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Foreach Loops7:23 with Alena Holligan
I've saved the best for last! Foreach loops are my favorite when looping through arrays. You can use foreach loops with any type of array, and your array can have any key value. You can choose to grab just the item value or the key value as well. A foreach loop is a lot like combining the WHILE statement with the each function, only even easier.
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
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