Difference between revisions of "PHP-and-MySQL/C4/Cookies-Part-2/English-timed"
From Script | Spoken-Tutorial
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|Welcome back. Just to summarise - in the first part of the cookie tutorial, we learnt how to create cookies, how to give an expiry date to the cookie and how to print out specific cookies. | |Welcome back. Just to summarise - in the first part of the cookie tutorial, we learnt how to create cookies, how to give an expiry date to the cookie and how to print out specific cookies. | ||
|- | |- | ||
| − | | | + | |00:13 |
|Using this command here, we also learnt how to print out every cookie that we had stored. | |Using this command here, we also learnt how to print out every cookie that we had stored. | ||
|- | |- | ||
| − | | | + | |00:18 |
|So assuming that we have created these cookies, the next thing I'll do is use this specific cookie here that I have created, to check whether it does exist or not. | |So assuming that we have created these cookies, the next thing I'll do is use this specific cookie here that I have created, to check whether it does exist or not. | ||
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| − | | | + | |00:28 |
|To do so, we will use a function called “isset”. | |To do so, we will use a function called “isset”. | ||
|- | |- | ||
| − | | | + | |00:32 |
|This basically returns a true or false value depending on whether something is set or not. | |This basically returns a true or false value depending on whether something is set or not. | ||
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| − | | | + | |00:37 |
|For example- a cookie ,I'll put a dollar sign then underscore cookie. | |For example- a cookie ,I'll put a dollar sign then underscore cookie. | ||
|- | |- | ||
| − | | | + | |00:42 |
|And I'll put 'name' in here. | |And I'll put 'name' in here. | ||
|- | |- | ||
| − | | | + | |00:46 |
|So if I read this out in English language then I'll say - | |So if I read this out in English language then I'll say - | ||
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| − | | | + | |00:49 |
|If the cookie name is set then we say echo “Cookie is set”. | |If the cookie name is set then we say echo “Cookie is set”. | ||
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| − | | | + | |00:57 |
|Otherwise we will echo out to the user that "Cookie is not set". | |Otherwise we will echo out to the user that "Cookie is not set". | ||
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| − | | | + | |01:01 |
|Assuming that I have set my cookie and everything is working, when I refresh this I'll get the message that the "Cookie is set". | |Assuming that I have set my cookie and everything is working, when I refresh this I'll get the message that the "Cookie is set". | ||
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| − | | | + | |01:11 |
|Now I'll teach you how to 'unset' a cookie. | |Now I'll teach you how to 'unset' a cookie. | ||
|- | |- | ||
| − | | | + | |01:14 |
|So lets say over here - just before our 'if' statement, I wish to unset my cookie. | |So lets say over here - just before our 'if' statement, I wish to unset my cookie. | ||
|- | |- | ||
| − | | | + | |01:20 |
|So unset a cookie. | |So unset a cookie. | ||
|- | |- | ||
| − | | | + | |01:21 |
|So just to name one, I'll unset this cookie, | |So just to name one, I'll unset this cookie, | ||
|- | |- | ||
| − | | | + | |01:25 |
|presuming that if you learn to unset this one you can unset this one too. | |presuming that if you learn to unset this one you can unset this one too. | ||
|- | |- | ||
| − | | | + | |01:31 |
|So I'll unset this name cookie. | |So I'll unset this name cookie. | ||
|- | |- | ||
| − | | | + | |01:34 |
|So to unset we use the same command and that’s 'setcookie'. | |So to unset we use the same command and that’s 'setcookie'. | ||
|- | |- | ||
| − | | | + | |01:39 |
|So we are resetting a cookie. | |So we are resetting a cookie. | ||
|- | |- | ||
| − | | | + | |01:41 |
|This doesn’t seem to make any sense but it will soon. | |This doesn’t seem to make any sense but it will soon. | ||
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| − | | | + | |01:45 |
|Now we will set the cookie name to nothing. | |Now we will set the cookie name to nothing. | ||
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| − | | | + | |01:49 |
|And our expiry date here... | |And our expiry date here... | ||
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| − | | | + | |01:51 |
|I'll create a new one with "exp unset" | |I'll create a new one with "exp unset" | ||
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| − | | | + | |01:55 |
|And that is gonna equal to the time minus 86400. | |And that is gonna equal to the time minus 86400. | ||
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| − | | | + | |02:01 |
|Here we said plus which meant that the time is in the future. | |Here we said plus which meant that the time is in the future. | ||
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| − | | | + | |02:05 |
|Now by setting the cookie to this variable which represents a time in the future, we are actually unsetting the cookie. | |Now by setting the cookie to this variable which represents a time in the future, we are actually unsetting the cookie. | ||
|- | |- | ||
| − | | | + | |02:13 |
|So if I were to say - set a cookie that already exists called name, to 'no value' at all. | |So if I were to say - set a cookie that already exists called name, to 'no value' at all. | ||
|- | |- | ||
| − | | | + | |02:20 |
|And use “exp unset” variable to set it to a time in the future, thereby 'unsetting' our cookie. | |And use “exp unset” variable to set it to a time in the future, thereby 'unsetting' our cookie. | ||
|- | |- | ||
| − | | | + | |02:28 |
|So I'll get rid of this code for now and run this page, okay? | |So I'll get rid of this code for now and run this page, okay? | ||
|- | |- | ||
| − | | | + | |02:34 |
|Nothing has happened presuming my cookie is unset. | |Nothing has happened presuming my cookie is unset. | ||
|- | |- | ||
| − | | | + | |02:40 |
|Now I want to get rid of this code - so I'll comment this out. | |Now I want to get rid of this code - so I'll comment this out. | ||
|- | |- | ||
| − | | | + | |02:45 |
|And I'll put my 'if' statement back into my page. | |And I'll put my 'if' statement back into my page. | ||
|- | |- | ||
| − | | | + | |02:48 |
|Now presuming this says - is the cookie set name? I'm going to unset the cookie which should get the result "Cookie is not set". | |Now presuming this says - is the cookie set name? I'm going to unset the cookie which should get the result "Cookie is not set". | ||
|- | |- | ||
| − | | | + | |02:56 |
|Lets refresh and we got "Cookie is not set". | |Lets refresh and we got "Cookie is not set". | ||
|- | |- | ||
| − | | | + | |03:02 |
|And then from here you can set it again if you like and you can change the values of the cookie. | |And then from here you can set it again if you like and you can change the values of the cookie. | ||
|- | |- | ||
| − | | | + | |03:08 |
|To change the value of a cookie, you'll have to use 'setcookie' command again. | |To change the value of a cookie, you'll have to use 'setcookie' command again. | ||
|- | |- | ||
| − | | | + | |03:13 |
|You’ll say - set cookie name and here just type a new value | |You’ll say - set cookie name and here just type a new value | ||
|- | |- | ||
| − | | | + | |03:17 |
|So its not hard to work with cookies. | |So its not hard to work with cookies. | ||
|- | |- | ||
| − | | | + | |03:19 |
|Its quiet an easy process. | |Its quiet an easy process. | ||
|- | |- | ||
| − | | | + | |03:21 |
|And it’s a very very useful thing in php | |And it’s a very very useful thing in php | ||
|- | |- | ||
| − | | | + | |03:23 |
|So use it to your heart’s content. Okay. Thanks for watching. | |So use it to your heart’s content. Okay. Thanks for watching. | ||
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| − | | | + | |03:27 |
|If you have any questions, please let me know. | |If you have any questions, please let me know. | ||
|- | |- | ||
| − | | | + | |03:30 |
|This is Evan Varkey dubbing for the Spoken Tutorial Project. Bye. | |This is Evan Varkey dubbing for the Spoken Tutorial Project. Bye. | ||
Revision as of 12:45, 10 July 2014
| Time | Narration |
| 00:00 | Welcome back. Just to summarise - in the first part of the cookie tutorial, we learnt how to create cookies, how to give an expiry date to the cookie and how to print out specific cookies. |
| 00:13 | Using this command here, we also learnt how to print out every cookie that we had stored. |
| 00:18 | So assuming that we have created these cookies, the next thing I'll do is use this specific cookie here that I have created, to check whether it does exist or not. |
| 00:28 | To do so, we will use a function called “isset”. |
| 00:32 | This basically returns a true or false value depending on whether something is set or not. |
| 00:37 | For example- a cookie ,I'll put a dollar sign then underscore cookie. |
| 00:42 | And I'll put 'name' in here. |
| 00:46 | So if I read this out in English language then I'll say - |
| 00:49 | If the cookie name is set then we say echo “Cookie is set”. |
| 00:57 | Otherwise we will echo out to the user that "Cookie is not set". |
| 01:01 | Assuming that I have set my cookie and everything is working, when I refresh this I'll get the message that the "Cookie is set". |
| 01:11 | Now I'll teach you how to 'unset' a cookie. |
| 01:14 | So lets say over here - just before our 'if' statement, I wish to unset my cookie. |
| 01:20 | So unset a cookie. |
| 01:21 | So just to name one, I'll unset this cookie, |
| 01:25 | presuming that if you learn to unset this one you can unset this one too. |
| 01:31 | So I'll unset this name cookie. |
| 01:34 | So to unset we use the same command and that’s 'setcookie'. |
| 01:39 | So we are resetting a cookie. |
| 01:41 | This doesn’t seem to make any sense but it will soon. |
| 01:45 | Now we will set the cookie name to nothing. |
| 01:49 | And our expiry date here... |
| 01:51 | I'll create a new one with "exp unset" |
| 01:55 | And that is gonna equal to the time minus 86400. |
| 02:01 | Here we said plus which meant that the time is in the future. |
| 02:05 | Now by setting the cookie to this variable which represents a time in the future, we are actually unsetting the cookie. |
| 02:13 | So if I were to say - set a cookie that already exists called name, to 'no value' at all. |
| 02:20 | And use “exp unset” variable to set it to a time in the future, thereby 'unsetting' our cookie. |
| 02:28 | So I'll get rid of this code for now and run this page, okay? |
| 02:34 | Nothing has happened presuming my cookie is unset. |
| 02:40 | Now I want to get rid of this code - so I'll comment this out. |
| 02:45 | And I'll put my 'if' statement back into my page. |
| 02:48 | Now presuming this says - is the cookie set name? I'm going to unset the cookie which should get the result "Cookie is not set". |
| 02:56 | Lets refresh and we got "Cookie is not set". |
| 03:02 | And then from here you can set it again if you like and you can change the values of the cookie. |
| 03:08 | To change the value of a cookie, you'll have to use 'setcookie' command again. |
| 03:13 | You’ll say - set cookie name and here just type a new value |
| 03:17 | So its not hard to work with cookies. |
| 03:19 | Its quiet an easy process. |
| 03:21 | And it’s a very very useful thing in php |
| 03:23 | So use it to your heart’s content. Okay. Thanks for watching. |
| 03:27 | If you have any questions, please let me know. |
| 03:30 | This is Evan Varkey dubbing for the Spoken Tutorial Project. Bye. |
