Foreach Loops

I've saved the best for last. 0:00 foreach Loops are my favorite when it comes to looping through arrays. 0:02 You can use foreach Loops with any type of array and 0:06 your array can have any key value. 0:10 You can choose to grab just the item value or the key value as well. 0:12 A foreach loop is a lot like combining the while statement with the each function 0:17 only even easier. 0:22 Enough talk. 0:24 Let's start using a for each loop to loop through our associative array of tasks. 0:24 I've included a file to download in the teacher's notes for our list of items. 0:30 It's called list.php, and 0:34 it contains a multi-dimensional array called list that is formatted 0:36 exactly like the multi-dimensional array we created earlier. 0:41 I just added a few more items for testing purposes. 0:46 Feel free to create your own list of to do items. 0:49 >> We're going to be using the for each loop extensively for our to do app. 0:53 So let's open up our todo.php file. 0:57 Instead of adding the array directly, let's include the list.php file. 1:01 After downloading the file from the teacher's notes, 1:07 you can upload the new file by right clicking and choosing Upload File. 1:09 We then choose list.php. 1:15 And then choose Open. 1:20 Now we can remove this array and include list.php. 1:24 The include works just as if we had pasted the code from our list.php 1:32 file directly into this file. 1:37 But by using an include, we can keep things organized and easier to read. 1:40 Now, that our list array is available to loop through, 1:45 let's start our foreach loop. 1:48 Since, this is a foreach loop, we use the keyword foreach. 1:52 We then add parentheses for our evaluation, and curly braces for 1:56 the code we'll be executing with each loop. 2:00 This is just like we've done for the other loops. 2:05 Within the parentheses we tell the loop which array we want to use. 2:08 We then use the keyword as, for 2:14 each item in our list we want to work with it as the variable item. 2:17 This will assign one item from the list to the variable item on each loop. 2:24 Item is now an associative array with a named key and value. 2:30 Within the curly braces, we can add echo 2:34 $item title. 2:39 And then a line break. 2:44 Now let's preview this file in the browser. 2:47 We see a list of item titles which is just what we want, along with our var_dump. 2:51 We can get rid of that. 2:57 Now let's go back and display our items as a table with all the associated values. 2:58 We'll remove this var_dump and then we'll add our table. 3:04 We need the table tags to be on the outside of our foreach loop because we 3:09 only want to add those once. 3:13 Let's also set up a header row before the loop as well. 3:23 For each loop, we're going to add a new row to the table. 4:05 So let's add our opening and closing table row tags. 4:09 Now we can add table cell tags around the title. 4:22 And we can change our line break to end the table cell. 4:31 Let's duplicate the title row three times for priority, due date and 4:36 completion status. 4:40 Now, let's refresh the browser again. 4:49 This time, we see a list of items in a table with their priority, due date, and 4:52 completion status. 4:57 The completion status only shows us 1 if complete, 4:59 which we know means true but it's not very user friendly. 5:03 Let's add a conditional so we can change the display of the complete status. 5:07 We'll put the opening and closing table cells on their own line. 5:12 Then we'll add an if statement between them. 5:21 If complete 5:23 Then we can echo yes. 5:31 Else we'll echo no. 5:36 Now let's refresh our browser again. 5:42 This time we see yes or no, depending on the item status. 5:45 I told you we can also grab the key along with the value. 5:50 So let's create a new foreach loop. 5:54 Let's add this new foreach above the table. 5:57 Instead of just saying, foreach loop as $item, 6:06 we're going to add a second variable to represent the key. 6:10 Let's call this $key and we add it before the item. 6:15 Then we use our double arrow, = > to represent 6:19 the key value relationship just like we used when assigning our associative array. 6:24 Now let's echo out our key along with the item. 6:30 Now let's refresh our browser. 6:51 Now we can see the key along with the title of each item. 6:53 >> Great job learning to use the foreach loop. 6:58 I know that you'll find it as useful as I do. 7:01 We have our to do app displaying our list of items with all the details, but 7:04 I haven't shown you how to do some more advanced sorting on our multi-dimensional 7:08 arrays and this list could really use some help with sorting. 7:12 So in the next video, I'm going to combine the things that 7:15 we've learned throughout this course to make our to do app a lot more functional. 7:18