Difference between revisions of "PHP-and-MySQL/C2/Variables-in-PHP/English-timed"
From Script | Spoken-Tutorial
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| − | + | |'''Time''' | |
| − | + | |'''Narration''' | |
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| − | | | + | |00:00 |
|Welcome to a basic tutorial on PHP variables. | |Welcome to a basic tutorial on PHP variables. | ||
|- | |- | ||
| − | | | + | |00:04 |
|Let me quickly go through a few things first. | |Let me quickly go through a few things first. | ||
|- | |- | ||
| − | | | + | |00:07 |
|PHP variables are very easy to use; I'm sure you'll understand them straight away. | |PHP variables are very easy to use; I'm sure you'll understand them straight away. | ||
|- | |- | ||
| − | | | + | |00:14 |
|You don't need to declare them and they're quite easy to write. | |You don't need to declare them and they're quite easy to write. | ||
|- | |- | ||
| − | | | + | |00:18 |
|You can add a value to a variable half way through the script. | |You can add a value to a variable half way through the script. | ||
|- | |- | ||
| − | | | + | |00:23 |
|Also, they automatically convert to the data type you require. | |Also, they automatically convert to the data type you require. | ||
|- | |- | ||
| − | | | + | |00:28 |
|So there's no need to declare them in a different way each time, or create a value for them each time. | |So there's no need to declare them in a different way each time, or create a value for them each time. | ||
|- | |- | ||
| − | | | + | |00:36 |
|So, for example, let's create our PHP tags here and our content goes in between. | |So, for example, let's create our PHP tags here and our content goes in between. | ||
|- | |- | ||
| − | | | + | |00:41 |
|Okay. Now we start with the dollar sign and then we have our variable name. | |Okay. Now we start with the dollar sign and then we have our variable name. | ||
|- | |- | ||
| − | | | + | |00:48 |
|Please note that you can't start with a "number". So I can't start with a '1'. | |Please note that you can't start with a "number". So I can't start with a '1'. | ||
|- | |- | ||
| − | | | + | |00:53 |
|What I can start with is an "underscore" or a "letter". | |What I can start with is an "underscore" or a "letter". | ||
|- | |- | ||
| − | | | + | |00:57 |
|No other special characters are allowed except underscores, letters and numbers, as long as it doesn't start with a number. | |No other special characters are allowed except underscores, letters and numbers, as long as it doesn't start with a number. | ||
|- | |- | ||
| − | | | + | |01:06 |
|So that would be perfectly acceptable here. | |So that would be perfectly acceptable here. | ||
|- | |- | ||
| − | | | + | |01:09 |
|Okay, so I'll create a variable called "name" and that's going to be equal to a string value contained within double quotes, just like we used for the "echo" function. | |Okay, so I'll create a variable called "name" and that's going to be equal to a string value contained within double quotes, just like we used for the "echo" function. | ||
|- | |- | ||
| − | | | + | |01:21 |
|'My name is Alex'. | |'My name is Alex'. | ||
|- | |- | ||
| − | | | + | |01:23 |
|On the next line, we're going to create another variable using a dollar sign, called 'age'. That's going to be equal to '19', without double quotes. | |On the next line, we're going to create another variable using a dollar sign, called 'age'. That's going to be equal to '19', without double quotes. | ||
|- | |- | ||
| − | | | + | |01:33 |
|Now the reason for this is that this is an integer. | |Now the reason for this is that this is an integer. | ||
|- | |- | ||
| − | | | + | |01:36 |
|You can use it for decimal values as well. So this could be '19.5' or nineteen and a half. | |You can use it for decimal values as well. So this could be '19.5' or nineteen and a half. | ||
|- | |- | ||
| − | | | + | |01:43 |
|That would also automatically convert this into a decimal. | |That would also automatically convert this into a decimal. | ||
|- | |- | ||
| − | | | + | |01:48 |
|However, at the moment it's just an integer. That's how I want it - the variable 'name' is a string and the variable 'age' is an integer. | |However, at the moment it's just an integer. That's how I want it - the variable 'name' is a string and the variable 'age' is an integer. | ||
|- | |- | ||
| − | | | + | |01:57 |
|So let's try echoing these out. | |So let's try echoing these out. | ||
|- | |- | ||
| − | | | + | |02:00 |
|What we need is "echo" and the variable name, not forgetting your line terminator. | |What we need is "echo" and the variable name, not forgetting your line terminator. | ||
|- | |- | ||
| − | | | + | |02:06 |
|Okay, let's find our file named "variables". | |Okay, let's find our file named "variables". | ||
|- | |- | ||
| − | | | + | |02:11 |
|Okay, "Alex" has been echoed out, just like I've said here, "echo name". | |Okay, "Alex" has been echoed out, just like I've said here, "echo name". | ||
|- | |- | ||
| − | | | + | |02:16 |
|Let's try and echo out my age now. | |Let's try and echo out my age now. | ||
|- | |- | ||
| − | | | + | |02:19 |
|It's just an integer variable and that's been echoed out here. | |It's just an integer variable and that's been echoed out here. | ||
|- | |- | ||
| − | | | + | |02:24 |
|Okay so, the thing with variables is that they're very easy to concatenate into a string. | |Okay so, the thing with variables is that they're very easy to concatenate into a string. | ||
|- | |- | ||
| − | | | + | |02:30 |
|In fact, probably, concatenation is the wrong word – they're very easy to include inside your string. | |In fact, probably, concatenation is the wrong word – they're very easy to include inside your string. | ||
|- | |- | ||
| − | | | + | |02:37 |
|If you don't know what concatenation is, it just means to join two things together or to join two strings together in a line. | |If you don't know what concatenation is, it just means to join two things together or to join two strings together in a line. | ||
|- | |- | ||
| − | | | + | |02:46 |
|So, an example of concatenation would be, let's see, 'concat' and then I could say, '.' and then 'ination'. | |So, an example of concatenation would be, let's see, 'concat' and then I could say, '.' and then 'ination'. | ||
|- | |- | ||
| − | | | + | |02:56 |
|Now, this would echo out 'concatination'. | |Now, this would echo out 'concatination'. | ||
|- | |- | ||
| − | | | + | |02:59 |
|Let's try this. Okay? | |Let's try this. Okay? | ||
|- | |- | ||
| − | | | + | |03:03 |
|But there is a completely different tutorial on that. So, what I'll say is, for now, you don't need to include this as one of your variables when you're echoing it out. | |But there is a completely different tutorial on that. So, what I'll say is, for now, you don't need to include this as one of your variables when you're echoing it out. | ||
|- | |- | ||
| − | | | + | |03:14 |
|If you can't follow this, don't worry. This is very, very simple. | |If you can't follow this, don't worry. This is very, very simple. | ||
|- | |- | ||
| − | | | + | |03:18 |
|I'll say "My name is" name "and my age is" and put my age down. | |I'll say "My name is" name "and my age is" and put my age down. | ||
|- | |- | ||
| − | | | + | |03:24 |
|Now, it's all in one string, all in one echo, and we've just got 'My name is' – plain text. | |Now, it's all in one string, all in one echo, and we've just got 'My name is' – plain text. | ||
|- | |- | ||
| − | | | + | |03:32 |
|Variable is called. This is put here. And then when age is called, the value for age is put here. | |Variable is called. This is put here. And then when age is called, the value for age is put here. | ||
|- | |- | ||
| − | | | + | |03:40 |
|So, we can refresh that and you can see that "My name is Alex". That's our variable. "and my age is 19" and that's our variable. | |So, we can refresh that and you can see that "My name is Alex". That's our variable. "and my age is 19" and that's our variable. | ||
|- | |- | ||
| − | | | + | |03:48 |
|So they're really easy to put into strings. | |So they're really easy to put into strings. | ||
|- | |- | ||
| − | | | + | |03:52 |
|Okay, this is all you really need to know about variables. | |Okay, this is all you really need to know about variables. | ||
|- | |- | ||
| − | | | + | |03:56 |
|There are other types of variables, like boolean, decimal – which I've shown you, for example like '19.5'. | |There are other types of variables, like boolean, decimal – which I've shown you, for example like '19.5'. | ||
|- | |- | ||
| − | | | + | |04:06 |
|You would declare them in the same way, with a dollar sign. | |You would declare them in the same way, with a dollar sign. | ||
|- | |- | ||
| − | | | + | |04:10 |
|So practice this and you can come back and learn some more advanced functionality later on, when I'm going through some other projects. | |So practice this and you can come back and learn some more advanced functionality later on, when I'm going through some other projects. | ||
|- | |- | ||
| − | | | + | |04:19 |
|Thanks for watching! This is Joshua Mathew dubbing for the Spoken Tutorial project. (Script contributed by Bhavini Pant). | |Thanks for watching! This is Joshua Mathew dubbing for the Spoken Tutorial project. (Script contributed by Bhavini Pant). | ||
Revision as of 10:59, 10 July 2014
| Time | Narration |
| 00:00 | Welcome to a basic tutorial on PHP variables. |
| 00:04 | Let me quickly go through a few things first. |
| 00:07 | PHP variables are very easy to use; I'm sure you'll understand them straight away. |
| 00:14 | You don't need to declare them and they're quite easy to write. |
| 00:18 | You can add a value to a variable half way through the script. |
| 00:23 | Also, they automatically convert to the data type you require. |
| 00:28 | So there's no need to declare them in a different way each time, or create a value for them each time. |
| 00:36 | So, for example, let's create our PHP tags here and our content goes in between. |
| 00:41 | Okay. Now we start with the dollar sign and then we have our variable name. |
| 00:48 | Please note that you can't start with a "number". So I can't start with a '1'. |
| 00:53 | What I can start with is an "underscore" or a "letter". |
| 00:57 | No other special characters are allowed except underscores, letters and numbers, as long as it doesn't start with a number. |
| 01:06 | So that would be perfectly acceptable here. |
| 01:09 | Okay, so I'll create a variable called "name" and that's going to be equal to a string value contained within double quotes, just like we used for the "echo" function. |
| 01:21 | 'My name is Alex'. |
| 01:23 | On the next line, we're going to create another variable using a dollar sign, called 'age'. That's going to be equal to '19', without double quotes. |
| 01:33 | Now the reason for this is that this is an integer. |
| 01:36 | You can use it for decimal values as well. So this could be '19.5' or nineteen and a half. |
| 01:43 | That would also automatically convert this into a decimal. |
| 01:48 | However, at the moment it's just an integer. That's how I want it - the variable 'name' is a string and the variable 'age' is an integer. |
| 01:57 | So let's try echoing these out. |
| 02:00 | What we need is "echo" and the variable name, not forgetting your line terminator. |
| 02:06 | Okay, let's find our file named "variables". |
| 02:11 | Okay, "Alex" has been echoed out, just like I've said here, "echo name". |
| 02:16 | Let's try and echo out my age now. |
| 02:19 | It's just an integer variable and that's been echoed out here. |
| 02:24 | Okay so, the thing with variables is that they're very easy to concatenate into a string. |
| 02:30 | In fact, probably, concatenation is the wrong word – they're very easy to include inside your string. |
| 02:37 | If you don't know what concatenation is, it just means to join two things together or to join two strings together in a line. |
| 02:46 | So, an example of concatenation would be, let's see, 'concat' and then I could say, '.' and then 'ination'. |
| 02:56 | Now, this would echo out 'concatination'. |
| 02:59 | Let's try this. Okay? |
| 03:03 | But there is a completely different tutorial on that. So, what I'll say is, for now, you don't need to include this as one of your variables when you're echoing it out. |
| 03:14 | If you can't follow this, don't worry. This is very, very simple. |
| 03:18 | I'll say "My name is" name "and my age is" and put my age down. |
| 03:24 | Now, it's all in one string, all in one echo, and we've just got 'My name is' – plain text. |
| 03:32 | Variable is called. This is put here. And then when age is called, the value for age is put here. |
| 03:40 | So, we can refresh that and you can see that "My name is Alex". That's our variable. "and my age is 19" and that's our variable. |
| 03:48 | So they're really easy to put into strings. |
| 03:52 | Okay, this is all you really need to know about variables. |
| 03:56 | There are other types of variables, like boolean, decimal – which I've shown you, for example like '19.5'. |
| 04:06 | You would declare them in the same way, with a dollar sign. |
| 04:10 | So practice this and you can come back and learn some more advanced functionality later on, when I'm going through some other projects. |
| 04:19 | Thanks for watching! This is Joshua Mathew dubbing for the Spoken Tutorial project. (Script contributed by Bhavini Pant). |
