Pravin1389: moved PHP-and-MySQL/C2/Arrays /English to PHP-and-MySQL/C2/Arrays/English

2012-12-01T13:31:44Z

moved PHP-and-MySQL/C2/Arrays /English to PHP-and-MySQL/C2/Arrays/English

Chandrika: Created page with '{|Border=1 !Time !Narration |- |0:00 |Hello and welcome to the tutorial on Arrays. |- |0:03 |Arrays allow the user to store more than one piece of data inside a variable |- |0:0…'

2012-11-29T06:33:20Z

Created page with '{|Border=1 !Time !Narration |- |0:00 |Hello and welcome to the tutorial on Arrays. |- |0:03 |Arrays allow the user to store more than one piece of data inside a variable |- |0:0…'

New page

{|Border=1
!Time
!Narration
|-
|0:00
|Hello and welcome to the tutorial on Arrays.
|-
|0:03
|Arrays allow the user to store more than one piece of data inside a variable
|-
|0:08
|For example the variable days would be called as an array
|-
|0:12
|Inside a pair of parenthesis we're going to have more than one value
|-
|0:18
|So, I'll pick 5 values for this and have every day of the week inside each of these.
|-
|0:22
|I'll have Monday, Tuesday, Wednesday, Thursday and Friday - just 5 days of the week, that saves us
|-
|0:39
|Say for example day one is Monday, day two is Tuesday and so on.
|-
|0:49
|Hope you get the picture
|-
|0:51
|This is a much easier and more efficient way of calling a variable with more more than one piece of data inside it
|-
|00:59
|Please note these can also be numbers, or whatever data that you decide you require inside them.
|-
|1:06
|Now, to echo out our array, I'm going to say echo days
|-
|1:11
|Now, you find that this doesn't work.
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|1:15
|This is what happens when we open up our page
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|1:19
|We just get 'Array' echoed out.
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|1:22
|Now, 'Array' is not anywhere inside here.
|-
|1:24
|So, what PHP has done is echoed out the fact that what we have is an array.
|-
|1:30
|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.
|-
|1:41
|We're going to use square brackets and we'll call the position of the element inside the array.
|-
|1:45
|So, you may think this is one, two, three, four, five.
|-
|1:49
|However because of the numbering system, the standard numbering system, we are starting with zero, one, two, three and four.
|-
|1:57
|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.
|-
|2:06
|The same with one would be Tuesday and four, which is the last element in the array, would be Friday.
|-
|2:18
|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
|-
|2:26
|Now, let me start from the beginning of what I want to say.
|-
|2:29
|I'm going to create an array, but I'm going to create it specifically.
|-
|2:37
|So, days zero equals Monday, days one equals Tuesday
|-
|2:52
|Now, you may think - what's the point of this? I mean, what I'm doing here essentially is creating what I said earlier would be bit of a hassle.
|-
|3:04
|I mean I could say day 1 equals, you know and day 2 equals, and you could do it like that.
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|3:14
|However, what we're still doing here is putting into an array.
|-
|3:19
|So, it may still contain the same structure but we're assigning it in a different way.
|-
|3:24
|So you can do it like that. Let me get rid of this. I always prefer to do it like this.
|-
|3:32
|I find this much cleaner, much simpler and just to let you know - you can bring this down like this.
|-
|3:43
|However if you prefer to view it, I mean if I, sorry, I'll redo that.
|-
|3:49
|If I save this now, refresh, nothing's changed.
|-
|3:53
|There are no errors, we still get the same structure, we've just moved it down on lines
|-
|4:00
|There's the line terminator at the end of your function and not at the the end of every line, so, don't get confused with that.
|-
|4:09
|Okay, so, let's now go back to this.
|-
|4:14
|Okay, so, that's the basic array and how to create values for it in two different ways and how to call values for it.
|-
|4:22
|So, for example if I was saying echo Today is days and then I can say zero.
|-
|4:33
|Now, you can see already that I've highlighted this in context - I've highlighted that in green
|-
|4:41
|Now, if you refresh this, you'll see this is Monday.
|-
|4:44
|Now don't get confused, I do recommend you to use contexts.
|-
|4:48
|However, this isn't the standard way that contact recognizes the coding.
|-
|4:53
|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.
|-
|5:08
|The way it would like you to write is, like that and we can see that's fine
|-
|5:15
|But you can incorporate an array into your string in order to echo it out.
|-
|5:22
|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...how can I describe that value for each sort of identity.
|-
|5:36
|If you don't follow then this is the way I'm going to create it.
|-
|5:40
|I'm going to say ages equals array, now inside, I'm going to say 'Alex'
|-
|6:03
|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
|-
|6:16
|Basically using equals and greater than sign.
|-
|6:24
|Now, what this is done is instead of our array elements as in this being called by zero, this being called by one, this being called by two.
|-
|6:34
|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.
|-
|6:44
|So, really, it would be the same as writing that. Lets get rid of that and calling this as zero, one and two.
|-
|6:54
|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.
|-
|7:05
|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'.
|-
|7:22
|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?"
|-
|7:38
|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'.
|-
|7:50
|We are not starting at zero and then one. We're starting at one and two, so that you find that is easier to remember.
|-
|8:00
|So, we can now say echo, 'ages' one, that comes out as 'Alex'.
|-
|8:07
|We're not using zero for that, it's a lot more user friendly for you to program than to say, zero, one, two.
|-
|8:16
|Try it out - work around it - see what's easiest for you.
|-
|8:21
|But I mean this to me is quite pointless because I'm in the mood of using zero, one, two.
|-
|8:27
|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
|-
|8:36
|Okay, that's the basics of arrays, I have another tutorial on multidimensional arrays.
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|8:44
|Its a separate tutorial. Please watch it.
|-
|8:47
|That's all in this tutorial. Thanks for watching. This is Arvind dubbing for the Spoken Tutorial project. Bye.

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PHP-and-MySQL/C2/Arrays/English - Revision history

Pravin1389: moved PHP-and-MySQL/C2/Arrays /English to PHP-and-MySQL/C2/Arrays/English

Chandrika: Created page with '{|Border=1 !Time !Narration |- |0:00 |Hello and welcome to the tutorial on Arrays. |- |0:03 |Arrays allow the user to store more than one piece of data inside a variable |- |0:0…'