WEBVTT 00:00.500 --> 00:00.830 I will. 00:00.830 --> 00:03.410 Going back again to another video lecture in PHP. 00:03.440 --> 00:08.720 And in this video lecture we go ahead and look at classes in PHP. 00:15.530 --> 00:19.790 So PHP is an object oriented programming language. 00:19.820 --> 00:22.880 So we are going to learn about classes. 00:22.970 --> 00:26.900 So classes is just a blueprint. 00:26.930 --> 00:30.950 It can be called a specification for a custom data type. 00:30.950 --> 00:37.730 So what I mean is that in PHP you can able to create some data types like integer data types, strings 00:37.730 --> 00:40.580 data types and boring data types. 00:40.580 --> 00:45.770 Then these alphabets and these are numbers. 00:45.770 --> 00:48.830 And there are two of those for Boolean and so on. 00:48.830 --> 00:57.740 But there are some things we want to be able to represent like a objects something like your yourself 00:57.770 --> 01:04.960 car book, laptop and foams and you'll be like, how do we represent this? 01:04.960 --> 01:07.570 So that is where classes come in. 01:07.570 --> 01:12.550 It enables us to create our own custom data type. 01:12.610 --> 01:20.230 So once we are talking about classes, we are trying to create your own custom data types because we 01:20.230 --> 01:27.880 have that ability to create normal data types like integers, uh, strings, booleans and so on. 01:27.970 --> 01:34.990 So we can create our own custom data types because we can't represent everything in variables like string 01:34.990 --> 01:36.670 numbers or booleans. 01:37.090 --> 01:42.370 So and by creating our own custom data types we are creating uh classes. 01:42.370 --> 01:46.210 So class is a specification of a custom data type. 01:46.600 --> 01:51.250 And we can use that to model anything we want to do. 01:51.280 --> 01:58.720 Now let me go ahead and uh, let us do this with a practical example. 01:58.930 --> 02:10.270 Let me go ahead and say I want to create a class of a car, and then this class of a car is a blueprint 02:10.300 --> 02:16.840 about a car, and the editor module creates a class of anything. 02:16.870 --> 02:23.890 You are going to break that down into variables of, uh, let me say I'm going to break that down into 02:23.920 --> 02:24.910 attributes. 02:25.330 --> 02:31.090 Now, if I want to break down cars or the attributes of a car, like the year the car was made, the 02:31.090 --> 02:36.490 color of the car, the manufacturing and the name of the car. 02:36.490 --> 02:40.480 So we go ahead and, uh, create a curly brace. 02:40.480 --> 02:44.530 And here I'm going to break down the attributes of this car. 02:44.530 --> 02:48.580 So if I want to break that down I'll put them into variables. 02:48.580 --> 02:55.480 So I'm going to say var and then I'm going to actually put in. 02:55.510 --> 02:59.020 Let me say the first one is the name of the car. 02:59.470 --> 02:59.950 Right. 02:59.950 --> 03:02.850 So And, uh, let me see. 03:02.850 --> 03:06.930 The next one I want is the year of the car. 03:08.730 --> 03:13.470 Then the next one is the color of the car. 03:13.500 --> 03:17.610 Now, these are the blueprints or the attributes of this car. 03:17.610 --> 03:24.690 So the class is the blueprint and the whatever it is in there is the actual bus and the the actual bus 03:24.720 --> 03:26.070 is what we are going to use. 03:26.070 --> 03:28.200 We have not created the real object. 03:28.230 --> 03:30.000 Now we have gotten the actual bus. 03:30.030 --> 03:34.710 What we need to do now is to go ahead and create an object of this car. 03:34.710 --> 03:39.870 So the object of the car is known as the instance of the class. 03:41.220 --> 03:48.510 So the object we are creating is not at the instance of that class, the actual car which we are going 03:48.510 --> 03:51.300 to model and which the objects are going to create. 03:51.330 --> 03:53.490 Now let's go ahead and create that. 03:53.520 --> 03:58.410 I'll go ahead and say create this variable called car and let me call out to be car one, because we 03:58.410 --> 04:01.640 might be dealing with more or different cars and they're their guidance. 04:01.670 --> 04:02.030 See? 04:02.060 --> 04:03.950 New car. 04:03.980 --> 04:07.310 Now we have a new car, kind of with a semicolon. 04:07.340 --> 04:10.700 Now this, which we created right in here. 04:10.700 --> 04:17.480 The new car is the object of this car, which is the instance of the actual class. 04:18.440 --> 04:24.980 So now let's go ahead and specify the this attributes which we just created over here. 04:25.010 --> 04:30.290 So here is where I'm going to give in the name of the car the year and the color. 04:30.320 --> 04:36.800 So I'm going to say car one then. 04:36.830 --> 04:46.370 And for me to give the first one is the name I'm going to say car one name. 04:48.050 --> 04:52.850 Then the name of this car is going to say this is a Toyota. 04:54.800 --> 04:57.320 So you can model anything right in here. 04:57.350 --> 05:01.970 Then the next one is it's going to gonna see. 05:01.970 --> 05:05.870 The next one is to one. 05:07.880 --> 05:09.140 Is the year. 05:11.510 --> 05:15.170 And let this year be equal to. 05:15.500 --> 05:17.450 We have our 20. 05:19.460 --> 05:20.570 2030 model. 05:21.050 --> 05:21.410 Right. 05:21.410 --> 05:25.370 So depending on the time you're taking this it might have come out by then. 05:25.400 --> 05:32.420 Then the next one is a the next attribute we have like right in there is a color. 05:33.530 --> 05:37.100 Then let the color be equal to black. 05:37.100 --> 05:40.400 So let's use a color that is a universal. 05:40.430 --> 05:44.660 Now you can go ahead and print out these. 05:44.870 --> 05:51.980 We have created the object of this car which is this which we have right here, the new car okay. 05:52.010 --> 06:00.830 Now what we need to do now is we go ahead and print out these. 06:00.860 --> 06:03.340 For me to do that, to go ahead and say echo. 06:03.370 --> 06:04.810 And there are Korhonen. 06:04.840 --> 06:05.230 See? 06:08.380 --> 06:12.640 Go ahead and say car one. 06:13.570 --> 06:17.680 And then you print out any of the attributes which you want to print out. 06:17.680 --> 06:23.440 Maybe if it is, the name can go ahead and say the name and a semicolon at the end. 06:23.440 --> 06:26.140 And if I refresh this we have Toyota. 06:26.710 --> 06:33.550 You can see that now if you want to print out the year it's going to say the year. 06:33.640 --> 06:37.720 And then go ahead and save this and print this out 2030. 06:39.310 --> 06:43.630 If you are dealing with the color you can go ahead and say color. 06:43.720 --> 06:46.570 And then that is black. 06:46.600 --> 06:50.890 Now you can create so many of these objects of this car. 06:50.920 --> 06:53.410 Now you can go ahead and create a car too. 06:54.100 --> 07:00.850 Let's go ahead and see that car two is equal to new. 07:03.870 --> 07:04.800 New car. 07:05.220 --> 07:08.250 So K2 is equal to a new car with a semicolon at the end. 07:08.250 --> 07:16.560 And then we go ahead and copy everything we have here so we can just, uh, just say, uh, edit that. 07:16.590 --> 07:22.410 Now go ahead and change this to .2.2. 07:22.440 --> 07:23.100 All right. 07:24.810 --> 07:30.690 So change this as well to dot two and change this to cart two. 07:31.590 --> 07:35.820 So I mean the next car should be like uh named as Nissan. 07:36.660 --> 07:47.550 Then maybe this is a in the year 2070 and then color the equal to white. 07:50.760 --> 07:52.710 Now let's go ahead and save this. 07:53.130 --> 07:59.100 So for us to do that just go ahead and say equal to or sorry this is car two. 07:59.130 --> 08:02.760 And if we check the color check out and that is white. 08:03.120 --> 08:06.900 So in this way you can be able to create your own custom data type. 08:06.900 --> 08:13.410 And there you go ahead and model it by creating a class, creating an object which is the instance of 08:13.410 --> 08:14.190 the class. 08:14.190 --> 08:19.590 And then we can be able to break or use the attributes to do whatever you want. 08:19.620 --> 08:26.820 So I want to look more into the classes and the the object oriented programming as you move into this 08:27.180 --> 08:28.080 class. 08:28.290 --> 08:37.050 So for had I checked out this and know that the classes are custom data types which you create and the 08:37.050 --> 08:43.740 objects are instance of the class which you create, which is the abstract car which you are creating 08:43.740 --> 08:43.950 here. 08:43.950 --> 08:46.440 So you can model anything you want right in here. 08:46.440 --> 08:49.830 And then you go ahead and check it out. 08:49.830 --> 08:51.270 So play around with it. 08:51.270 --> 08:55.200 And if you have any questions under this use the question and answer section. 08:55.200 --> 08:58.110 And I'm going to get back to you as soon as possible. 08:58.140 --> 08:59.190 Thank you so much. 08:59.190 --> 09:02.700 And I'm going to see you in the next video lecture.