Join David Powers for an in-depth discussion in this video Finding the images, part of Code Clinic: PHP.
- If you want to work along with me, copy the exercise files…for this month's challenge into your testing server.…I've got them in the problem05 folder…of my PHP Clinic site.…The first task is to search the directory structure…for the images.…The traditional way to do it is with a recursive function…like this one in getImages_recursive.php…This is the function that was described…in the previous video.…You can find a copy of it in the 05_03 folder…of the exercise files.…
I've copied it to the top level of the problem05 folder.…Line 24 calls the getImages function and it passes a single…dot as the argument.…This means begin at the current folder so it'll go through…the problem05 folder and all of its subfolders.…The result is stored as images so we can use print_r…to inspect the result.…Let's try that in a browser.…And there are all the images.…They're actually in the /05_03/images folder.…
So the recursive function works, but it's cumbersome.…Traversing directories to search for files is such a common…requirement the standard PHP library or SPL provides…
David introduces challenges and provides an overview of his solutions in PHP. Challenges include topics such as statistical analysis, searching directories for images, and accessing peripheral devices.
Visit other courses in the series to see how to solve the exact same challenges in languages like C#, C++, Java, Python, and Ruby.
Skill Level Intermediate
Q: I'm encountering script errors message with the prime_dates.php file used in the "Priming the date_record column" movie in this course. How can I resolve these errors?
A: To avoid script errors, use bindValue() instead of bindParam() in
Line 9 of the prime_dates.php file. You can also download the latest
copy of the exercise files, which corrects this issue for you. For a
more in-depth explanation of the difference between bindValue() and
bindParam(), check out the "Binding input and output values" video (http://www.lynda.com/PHP-
Q: Why can't I access the Lake Pend Orielle site (http://lpo.dt.navy.mil)?
A: The Lake Pend Orielle site is not accessible in some geographical areas. We have contacted the owner of the server to try to resolve this issue.
Q: I am unable to access the Lake Pend Oreille data from outside the U.S.
A: A static copy of this data is provided here for lynda.com members outside of the U.S
Problem One: Statistical Analysis
Problem Two: Image Analysis
Problem Three: Eight Queens
Problem Four: Accessing Peripherals
Problem Five: Recursion and Directories
Problem Six: Building the Web
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