned.
<?php
while ($result = mysql_fetch_assoc($query)) {
$imgURL = $result['imageUrl'];
$imgID = mysql_num_rows($query);
for ($i=0; $i <= $imgID; $i++) {
}
echo"<img id =\"$i\" src=\"uploads/$imgURL\"/>";
}
?>
What i get in return is the images are displayed from the database, but instead of img id being sequential numbers (ie 1, 2, 3 etc.) it just returns me the total count. How can I get it to assign a individual number in order for each image returned?
All help is welcome. Thank you!

Answer 1

You don't even need to calculate the number of rows or have multiple loops. Just let $i be incremented with each pass of the while loop.
$i = 0;
while ($result = mysql_fetch_assoc($query)) {
$imgURL = $result['imageUrl'];
echo '<img id ="' . $i . '" src="uploads/' . $imgURL . '" />';
$i++;
}

Answer 2

You need to put your echo inside your for loop:
for ($i=0; $i <= $imgID; $i++) {
echo "<img id =\"$i\" src=\"uploads/$imgURL\"/>";
}
EDIT:
As an aside, you might not want to identify your images that way. The order of records in your query might not stay consistent depending on your application logic. Each record should have a unique ID in the database and that value would be preferable to the iteration count.

Answer 3

You have a bracket in the wrong place. I have rewritten it for you:
<?php
while ($result = mysql_fetch_assoc($query)) {
$imgURL = $result['imageUrl'];
$imgID = mysql_num_rows($query);
for ($i=0; $i <= $imgID; $i++) {
echo "<img id =\"$i\" src=\"uploads/$imgURL\"/>";
}
}
?>
You might also some consistency problems unless the ID comes from a field in the database. If your query does not have a sort, then you are not guaranteed any particular ordering. The most common way of rectifying this is to create another field called "id", and give it the auto_increment attribute. This way it will give you a unique sequential number that will never change. You can also sort by this number.

Answer 4

You should do something like this. The thing you've done is completely useless, because you are doing the same thing again and again in the same row:
<?php
$imgID = 0;
while ($result = mysql_fetch_assoc($query)) {
$imgURL = $result['imageUrl'];
echo"<img id =\"$imgID\" src=\"uploads/$imgURL\"/>";
$imgID = $imgID + 1;
}
?>