Join David Powers for an in-depth discussion in this video Extracting Exif and IPTC metadata, part of Code Clinic: PHP.
- We've identified the images…in the current directory structure,…and stored their location and file names in an array.…The results show the images are .jpgs with one exception,…it's this one here which is a .png.…To get the captions from each image,…we need to extract the metadata.…I'm going to start with extracting the metadata from a .jpg.…So let's just select one of these .jpgs here,…it doesn't matter which one, and then Copy that value,…go back to the editing program, create a new .php file,…save it as, "metadata.php",…and then assign that value to a variable.…
I'm using Windows, so PHP has inserted…backslashes in the path.…PHP on Windows works both with backslashes…and with forward slashes in paths.…If you're on Mac or a Linux, of course,…it will be forward slashes only.…Let's start by getting the Exif metadata.…So we'll save that as "exif" and then we'll use…the exif_read_data function, and pass it the image.…The image must be a .jpg or a .tiff.…And this returns an array,…which we can inspect with print_r.…
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
PHP with MySQL Essential Trainingwith Kevin Skoglund14h 32m Beginner
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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