Join David Powers for an in-depth discussion in this video Building the web service response, part of Code Clinic: PHP.
…We've removed the final comma from each of the final data…strings and we now need to calculate the mean and median averages.…To do that we need a copy of the average class definition.…So let's go up to the top of the page podata.php.…Insert a couple of lines afer the opening php tag.…Then require once.…It's foundationphp/calculate/average.php.…Then use the use operator to import it, foundationphp\calculate\average…and we can assign it to an alias AVG.…
And we need to continue the script in…the conditional state where we left off, so scroll…back down again and the new code needs to go here on line 83 after we get wind.…We need to create three instances of the average class.…One for each set of data.…So I'll call it IR Sats equals new AVG using that alias.…The average class expects an array as it's argument.…
We don't have arrays yet, but we're not going to leave the…arrays for anything else, so we can build them directly in the constructor.…Using the explode function.…So explode, the delimiter that we are looking for is…
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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