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Alter PHP code to include PHP echo variable

pda4me asked
Last Modified: 2012-05-12
I have a PHP variable like this:
<?php echo($row['PHOTO_URL']); ?>

I have another variable like this that signifies the amount of photos:
<?php echo($row['PHOTO_QUANTITY']); ?>

The actual photo URL looks like this:

When the PHOTO_QUANTITY is any value more than one, it means a new URL starting with a _2.jpg and so forth is appended to the PHOTO_URL like this:
etc., etc.

How do create an IF statement or something along those lines that uses the PHOTO_QUANTITY value to display thumbnails of these photos dynamically.  The PHOTO_QUANTITY is not constant so hardcoding will not work.
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