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

|Hello and welcome to the tutorial on Arrays.

|Arrays allow the user to store more than one piece of data inside a variable  

|For example the variable days would be called as an array

|Inside a pair of parenthesis we're going to have more than one value

|I'll have Monday, Tuesday, Wednesday, Thursday and Friday - just 5 days of the week, that saves us

|Say for example day one is Monday, day two is Tuesday and so on.

|Hope you get the picture

|This is a much easier and more efficient way of calling a variable with more than one piece of data inside it

|Please note these can also be numbers, or whatever data that you decide you require inside them.

|Now, to echo out our array, I'm going to say echo days

|This happens when we open up our page

|We just get 'Array' echoed out.

|Now, 'Array' is not anywhere inside here.

|So, what PHP has done is echoed out the fact that what we have is an array.

|Now, to call a specific element inside an array, you might want to call it element, in some places they call it id tags or elements of an array.

|However because of the numbering system, the standard numbering system, we are starting with zero, one, two, three and four.

|So, for example if I wanted to echo out Monday that would be zero, so, you put zero in that and you have Monday echoed out.

|The same with one would be Tuesday and four, which is the last element of the array, would be Friday.

|Okay, so, we're going to go ahead and I'm going to show you how to assign values in a different way into an array

|I'm going to create an array, but I'm going to create its specifically.

|So, days zero equals Monday, days one equals Tuesday

|I mean I could say day 1 equals, you know and day 2 equals, and you could do it like that.

|So you can do it like that.I always prefer to do it like this.

|However if you prefer to view it, I mean if I save this now, refresh, nothing's changed.

|There are no errors, we still get the same structure, we've just moved it down on lines

|There's the line terminator at the end of your function and not at the end of every line, so, don't get confused with that.

|Okay, so, let's now go back to this.

|So, that's the basic array and how to create values for it in two different ways and how to call values for it.

|So, for example if I was saying echo Today is days and then I can say zero.

|Now, you can see already that I've highlighted this in context - I've highlighted that in green

|Now, if you refresh this, you'll see this is Monday.

|What it would look better is - you'll see that when we write it down here we could say echo 'days' and zero, you can see how that's in red to show an integer, a number.

|The way it would like you to write is, like that and we can see that's fine

|But you can incorporate an array into your string in order to echo it out.

|Anyway, I'm going to go on to associative arrays where we're going to assign id tags in a way where we hold a value for each sort of identity.

|If you don't follow then this is the way I'm going to create it.

|I'm going to say ages equals array, now inside, I'm going to say 'Alex'

|Now, instead of going on and saying Billy and then Kyle which are the three names I'm going to use, I'm going to say nineteen, fourteen and eighteen

|Basically using equals and a greater than sign.

|This is now called as 'Alex', this is called as 'Billy' and this is called as 'Kyle' but their values are fourteen, nineteen and eighteen.

|So, really, it would be the same as writing that. Lets get rid of that and calling this as zero, one and two.

|And to make it a bit more friendly, and a bit easier to remember, a bit easier to call, we can now say, echo out 'ages', 'Alex', like that.

|So, this will echo out nineteen, as we refresh and see there - nineteen. The same if you do it with 'Billy' and the same with 'Kyle'.

|So, when you're half way through a program and instead of saying aah I'll have to go back to the top and count along each row and say "Is this zero, one, two or three I can't remember?"

|This is much easier to do. Another useful way of doing this is, if I was to say array one is equal to 'Alex' and then two is equal to 'Billy'.

|We are not starting at zero and then one.  We're starting at one and two, so that we find that is easier to remember.

|Now, we can now say echo, 'ages' one, that comes out as 'Alex'.

|We're not using zero for that, it's a lot more user friendly for you to program than to say, zero, one, two.

|But I mean this to me is quite pointless because I'm in the mood of using zero, one, two.

|But if you want to use it like I have before or like this or assign a string value to any data types then that's the way to do it

|Okay, that's the basics of arrays, I have another tutorial on multidimensional arrays.

|That's all in this tutorial. Thanks for watching.  This is Arvind dubbing for the Spoken Tutorial project. Bye.