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Similar to the proceeding videos, we'll accept and filter user data, then write that data to the database.
Course
Build a Basic PHP Website: Escaping Output
Documentation
trim() strips whitespace (or other characters) from the beginning and end of a string.
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We're already adding projects so
0:00
we can duplicate that work with
minimal changes for adding tasks.
0:02
Not only will this save time,
it also keeps things consistent,
0:07
which makes it much easier
to read the code later.
0:11
Applications are almost never
launched once and left on their own.
0:15
You'll need to add features and fix bugs.
0:19
Having code that is easy to read will
make both of those jobs much easier.
0:22
>> Let's start in functions.php again.
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This time,
we'll copy the add_project function.
0:29
Well rename it add_task.
0:34
Adding a task will take different
parameters, so let's set those up.
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First, we need project_ id, then title.
0:43
Then date and time.
0:49
Next, we can change our SQL
statement to use those parameters.
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INSERT INTO tasks.
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Project_id, title.
1:01
Date, and time.
1:07
Making sure we add the right
number of placeholders.
1:12
And finally,
we'll bind those parameters to our query.
1:15
Let's duplicate this first bind twice.
1:19
The first placeholder is project_id.
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Which is an INT.
1:28
So let's change this to PARAM_INT.
1:30
The second placeholder
we can leave as title.
1:34
The third placeholder is date, and
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the fourth placeholder is time,
which is also an INT.
1:43
Great, our function is ready to go.
1:50
Let's get our task page set up.
1:52
Let's preview the task
form in the browser first.
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Choose Add Task and we see our form.
1:58
First we have a drop down for projects.
2:02
And we need to populate this
with options from the database.
2:05
We also see that each of
these fields is required.
2:09
Now let's open task.php and get to work.
2:13
First, let's populate
the project drop down.
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This is pretty much our project list.
2:20
So let's copy the foreach
loop from that file.
2:22
Now let's change the list to an option.
2:34
Our value will be our project_id.
2:50
And will display the title.
2:57
Then finish off our option.
3:01
Now we're ready to filter the user input
and send it to our add task function.
3:05
Let's go back to project.php and copy
the entire request method conditional.
3:10
Let's duplicate this
first filter line twice.
3:24
And make these project_d,
3:28
title, date and time.
3:32
Project_id and time are both integers.
3:43
So let's change this to NUMBER_INT.
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And this one as well.
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FILTER_SANITIZE_NUMBER_INT.
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Now let's change our error message
to check for the required fields.
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Project_id, title, date, and time.
4:12
Project, title, date, and time.
4:22
Next, instead of add_ project,
we want to use add_
4:26
task, And we'll pass in our variables.
4:30
And instead of redirecting to
project_list let's redirect to task_list.
4:49
And also change the error
message to Could not add task.
4:57
Finally, we need the code to
display the error message.
5:01
Let's copy the error message
from the project page and
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paste it back into our task page.
5:11
Looks great.
5:16
We're ready to test out the form.
5:19
Back in the browser,
let's start by submitting an empty form.
5:21
We see the error message telling us that
we need to fill in the required fields.
5:26
So let's do that,
except let's not select the project.
5:30
Again, we see the error message letting
us know to fill in the required fields.
5:41
And, all the data we did fill in is gone.
5:45
Yikes.
What a pain.
5:49
But hey, this is our site, so
we can do something about that.
5:51
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