If Statements Video Lecture | PHP for beginners - Software Development

hello YouTube welcome to the ninth
tutorial in the PHP programming series
and in this video we're going to cover
the if statement and so far you know
what we learned all we've learned how to
do is say some say a piece of text to
your browser and add up some stuff but
now we're going to look at the things
that make programming so you know more
dynamic and how to make PHP scripts more
dynamic and can you know will you
reflect on what the user actually wants
to do I'm going to do this through an if
statement and an if statement is it
basically makes your decision in real
time like the values that go into the if
statement can be edited but the it just
makes a decision on whether to do
something or not do something and we're
just going to go into it right now so
what you need to do is put your
obviously we're going to make our PHP
file first starting and ending tag for a
PHP file I'm going to call this if dot
PHP nice and easy to type and okay so
we're going to jump straight into it and
the first thing we'll do is create a
variable so that name equals chris is
going to be the variable and the make an
if statement it's quite simple to type
it starts off obviously with if and
after that we need our conditions so
what this is saying is if and then we'll
have a condition and if that condition
is true then we can choose a code to be
executed so what we need to do is put
some brackets and inside of these
brackets is the condition so the
condition goes here and what our
condition is going to be is if name and
we're going to use office comparison
operator here the equals equals now what
this does is compares one thing to
another then that's saying if this
equals and then let's type Chris here
that's saying if name is equal to Chris
and you might be saying why can't we
type it like like this if
equals Chris or if you remember our
variable tutorial this is this operator
will assign things call the assignment
operator this will assign a value to a
variable so we're actually not saying if
name is equal to Chris here we're saying
if and let's go and our name is going to
be assigned Chris so that isn't really
your argument person isn't a condition
so we need to use double equal sign and
if that is true and now we need to
execute the code now people any
experienced programmers might question
this but I'm just going to just use
curly brackets all the time so we need
to put open curly brackets and then down
here we're going to close curly brackets
and what this will do is all code and
close within the start and end of this
will be executed if this condition is
true so what I'm going to do is echo M
hello Chris okay and so if we save this
and we go to F dot PHP and it's going to
say hello Chris but what happens if we
change this to Tom and we load it and
nothing but happen because if we go to
this variable name the value of name is
not equal to Chris so it's not going to
output that so just to you know go back
and see what we've land over this the
way to do an if statement is faced with
the if keyword you type if and then in
normal brackets you're going to type the
condition now this condition needs to be
true for the following codes execute and
after you've typed out your condition in
curly brackets all you need to do is put
the code that will be executed now it is
possible to do this without killing
brackets but I think number one it makes
it a lot neater and it's quite a bad
habit to do because if you want multiple
lines of code to be executed with an if
statements it will cause problems so I'm
just going to suggest to you guys to use
curly brackets or curly braces whatever
you want evarin want to call them these
things and enclose your code inside of
the
so that's the end of this tutorial for f
statements and we can also you know we
can try out another one you say if if
name is equal to Tom and then we'll have
our curly brackets and echo hello Tom
oops Tim there we'll save it and reload
I'm saying hello Tom so that is the end
now so I hope you guys enjoyed the
tutorial so just for a quick summary if
statements are used to make a decision
based on a condition this the condition
goes inside of the brackets and the code
to be executed will be enclosed in curly
brackets after they can after the F and
then condition so you can go and try
that out you can use numbers you know
whatever you want to do so let's just
one more thing we'll do we'll just say
total is equal to 5 plus 1 and then
we're going to say if total is equal to
6 and we'll have killyou brackets here
echo your answer is 6 I'll save and
reload and you'll see that it outputs
your answer 6 so hopefully this is
explained if statements you guys you
understand it now and if you have any
questions just leave a comment on this
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