Join David Powers for an in-depth discussion in this video Extracting XMP metadata, part of Code Clinic: PHP.
- The Metadata in the ping file is stored…in a format called XMP which stands for…Extensible Metadata Platform.…Although there is only one file in our set of images…that uses XMP it's commonly used for storing metadata…in a wide range of files including…JPEGs, PDFs, and audio and video files.…So it is important to know how to deal with XMP.…Unfortunately PHP doesn't provide…specialized tools for extracting XMP metadata.…
But it's not too difficult once you…understand what you are looking for.…So let's go back to the editing program…and to organize_images.php.…We're getting the captions here,…there's no caption coming from the ping file.…So what I'm going to do is to add an else block here,…and inside the else block use echo,…then file get contents, and pass it path,…which will be the ping file.…File get contents gets the contents of the file,…echo displays it, but it won't display it as an image…it will display it as a string,…and that is exactly what I want.…
So let's just save that.…And then refresh, organize_images.php in the browser.…
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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