Difference between revisions of "PHP-and-MySQL/C2/If-Statement/English-timed"

|Welcome to this basic php Spoken Tutorial.  Here we will discuss the 'IF' statement.

|If you have written code before, you would have come across the 'IF' statement.

|Its not much different in php.  I'll execute one shortly and show you.

|Okay, here is a brief about the 'IF' statement. It takes a condition.  

|If the condition is True, it executes one path of code.

|If it is False, it will execute another path of code.

|If - inside the bracket is the condition to know whether 1 equals 1.  

|Notice I am using a double 'equal to' sign here.  This is the comparison operator.

|In another tutorial we're going to learn about operators.

|It reads as 'is equal to' though it is not the same as 'equals'

|When we're using variables, when we want to compare, we use 'double equal to'.

|If its 'Not True', we'll say 'else'.

|The same structure - so two curly brackets.

|For example, if 1 equals 1 we say echo 'True'.

|If 1 is not equal 1, what we should get when we run our file is False.

|Since 1 is equal to 1 what we get when we run our file is True

|Let us change this, if 1 equals 2, which it doesn't, then we'll get False.

|So we would have already created a simple program to tell us if one number equals another.

|So I will just add something more.  I'll create a little program for a password access.

|Say the password is abc.

|I am going to incorporate a variable into my IF function by saying  

|If password, remember double equals 'def'

|And I'll say 'Access granted'

|So if it doesn't equal 'def', I'll say 'Access denied'.

|We're going to compare the password to 'def', which is the stored password.  

|If this equals 'def', we're going to say 'Access granted' else 'Access denied'.

|Lets try this.

|'Access denied'.  This is because the passwords do not match.

|Change this to 'def' and we'll get 'Access granted'.

|To me that looks a lot neater.

|Please note - there is no point in adding curly brackets if you have only one line of code for simple IF statements like these.

|For example, lets set a new variable here.

|Access equals 'Allowed'

|It says an unexpected T_else on line 8

|Lets find line 8.  Its here. The line before it is causing a problem.

|We refresh this and Access is granted.

|Now I've set a new variable,  access to be allowed.

|This is Madhu dubbing for the Spoken Tutorial Project. Thanks for watching. Bye.