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Working With Results
6:05After successfully querying our database and taking a look at our PDO Statement results object, we still need to work with our results to get the properly formatted data to our users. Let's take a look at how to bend these results to our will.
After successfully querying our database
and
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taking a look at our PDO statement results
object, we're still gonna need to
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work with our results to get the properly
formatted data to our users.
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Let's take a look at how to bend these
results to our will.
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Let's build out and work with our results
set, by making our
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index page of films link off to a single
film and
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then we can just query the database for
just one film by using say the film ID.
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So we have a 1,000 results, let's go ahead
and
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start by cleaning up our index file and
listing out our films and
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populating the actual list with what we
have here from our database.
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So switch back over to our index.php file.
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We don't need to do this inside of our try
catch.
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So, I'm actually gonna cut that out.
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So, once we have our results set and
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we've run the query we can actually just
come down here and do what we need to do.
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I don't wanna die anymore.
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I actually don't need our pretags any
longer.
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Let's get rid of all those, and instead of
dumping this out,
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I actually wanna take my result set and
store it to a variable.
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The variable here that makes sense to me
is $films plural.
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Okay so result set, fetchAll will store to
a variable called films and
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films will be that 1,000 item array from
our result set or from our films database.
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So going down,
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we're gonna use some standard PHP at the
very bottom of this file.
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Here we have our ordered list.
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So let's go ahead and open up some
foreach after we open up our PHP tags.
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So we'll go ahead and open those now and
get started.
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PHP, all right I'm gonna close those guys
out.
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And then here we're going to do a
foreach, so foreach.
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And then $films as $film.
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[BLANK_AUDIO]
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All right, we're going to open up and
close our curly braces and
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then here we're actually going to have one
of these items.
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So I'm going to cut one from here and
paste it in.
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All right, so in order to use this with
our
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looping PHP code, we're gonna need to
modify this just a little bit.
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So we'll start by adding our echo
statement, and
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then we'll surround this entire thing in
single quotes for now.
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Okay, and all that will do is just echo
the string,
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as it is right now, a thousand times.
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Let's double check that that works as we
expect.
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All right, you have Film One a lot of times.
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We don't need that.
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Let's go back and make this echo statement
do what we want.
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So, we're gonna use this same class, lens,
except we wanna modify this spot
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right here where it says Film One with our
actual film title.
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And we'll say use string concatenation
with the dot symbol, and then do $film.
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Kay, we gotta put some single quotes here
to stop the actual string.
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There we go.
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Film, so our column name will be title.
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So we'll open up some double quotes here,
and use title, hit Save.
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Kay now let's go back and
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refresh and see if that gives us our film
titles, and it does.
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So here is the one through 1,000 of all of
our films.
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But it doesn't go anywhere.
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So, we actually need to link this off
somewhere.
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So let's go back to our code and see how
we're gonna do this.
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So on the same line here as our actual
list items.
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We're gonna open up that anchor tag just
after our little image,
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our little video icon.
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So we'll do an A, and then href equals,
and
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we'll use double quotes here, and then
we'll say films.php.
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Now that file doesn't exist yet, but it
will.
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And then we're going to pass through a get
variable, an argument here, and
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that's gonna be called ID.
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We're gonna set ID equal to, and
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we wanna set it equal to something that's
going to be unique for the database,
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and in our case, if we go back to the
sakila manual, so we'll do sakila.
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Let's see, it's right here in our history.
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And then we're gonna look at our film
table.
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So in our film table, you'll see that the
film ID is a surrogate primary key used
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to uniquely identify each film in table.
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It's exactly what we're looking for.
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So we will use film_id and
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since the column names correspond to the
key of the array.
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We should be able to use film_id directly
in our code.
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We'll do that by doing more string
concatenation, so
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gonna break this string with single
quotes,
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add more of our concatenation dots here,
and then do $film.
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Okay?
And then open up for an array index.
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And in here we're going to use, let's see,
film_id.
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Let's Save that, refresh our page, and see
if it gives us what we expect.
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Well they are all links, that's good.
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And so see now, if you look at the link in
the status bar at the bottom,
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you should be able to see it says ID equal
to and then there is an array index or
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a film ID index equal to the ID.
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So that's good.
So when we click on one of these guys.
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You'll see it's gonna give us a 404 Not
Found.
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So let's solve that now by creating the
films.php.
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I don't need this anymore, close it.
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And now in here, right click, New File
films.
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