PHP Tutorial 13 - Arrays (PHP for beginners) Video Lecture | PHP for beginners - Software Development

Oh YouTube welcome to tutorial number 13
in the PHP programming tutorial series
and in this tutorial we're going to
cover the array now basically an array
is just a way to store multiple
variables within one family and today
we're going to learn about the numeric
and associative array so first of all
let's jump straight in let's go to the
numeric array if we just create the PHP
file we'll call this array dot PHP and
we'll excuse me
and the way to the clone array is
similar to create in a variable
now remember when I told you that you
didn't have to specify the data type for
variables in PHP well that is different
with an array you have to declare the
variable type which is an array first so
we're going to call this names it's
going to be on array it's going to
contain some names I'm just going to
call it well you have to cite the array
key word after names and then put some
brackets and inside these brackets you
will specify every member of this array
so you enclose them in quotes so the
first name is going to be Chris and then
have a comma to separate each part of
the array second name is Tom comment and
third name is Bob so what we've done
here is we've created a new variable and
we've specified it is an array and then
in in brackets we've said that the first
member is Chris setting this time a
third is Bob now on to one of the
confusing parts of all programming
languages really with arrays I guess if
you if you look at this and you had no
primary program experience you would
think ok so number one is Chris
number two is Tom number three is Bob
that is wrong with arrays in programming
it starts counting from zero so if we
just put a comment here so that means
that numbers Chris is number zero and
then Tom is number one and Bob is number
two so instead of Chris being number one
chris is actually number zero should
never get that confused
in PHP it will be difficult to
understand at first maybe you might make
a few mistakes but after a while of
using this then you get used to it so
that is one of the fundamentals of
arrays that you must remember so now
we've got that other way let's carry on
we're going to do is tackle is then
tackle I'm getting quite confused and
really tired modes we're going to echo
out names
imma go what we do when we echo out an
array M you need to put the square
brackets and inside the square brackets
you need to give the name of the array
and what we're going to do is put 0
right now because that's that last in
position 0 what's the first one so if we
save that and go to break PHP and this
is air on line three about mr. semicolon
somewhere what have I done
I've done something wrong here so let me
just figure out ok so foxy just figured
out what I've done wrong and it's
actually something really stupid I
didn't put the assignment operator here
so when you cling in array you have to
do the array name then an equal sign and
then type our array and in brackets you
will type out the values to go inside
that array so I apologize for that
mistake it's actually quite you know the
easiest mistake I can make can't believe
it and realize what it was so anyway if
I just say we load that you'll see that
it echoes out Chris as Chris is the
value 0 and then if we change out the 1
reload it tom is the next value ok so
what I'm going to do now is show you
guys how to make an associative array
that was a numeric array and it's
similar to declare you'll this is going
to be called ages and I'm going to give
each name and age so ages equals and I
remember the equal sign sign this time
array and then we'll put our brackets
there and put different when declaring
this is that we don't declare just the
value we also declare the name of the
value so
first value is I think was Chris this is
the name this isn't the value of the
array so Chris enemy put this equals and
then greater than sign and now we type
the value of the array and for this it
is going to be M 18 then we'll have a
comma and then next name was Tom I think
and then I'm going to do equals great
sit down Tom's going to be 20 and then
it was I think Bob equals are greater
than and then he's going to be 16 so now
what let's just save this make sure
there's no errors ok the array is saved
successfully so now to call the array
it's also similar than to call numeric
array or you do is do echo and then you
type the name of the array which is ages
and then the square brackets again but
the only difference is inside of the
square brackets you need to use the name
of the value so if we try name is Chris
save this reload and let's give the age
of 18 so we can just embed that into a
sentence maybe say Chris is and then
concatenate this onto here I'm have ages
with the value of Chris concatenate
again years old and then . forget the
semicolon and then reload it and i'll
say chris is 18 years old and just
before anyone points it out you actually
don't need a semicolon at the end of
your last statement in PHP that's a fun
fact i guess but i would just put one at
the end every time just for go practice
so you'll see it still works so put that
back on okay so let's just try to get
toms age so we'll just change this to
tom is and then we'll find the ages in
the array ages of tom save that and toms
a twenty years old so what we can also
do is print out the contents of an array
and we do that with the print our
function so print
on the score our and then in brackets we
type the name of our array which is ages
and then so if we reload this now it'll
say that Chris 18 Tom 20 Bob 16 now
there's another type of array which I
won't teach in this tutorial maybe in a
further one because I don't want to run
the time over but I hope you guys
enjoyed this tutorial
so just to evaluate to create a numeric
array you will just assign the name of
the array and then the equal sign so you
know don't be a idiot like me forget the
equal sign which is the assignment
operator and then you type the word
array and in bracket I you type each
value of the array and each value will
be enclosed in quotations and separated
but separated by a comma and to call an
array you simply just put the name of
the array so ages and then in square
brackets the numeric value of which
which array you want output but with an
associative array you can actually name
your your array value so give it a name
and then you can just call on that with
the array so thanks for watching this
tutorial if you have any questions
simply leave a comment and yep please
like the video and subscribe to the
channel and also you know give me a
message if you have any questions also
so thanks for watching and goodbye