Chandrika: Created page with '{| border=1 !Time !Narration |- |0:0 |Welcome to this basic php Spoken Tutorial. Here we will discuss the 'IF' statement. |- |0:05 |If you have written code before, you would …'

2012-11-29T06:29:27Z

Created page with '{| border=1 !Time !Narration |- |0:0 |Welcome to this basic php Spoken Tutorial. Here we will discuss the 'IF' statement. |- |0:05 |If you have written code before, you would …'

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{| border=1
!Time
!Narration
|-
|0:0
|Welcome to this basic php Spoken Tutorial. Here we will discuss the 'IF' statement.
|-
|0:05
|If you have written code before, you would have come across the 'IF' statement
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|0:08
|Its not much different in php. I'll execute one shortly and show you
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|0:14
|So, let us start.
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|0:16
|Okay, here is a brief about the 'IF' statement. It takes a condition.
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|0:20
|If the condition is True, it executes one path of code.
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|0:23
|If it is False, it will execute another path of code.
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|0:27
|For example - this is the structure.
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|0:32
|If - inside the bracket is the condition to know whether 1 equals 1.
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|0:37
|Notice I am using a double equal to sign here. This is the comparison operator.
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|0:42
|In another tutorial we're going to learn about operators.
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|0:46
|It reads as 'is equal to' though it is not the same as 'equals'
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|0:55
|When we're using variables, when we want to compare, we use double equal to.
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|0:58
|If you are going for the True path, you can use two curly brackets.
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|1:02
|We're going to open one here.
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|1:04
|Our code will go in between the brackets.
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|1:07
|If its Not True, we'll say else.
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|1:11
|The same structure - so two curly brackets.
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|1:14
|For example, if 1 equals 1 we say echo True.
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|1:23
|If 1 is not equal 1, what we should get when we run our file is False.
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|1:26
|Since 1 is equal to 1 what we get when we run our file is True
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|1:35
|Let us change this, if 1 equals 2, which it doesn't, then we'll get False.
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|1:41
|So we would have already created a simple program to tell us if one number equals another.
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|1:46
|This is quite a silly application for a program.
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|1:49
|So I will just add something more. I'll create a little program for a password access.
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|1:56
|We are going to store the password in a variable here.
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|2:00
|Say the password is abc.
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|2:05
|I am going to incorporate a variable into my IF function by saying
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|2:11
|If password, remember double equals 'def'
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|2:14
|And I'll say 'Access granted'
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|2:20
|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.
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|2:32
|So if it doesn't equal 'def', I'll say 'Access denied'.
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|2:38
|The password that I've inputted is 'abc'.
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|2:42
|We're going to compare the password to 'def', which is the stored password.
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|2:46
|If this equals 'def', we're going to say 'Access granted' else 'Access denied'.
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|2:54
|Lets try this.
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|2:58
|'Access denied'. This is because the passwords do not match.
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|3:00
|On this basis, you can see here that I've incorporated a variable.
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|3:06
|Change this to 'def' and we'll get 'Access granted'.
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|3:13
|Because I have one line of code here and another one line of code here.
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|3:20
|I can get rid of these curly brackets.
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|3:24
|To me that looks a lot neater.
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|3:27
|Please note - there is no point in adding curly brackets if you have only one line of code for simple IF statements like these.
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|3:34
|If you're going to have line after line here, you'll need the curly brackets.
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|3:39
|For example, lets set a new variable here.
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|3:44
|Access equals 'Allowed'
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|3:50
|That's just basically another line of code.
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|3:55
|But when I try and run this, we get an error.
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|4:00
|It says an unexpected T_else on line 8
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|4:07
|Lets find line 8. Its here. The line before it is causing a problem.
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|4:11
|Which is why we need to add our curly brackets back in to cater for two or more lines of code.
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|4:20
|We refresh this and Access is granted.
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|4:23
|Now I've set a new variable, access to be allowed.
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|4:26
|This won't be of much help.
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|4:29
|But I was just giving you an example.
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|4:31
|You can see this is still a single line and these are double lines and you can't mix them up.
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|4:37
|OK, so I've created a variable. I've incorporated it into an IF statement. Hope this was useful.
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|4:42
|This brings us to end of this tutorial.
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|4:45
|This is Mad Madhur dubbing for the Spoken Tutorial Project. Thanks for watching. Bye.

PHP-and-MySQL/C2/If-Statement/English - Revision history

Chandrika: Created page with '{| border=1 !Time !Narration |- |0:0 |Welcome to this basic php Spoken Tutorial. Here we will discuss the 'IF' statement. |- |0:05 |If you have written code before, you would …'