Difference between revisions of "PHP-and-MySQL/C4/Cookies-Part-1/English-timed"
From Script | Spoken-Tutorial
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| − | + | |'''Time''' | |
| − | + | |'''Narration''' | |
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| − | | | + | |00:00 |
|Welcome to this tutorial on php cookies. | |Welcome to this tutorial on php cookies. | ||
|- | |- | ||
| − | | | + | |00:04 |
|Cookies are a very important part when creating special websites where you store information about a user. | |Cookies are a very important part when creating special websites where you store information about a user. | ||
|- | |- | ||
| − | | | + | |00:11 |
|The definition of a cookie is a set of data stored on your computer or the user's computer by the web server. | |The definition of a cookie is a set of data stored on your computer or the user's computer by the web server. | ||
|- | |- | ||
| − | | | + | |00:18 |
|This means, that when we go to a website, our details are stored and are used when we visit it again, provided we select an option like 'Remember me'. | |This means, that when we go to a website, our details are stored and are used when we visit it again, provided we select an option like 'Remember me'. | ||
|- | |- | ||
| − | | | + | |00:30 |
|So you don't have to keep logging in. | |So you don't have to keep logging in. | ||
|- | |- | ||
| − | | | + | |00:32 |
|But if you didn't check a button like 'remember me', you will probably be dealing with sessions which close as soon as the user closes the browser. | |But if you didn't check a button like 'remember me', you will probably be dealing with sessions which close as soon as the user closes the browser. | ||
|- | |- | ||
| − | | | + | |00:42 |
|So sessions are killed straight away however cookies are stored for later use. | |So sessions are killed straight away however cookies are stored for later use. | ||
|- | |- | ||
| − | | | + | |00:50 |
|So lets begin right away and see how to create a cookie. | |So lets begin right away and see how to create a cookie. | ||
|- | |- | ||
| − | | | + | |00:53 |
|You do this by using the setcookie function. | |You do this by using the setcookie function. | ||
|- | |- | ||
| − | | | + | |00:55 |
|The function takes 5 parameters but I will use just 3. | |The function takes 5 parameters but I will use just 3. | ||
|- | |- | ||
| − | | | + | |01:00 |
|The first vital one I will use is the name of the cookie which I will set to 'name'. | |The first vital one I will use is the name of the cookie which I will set to 'name'. | ||
|- | |- | ||
| − | | | + | |01:05 |
|The second one is the data that needs to be stored inside this cookie and I'll type Alex here. | |The second one is the data that needs to be stored inside this cookie and I'll type Alex here. | ||
|- | |- | ||
| − | | | + | |01:12 |
|Now the next one's a bit more tricky. | |Now the next one's a bit more tricky. | ||
|- | |- | ||
| − | | | + | |01:15 |
|Its the time in which it expires. | |Its the time in which it expires. | ||
|- | |- | ||
| − | | | + | |01:18 |
|Now this needs to be set in seconds. | |Now this needs to be set in seconds. | ||
|- | |- | ||
| − | | | + | |01:21 |
|And to represent this I am going to create a variable called 'exp' for expire and this will be equal to the time. | |And to represent this I am going to create a variable called 'exp' for expire and this will be equal to the time. | ||
|- | |- | ||
| − | | | + | |01:28 |
|Let me add some value here. | |Let me add some value here. | ||
|- | |- | ||
| − | | | + | |01:31 |
|At the moment I am adding zero. | |At the moment I am adding zero. | ||
|- | |- | ||
| − | | | + | |01:33 |
|So if I echo this out and get rid of this cookie function for now. | |So if I echo this out and get rid of this cookie function for now. | ||
|- | |- | ||
| − | | | + | |01:39 |
|I'm just echoing out the time here just to show you what it does. | |I'm just echoing out the time here just to show you what it does. | ||
|- | |- | ||
| − | | | + | |01:43 |
|So lets refresh. So you can see quite a lot of digits here. | |So lets refresh. So you can see quite a lot of digits here. | ||
|- | |- | ||
| − | | | + | |01:47 |
|Now this is the unique time-stamp. | |Now this is the unique time-stamp. | ||
|- | |- | ||
| − | | | + | |01:50 |
|And the unique time-stamp is the number of seconds before January the 1st 1970. | |And the unique time-stamp is the number of seconds before January the 1st 1970. | ||
|- | |- | ||
| − | | | + | |01:56 |
|So January the 1st at 12 am ummmm...... in the year 1970. | |So January the 1st at 12 am ummmm...... in the year 1970. | ||
|- | |- | ||
| − | | | + | |02:02 |
|So you can see it here - I think the number of seconds in here equates to a date in the future. | |So you can see it here - I think the number of seconds in here equates to a date in the future. | ||
|- | |- | ||
| − | | | + | |02:10 |
|So for example, at this moment you can see this 88, now 89 and as I keep refreshing, by every second this increases. | |So for example, at this moment you can see this 88, now 89 and as I keep refreshing, by every second this increases. | ||
|- | |- | ||
| − | | | + | |02:20 |
|So yes, this is quite useful way of adding a specific value here. | |So yes, this is quite useful way of adding a specific value here. | ||
|- | |- | ||
| − | | | + | |02:28 |
|Now we need to find out the time in seconds of a day because I want this cookie to expire in a day. | |Now we need to find out the time in seconds of a day because I want this cookie to expire in a day. | ||
|- | |- | ||
| − | | | + | |02:34 |
|So I multiply 24 by 60 to get the number of minutes in a day. | |So I multiply 24 by 60 to get the number of minutes in a day. | ||
|- | |- | ||
| − | | | + | |02:39 |
|And then multiply the answer by 60 to get the number of seconds in a day which is 86,400. | |And then multiply the answer by 60 to get the number of seconds in a day which is 86,400. | ||
|- | |- | ||
| − | | | + | |02:47 |
|So if I replace zero with 86400, we have the variable "expire" that now holds the time in the future by a day. | |So if I replace zero with 86400, we have the variable "expire" that now holds the time in the future by a day. | ||
|- | |- | ||
| − | | | + | |02:56 |
|To save time, I am copying this and I will add my expire variable here. | |To save time, I am copying this and I will add my expire variable here. | ||
|- | |- | ||
| − | | | + | |03:02 |
|So this function will set our cookie called 'name' with a value of 'Alex' and it will expire in a day - read in seconds using the time function here. | |So this function will set our cookie called 'name' with a value of 'Alex' and it will expire in a day - read in seconds using the time function here. | ||
|- | |- | ||
| − | | | + | |03:13 |
|So lets refresh this page and hey! we can see we have no errors which means it has worked. | |So lets refresh this page and hey! we can see we have no errors which means it has worked. | ||
|- | |- | ||
| − | | | + | |03:19 |
|Now what I'll do is I'll use block commenting to comment out all of these. | |Now what I'll do is I'll use block commenting to comment out all of these. | ||
|- | |- | ||
| − | | | + | |03:23 |
|And below this I'll echo out this cookie. | |And below this I'll echo out this cookie. | ||
|- | |- | ||
| − | | | + | |03:26 |
|But the reason I have commented this is because you don't need to set a cookie every time the user comes into the page. | |But the reason I have commented this is because you don't need to set a cookie every time the user comes into the page. | ||
|- | |- | ||
| − | | | + | |03:33 |
|If you are using a log in script and you let the user log into your website, you would need to issue this only once and then the cookie will be stored. | |If you are using a log in script and you let the user log into your website, you would need to issue this only once and then the cookie will be stored. | ||
|- | |- | ||
| − | | | + | |03:41 |
|And you could use it within this time that we have set here. | |And you could use it within this time that we have set here. | ||
|- | |- | ||
| − | | | + | |03:46 |
|So what I'll do is I'll set echo and I'll use a dollar sign, sorry, underscore cookie. | |So what I'll do is I'll set echo and I'll use a dollar sign, sorry, underscore cookie. | ||
|- | |- | ||
| − | | | + | |03:52 |
|Inside here is the name of the cookie so I'll type 'name'. Refresh and you can see 'Alex'. | |Inside here is the name of the cookie so I'll type 'name'. Refresh and you can see 'Alex'. | ||
|- | |- | ||
| − | | | + | |03:59 |
|You can check it out. Even if I close my browser, restart my computer and came back into this page, it will still read Alex because its been stored into the computer. | |You can check it out. Even if I close my browser, restart my computer and came back into this page, it will still read Alex because its been stored into the computer. | ||
|- | |- | ||
| − | | | + | |04:11 |
|Okay now if had to set another cookie, let's say, I set another cookie here and this will be 'age' and my age is 19. | |Okay now if had to set another cookie, let's say, I set another cookie here and this will be 'age' and my age is 19. | ||
|- | |- | ||
| − | | | + | |04:24 |
|And my expiry time I'll just keep as this. | |And my expiry time I'll just keep as this. | ||
|- | |- | ||
| − | | | + | |04:29 |
|So lets just put this up here. | |So lets just put this up here. | ||
|- | |- | ||
| − | | | + | |04:31 |
|We can replace the block commenting with line-comment to keep it neat. | |We can replace the block commenting with line-comment to keep it neat. | ||
|- | |- | ||
| − | | | + | |04:36 |
|So for our expiry time I'll set another cookie in here. | |So for our expiry time I'll set another cookie in here. | ||
|- | |- | ||
| − | | | + | |04:41 |
|And that’ll have the same expiry time. Lets see if I can get it right. | |And that’ll have the same expiry time. Lets see if I can get it right. | ||
|- | |- | ||
| − | | | + | |04:46 |
|Okay so we'll get rid of this. | |Okay so we'll get rid of this. | ||
|- | |- | ||
| − | | | + | |04:48 |
|We’ve set another cookie with the same expiry time. | |We’ve set another cookie with the same expiry time. | ||
|- | |- | ||
| − | | | + | |04:51 |
|Lets refresh. Okay that has been set. | |Lets refresh. Okay that has been set. | ||
|- | |- | ||
| − | | | + | |04:55 |
|So what I'll do is comment this out and here I will echo it out. | |So what I'll do is comment this out and here I will echo it out. | ||
|- | |- | ||
| − | | | + | |05:01 |
|So you see we can set more than one cookie in a page. Lets refresh that and we can get 19. | |So you see we can set more than one cookie in a page. Lets refresh that and we can get 19. | ||
|- | |- | ||
| − | | | + | |05:07 |
|Now we can also set a cookie in a single sentence. | |Now we can also set a cookie in a single sentence. | ||
|- | |- | ||
| − | | | + | |05:11 |
|For that I'll type echo underscore cookie, name and the concatenate "is" and then concatenate my age. | |For that I'll type echo underscore cookie, name and the concatenate "is" and then concatenate my age. | ||
|- | |- | ||
| − | | | + | |05:27 |
|Therefore we will have a sentence saying Alex is 19 just from the cookies that we've stored. | |Therefore we will have a sentence saying Alex is 19 just from the cookies that we've stored. | ||
|- | |- | ||
| − | | | + | |05:34 |
|And again if I close my browser or restart my computer or come back two hours later, this information will still be there stored on this computer ready to be used by this page. | |And again if I close my browser or restart my computer or come back two hours later, this information will still be there stored on this computer ready to be used by this page. | ||
|- | |- | ||
| − | | | + | |05:44 |
|So you can see that they are really very useful to use and really easy to create as well and easy to echo out the user. | |So you can see that they are really very useful to use and really easy to create as well and easy to echo out the user. | ||
|- | |- | ||
| − | | | + | |05:53 |
|Now there's a function we can use called 'print r' or 'print underscore r'. | |Now there's a function we can use called 'print r' or 'print underscore r'. | ||
|- | |- | ||
| − | | | + | |05:58 |
|And we can echo out 'dollar underscore cookie' here. We can align it a bit later... | |And we can echo out 'dollar underscore cookie' here. We can align it a bit later... | ||
|- | |- | ||
| − | | | + | |06:05 |
|Refresh this and you can see we've got an array here and we have a different value. | |Refresh this and you can see we've got an array here and we have a different value. | ||
|- | |- | ||
| − | | | + | |06:12 |
|We have got name and that is equal to Alex and we've got an age which is equal to 19. | |We have got name and that is equal to Alex and we've got an age which is equal to 19. | ||
|- | |- | ||
| − | | | + | |06:22 |
|So these are cookies and they have been set and these are the values of the cookies. | |So these are cookies and they have been set and these are the values of the cookies. | ||
|- | |- | ||
| − | | | + | |06:27 |
|This can be very useful if you want to echo this out to yourself. | |This can be very useful if you want to echo this out to yourself. | ||
|- | |- | ||
| − | | | + | |06:31 |
|Okay now there is another function which I will cover in the second part of this tutorial and I'll use an 'if' statement to find out if a cookie is set or not. | |Okay now there is another function which I will cover in the second part of this tutorial and I'll use an 'if' statement to find out if a cookie is set or not. | ||
|- | |- | ||
| − | | | + | |06:41 |
|And I'll also show you how to unset a cookie. | |And I'll also show you how to unset a cookie. | ||
|- | |- | ||
| − | | | + | |06:45 |
|So join me in part 2 and thanks for watching. This is Evan Varkey dubbing for the Spoken Tutorial Project. Bye. | |So join me in part 2 and thanks for watching. This is Evan Varkey dubbing for the Spoken Tutorial Project. Bye. | ||
Revision as of 12:43, 10 July 2014
| Time | Narration |
| 00:00 | Welcome to this tutorial on php cookies. |
| 00:04 | Cookies are a very important part when creating special websites where you store information about a user. |
| 00:11 | The definition of a cookie is a set of data stored on your computer or the user's computer by the web server. |
| 00:18 | This means, that when we go to a website, our details are stored and are used when we visit it again, provided we select an option like 'Remember me'. |
| 00:30 | So you don't have to keep logging in. |
| 00:32 | But if you didn't check a button like 'remember me', you will probably be dealing with sessions which close as soon as the user closes the browser. |
| 00:42 | So sessions are killed straight away however cookies are stored for later use. |
| 00:50 | So lets begin right away and see how to create a cookie. |
| 00:53 | You do this by using the setcookie function. |
| 00:55 | The function takes 5 parameters but I will use just 3. |
| 01:00 | The first vital one I will use is the name of the cookie which I will set to 'name'. |
| 01:05 | The second one is the data that needs to be stored inside this cookie and I'll type Alex here. |
| 01:12 | Now the next one's a bit more tricky. |
| 01:15 | Its the time in which it expires. |
| 01:18 | Now this needs to be set in seconds. |
| 01:21 | And to represent this I am going to create a variable called 'exp' for expire and this will be equal to the time. |
| 01:28 | Let me add some value here. |
| 01:31 | At the moment I am adding zero. |
| 01:33 | So if I echo this out and get rid of this cookie function for now. |
| 01:39 | I'm just echoing out the time here just to show you what it does. |
| 01:43 | So lets refresh. So you can see quite a lot of digits here. |
| 01:47 | Now this is the unique time-stamp. |
| 01:50 | And the unique time-stamp is the number of seconds before January the 1st 1970. |
| 01:56 | So January the 1st at 12 am ummmm...... in the year 1970. |
| 02:02 | So you can see it here - I think the number of seconds in here equates to a date in the future. |
| 02:10 | So for example, at this moment you can see this 88, now 89 and as I keep refreshing, by every second this increases. |
| 02:20 | So yes, this is quite useful way of adding a specific value here. |
| 02:28 | Now we need to find out the time in seconds of a day because I want this cookie to expire in a day. |
| 02:34 | So I multiply 24 by 60 to get the number of minutes in a day. |
| 02:39 | And then multiply the answer by 60 to get the number of seconds in a day which is 86,400. |
| 02:47 | So if I replace zero with 86400, we have the variable "expire" that now holds the time in the future by a day. |
| 02:56 | To save time, I am copying this and I will add my expire variable here. |
| 03:02 | So this function will set our cookie called 'name' with a value of 'Alex' and it will expire in a day - read in seconds using the time function here. |
| 03:13 | So lets refresh this page and hey! we can see we have no errors which means it has worked. |
| 03:19 | Now what I'll do is I'll use block commenting to comment out all of these. |
| 03:23 | And below this I'll echo out this cookie. |
| 03:26 | But the reason I have commented this is because you don't need to set a cookie every time the user comes into the page. |
| 03:33 | If you are using a log in script and you let the user log into your website, you would need to issue this only once and then the cookie will be stored. |
| 03:41 | And you could use it within this time that we have set here. |
| 03:46 | So what I'll do is I'll set echo and I'll use a dollar sign, sorry, underscore cookie. |
| 03:52 | Inside here is the name of the cookie so I'll type 'name'. Refresh and you can see 'Alex'. |
| 03:59 | You can check it out. Even if I close my browser, restart my computer and came back into this page, it will still read Alex because its been stored into the computer. |
| 04:11 | Okay now if had to set another cookie, let's say, I set another cookie here and this will be 'age' and my age is 19. |
| 04:24 | And my expiry time I'll just keep as this. |
| 04:29 | So lets just put this up here. |
| 04:31 | We can replace the block commenting with line-comment to keep it neat. |
| 04:36 | So for our expiry time I'll set another cookie in here. |
| 04:41 | And that’ll have the same expiry time. Lets see if I can get it right. |
| 04:46 | Okay so we'll get rid of this. |
| 04:48 | We’ve set another cookie with the same expiry time. |
| 04:51 | Lets refresh. Okay that has been set. |
| 04:55 | So what I'll do is comment this out and here I will echo it out. |
| 05:01 | So you see we can set more than one cookie in a page. Lets refresh that and we can get 19. |
| 05:07 | Now we can also set a cookie in a single sentence. |
| 05:11 | For that I'll type echo underscore cookie, name and the concatenate "is" and then concatenate my age. |
| 05:27 | Therefore we will have a sentence saying Alex is 19 just from the cookies that we've stored. |
| 05:34 | And again if I close my browser or restart my computer or come back two hours later, this information will still be there stored on this computer ready to be used by this page. |
| 05:44 | So you can see that they are really very useful to use and really easy to create as well and easy to echo out the user. |
| 05:53 | Now there's a function we can use called 'print r' or 'print underscore r'. |
| 05:58 | And we can echo out 'dollar underscore cookie' here. We can align it a bit later... |
| 06:05 | Refresh this and you can see we've got an array here and we have a different value. |
| 06:12 | We have got name and that is equal to Alex and we've got an age which is equal to 19. |
| 06:22 | So these are cookies and they have been set and these are the values of the cookies. |
| 06:27 | This can be very useful if you want to echo this out to yourself. |
| 06:31 | Okay now there is another function which I will cover in the second part of this tutorial and I'll use an 'if' statement to find out if a cookie is set or not. |
| 06:41 | And I'll also show you how to unset a cookie. |
| 06:45 | So join me in part 2 and thanks for watching. This is Evan Varkey dubbing for the Spoken Tutorial Project. Bye. |
