Name: PHP - 配列キーの命名 (PHP - Naming Array Keys)
Uploaded: 2021-01-14T10:10:38.000Z
Duration: 8 min 43 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

So let's talk about naming keys in an array.

様態の副詞

And when you create an array, all the values in the array automatically get numeric keys so they get keys that start at zero go.

12345678 And continue up as you add values to the array one the problems are gonna get in the coding world, though, is that a lot of times you get confused with what you're doing.

So if you're tryingto add information to an array or more importantly, if you're trying to delete information from a rich array or modify information from an array keeping track of whether you're supposed to be going for index key, three or four can get confusing.

Because remember, when you're dealing with an array, it automatically starts at zero for the index keys and so you can get confused.

Three, actually key three or is key three actually key four because of or key to, because of how the numbering goes.

And that's one of the ways that you can get into a big problem.

And so what can make life a lot easier is if you just name what the keys are.

Instead of the keys being named a 0123456789 10 you can have the keys be named name and city and profession.

So let's say if this is a C R M software instead of having the Keys B 012345 and you put first name and zero and last name at one you know, email address or whatever.

And three, What you can do is you can simply name the keys and say for key named name.

So then, when you go to modify or when you go to pull information, it's a lot easier to plug in.

That's when the problems that you can run into so let's go over to the computer so I can show you how to name the keys and make your life a hell of a lot easier as a coder.

So this is a simple script that I created.

Cult array keys dot PHP And as always, I opened it up with a P H P tag.

Now, as far as creating this rate, array is concerned there is a new way to created race.

But again, I'm using the old way because this will be most compatible with everybody using almost any version of PHP that they're using.

So there is a different way to create an array.

Niedere looks It's a little bit easier, but this will work for everybody.

So once you're comfortable with this, do a little bit research on the new way of doing it.

But basically all we're doing here again is we're creating a dollar sign info.

So this is the variable that we're going to be creating for this array, and we're going to set a equal to an array with named Kees.

Now what I did here, since White Space doesn't really matter a whole lot in PHP, I separated us out to different lines again to make it easier for me to read.

But if you wanted to put this all on to a single line, you could do that too.

So what we do here is we use the array function.

We do array, we open parentheses and then for the keys.

Now, what we're going to dio is we're going to single quotation mark, whatever you want.

So this is how you name a key, Then what we're going to do is this little equal sign.

It's not really like a comparison operator like we've used before.

So we want this to be that type of deal, eh?

So we just put equal sign the greater sign a greater than symbol and then for the value for this key again we're gonna do is we're going to a single quotation mark.

So here we say, Bob and we close with single quotation mark.

We then end this particular key with a comma.

We then go down here and again for the next key name.

So for this, it's city close Single quotation mark equal, greater than sign.

And then for this here, we're going to say Baltimore single quotation, single quotation Baltimore in the middle And then we have a comma.

Then for the profession against it is like a c r m self where something like that against single quotation, mark profession or whatever you wanna put close single quotation, Mark equal, Greater sign.

Now, do you realize here that again, there's no comment.

And then how we close this out is use the parentheses and you use the comma.

So this Ooh, this is the same as this again.

If you want to put all of this on a single line, you could do that.

Just it was a little bit easier to see Then what we're going to dio is we're going to print out all the information in the array again.

It's the troubleshooting step just to make sure what's in the array is what we think is in the array and to do that for for what we're using now is we're going to use print, underscore our parentheses and then we're just going to plug in info.

The keen air is going to print out the key names and the key values for what's an info so we can verify what's in there is what we think is in there.

Course Semi Colon, that we're going to do it again.

We're just going to separate this out in HD Amounts.

Were gonna print a brake line like we normally d'oh.

Now, when we're going to print a key value out of this array, what we can do is we can use a name.

We can actually use a name of the key value, then a number that we might get confused by so we can say print dollar sign info bracket.

And then for the key name, single quotation mark, whatever the key name is.

So again, this is a lot easier If I want the name.

I plug in name with City of Logan City, want the professional plugging profession I don't have to sit there ago.

This city, it's, you know, a city one or city two or maybe cities through.

You know, you don't get confused, just plug in name, and that's all it is again.

Then when you go to run this and they're ago.

So this prints out print our gives us this.

And in there we have Bob the second KIIS city.

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PHP - 配列キーの命名 (PHP - Naming Array Keys)

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