PHP-and-MySQL/C2/If-Statement/English-timed

Time	Narration
0:0	Welcome to this basic php Spoken Tutorial. Here we will discuss the 'IF' statement.
0:06	If you have written code before, you would have come across the 'IF' statement
0:11	Its not much different in php. I'll execute one shortly and show you
0:16	So, let us start.
0:18	Okay, here is a brief about the 'IF' statement. It takes a condition.
0:23	If the condition is True, it executes one path of code.
0:28	If it is False, it will execute another path of code.
0:32	For example - this is the structure.
0:36	If - inside the bracket is the condition to know whether 1 equals 1.
0:41	Notice I am using a double equal to sign here. This is the comparison operator.
0:47	In another tutorial we're going to learn about operators.
0:50	It reads as 'is equal to' though it is not the same as 'equals'
0:56	When we're using variables, when we want to compare, we use double equal to.
1:02	If you are going for the True path, you can use two curly brackets.
1:06	We're going to open one here.
1:08	Our code will go in between the brackets.
1:12	If its Not True, we'll say else.
1:15	The same structure - so two curly brackets.
1:17	For example, if 1 equals 1 we say echo True.
1:23	If 1 is not equal 1, what we should get when we run our file is False.
1:30	Since 1 is equal to 1 what we get when we run our file is True
1:36	Let us change this, if 1 equals 2, which it doesn't, then we'll get False.
1:42	So we would have already created a simple program to tell us if one number equals another.
1:49	This is quite a silly application for a program.
1:52	So I will just add something more. I'll create a little program for a password access.
1:58	We are going to store the password in a variable here.
2:03	Say the password is abc.
2:05	I am going to incorporate a variable into my IF function by saying
2:11	If password, remember double equals 'def'
2:15	And I'll say 'Access granted'
2:21	Sorry, I made a mistake. 'def' is the password we want to ask the user for. 'abc' is the password I'm inputting to the system.
2:32	So if it doesn't equal 'def', I'll say 'Access denied'.
2:39	The password that I've inputted is 'abc'.
2:42	We're going to compare the password to 'def', which is the stored password.
2:50	If this equals 'def', we're going to say 'Access granted' else 'Access denied'.
2:57	Lets try this.
3:00	'Access denied'. This is because the passwords do not match.
3:05	On this basis, you can see here that I've incorporated a variable.
3:10	Change this to 'def' and we'll get 'Access granted'.
3:18	Because I have one line of code here and another one line of code here.
3:22	I can get rid of these curly brackets.
3:25	To me that looks a lot neater.
3:29	Please note - there is no point in adding curly brackets if you have only one line of code for simple IF statements like these.
3:37	If you're going to have a line after line here, you'll need the curly brackets.
3:42	For example, lets set a new variable here.
3:46	Access equals 'Allowed'
3:52	That's just basically another line of code.
3:57	But when I try and run this, we get an error.
4:02	It says an unexpected T_else on line 8
4:08	Lets find line 8. Its here. The line before it is causing a problem.
4:13	Which is why we need to add our curly brackets back in to cater for two or more lines of code.
4:22	We refresh this and Access is granted.
4:25	Now I've set a new variable, access to be allowed.
4:29	This won't be of much help.
4:32	But I was just giving you an example.
4:35	You can see this is still a single line and these are double lines and you can't mix them up.
4:40	OK, so I've created a variable. I've incorporated it into an IF statement. Hope this was useful.
4:46	This brings us to end of this tutorial.
4:50	This is Madhu dubbing for the Spoken Tutorial Project. Thanks for watching. Bye.

Contributors and Content Editors

Minal, Pratik kamble, Sandhya.np14