Difference between revisions of "PHP-and-MySQL/C2/Common-Errors-Part-3/English-timed"
From Script | Spoken-Tutorial
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| − | + | |'''Time''' | |
| − | + | |'''Narration''' | |
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| − | | | + | |00:00 |
|Right now I am onto the last two common errors that I have included. | |Right now I am onto the last two common errors that I have included. | ||
|- | |- | ||
| − | | | + | |00:05 |
|And we will start with the hard one. | |And we will start with the hard one. | ||
|- | |- | ||
| − | | | + | |00:09 |
|This is php header and we are using "header" function going to a location. | |This is php header and we are using "header" function going to a location. | ||
|- | |- | ||
| − | | | + | |00:14 |
|And here I have got some html code. | |And here I have got some html code. | ||
|- | |- | ||
| − | | | + | |00:18 |
|This is a header tag, I am saying "Welcome!". | |This is a header tag, I am saying "Welcome!". | ||
|- | |- | ||
| − | | | + | |00:21 |
|And our "goto" variable is "google dot com". | |And our "goto" variable is "google dot com". | ||
|- | |- | ||
| − | | | + | |00:26 |
|If the "goto" exists, which it currently does, we are going to redirect the page to a u-r-l "google dot com". | |If the "goto" exists, which it currently does, we are going to redirect the page to a u-r-l "google dot com". | ||
|- | |- | ||
| − | | | + | |00:35 |
|Right now, this will return an error. | |Right now, this will return an error. | ||
|- | |- | ||
| − | | | + | |00:37 |
|And the error is - Oh! um... Okay that’s why. "o b start". | |And the error is - Oh! um... Okay that’s why. "o b start". | ||
|- | |- | ||
| − | | | + | |00:50 |
|Lets get rid of this. That wasn’t supposed to be there. That code is to fix the error! | |Lets get rid of this. That wasn’t supposed to be there. That code is to fix the error! | ||
|- | |- | ||
| − | | | + | |00:56 |
|Sorry, so we will go to "php header" and we have got "Welcome!" - our html code. | |Sorry, so we will go to "php header" and we have got "Welcome!" - our html code. | ||
|- | |- | ||
| − | | | + | |01:03 |
|Then a warning - "Cannot modify header information – headers already sent by..." and all of this. | |Then a warning - "Cannot modify header information – headers already sent by..." and all of this. | ||
|- | |- | ||
| − | | | + | |01:10 |
|Okay so our headers have already been sent. This is the line no. by the way. | |Okay so our headers have already been sent. This is the line no. by the way. | ||
|- | |- | ||
| − | | | + | |01:16 |
|1, 2, 3 so if it gives you an error like "phpheader dot php" colon 3, then the error has occurred on the line no. 3. | |1, 2, 3 so if it gives you an error like "phpheader dot php" colon 3, then the error has occurred on the line no. 3. | ||
|- | |- | ||
| − | | | + | |01:26 |
|So that's where the error is - on line 3, okay? | |So that's where the error is - on line 3, okay? | ||
|- | |- | ||
| − | | | + | |01:32 |
|And this error has been generated by line 9, which if you go here, is our "header" function. | |And this error has been generated by line 9, which if you go here, is our "header" function. | ||
|- | |- | ||
| − | | | + | |01:39 |
|So the reason that this is happening is we are already sending our html code. | |So the reason that this is happening is we are already sending our html code. | ||
|- | |- | ||
| − | | | + | |01:47 |
|If I get rid of this by commenting it, and I were to refresh then we would be redirected to google. | |If I get rid of this by commenting it, and I were to refresh then we would be redirected to google. | ||
|- | |- | ||
| − | | | + | |01:54 |
|But the point is that we want this welcome header here. | |But the point is that we want this welcome header here. | ||
|- | |- | ||
| − | | | + | |01:59 |
|And you can’t actually put html before a header function, going to location and other features of this function. | |And you can’t actually put html before a header function, going to location and other features of this function. | ||
|- | |- | ||
| − | | | + | |02:10 |
|You shouldn't do so. | |You shouldn't do so. | ||
|- | |- | ||
| − | | | + | |02:15 |
|So as you saw a minute ago that is "ob underscore start". | |So as you saw a minute ago that is "ob underscore start". | ||
|- | |- | ||
| − | | | + | |02:20 |
|What this does is, it fixes this problem for us. | |What this does is, it fixes this problem for us. | ||
|- | |- | ||
| − | | | + | |02:25 |
|So I can come here to "phpheader" and it works, even though I have still got my html code echoed here before my header. | |So I can come here to "phpheader" and it works, even though I have still got my html code echoed here before my header. | ||
|- | |- | ||
| − | | | + | |02:37 |
|So without this we get an error (pause) and with this our header works fine, okay? | |So without this we get an error (pause) and with this our header works fine, okay? | ||
|- | |- | ||
| − | | | + | |02:47 |
|Despite the initial rule of no html output before header up here. | |Despite the initial rule of no html output before header up here. | ||
|- | |- | ||
| − | | | + | |02:53 |
|That should be pretty clear by now. | |That should be pretty clear by now. | ||
|- | |- | ||
| − | | | + | |02:55 |
|Now, the last one is extremely simple. | |Now, the last one is extremely simple. | ||
|- | |- | ||
| − | | | + | |02:58 |
|I don’t even need to explain it but anyway. | |I don’t even need to explain it but anyway. | ||
|- | |- | ||
| − | | | + | |03:02 |
|This is "include a file which doesn’t even exist" named as "idontexist dot php". | |This is "include a file which doesn’t even exist" named as "idontexist dot php". | ||
|- | |- | ||
| − | | | + | |03:08 |
|So lets have a look. Um.. where is it? "missing dot php". | |So lets have a look. Um.. where is it? "missing dot php". | ||
|- | |- | ||
| − | | | + | |03:13 |
|Oh no! Its not. "open dot php". | |Oh no! Its not. "open dot php". | ||
|- | |- | ||
| − | | | + | |03:16 |
|Okay! So - include "idontexist dot php" failed to open stream; no such file or directory in that name here. | |Okay! So - include "idontexist dot php" failed to open stream; no such file or directory in that name here. | ||
|- | |- | ||
| − | | | + | |03:25 |
|Our file name and directory on line 3. | |Our file name and directory on line 3. | ||
|- | |- | ||
| − | | | + | |03:27 |
|So lets come to line 3. | |So lets come to line 3. | ||
|- | |- | ||
| − | | | + | |03:30 |
|And that is the only line of significant code in this file. | |And that is the only line of significant code in this file. | ||
|- | |- | ||
| − | | | + | |03:35 |
|We have another warning here - Failed to open "idontexist dot php" for inclusion and all of this. So we get two errors. | |We have another warning here - Failed to open "idontexist dot php" for inclusion and all of this. So we get two errors. | ||
|- | |- | ||
| − | | | + | |03:43 |
|This is quite messy when you have a page that has "include a header file". | |This is quite messy when you have a page that has "include a header file". | ||
|- | |- | ||
| − | | | + | |03:50 |
|Then these don’t look too nice. I mean you have probably been in a website before and you have seen this at the top. | |Then these don’t look too nice. I mean you have probably been in a website before and you have seen this at the top. | ||
|- | |- | ||
| − | | | + | |03:57 |
|You need to be attractive. So you can put a "@ (at)" symbol in front and refresh. | |You need to be attractive. So you can put a "@ (at)" symbol in front and refresh. | ||
|- | |- | ||
| − | | | + | |04:02 |
|That won't show the error anymore. | |That won't show the error anymore. | ||
|- | |- | ||
| − | | | + | |04:06 |
|But it doesn’t excuse the fact that the file doesn’t exist. | |But it doesn’t excuse the fact that the file doesn’t exist. | ||
|- | |- | ||
| − | | | + | |04:10 |
|So the content of the file which doesn’t exist, won’t be included. | |So the content of the file which doesn’t exist, won’t be included. | ||
|- | |- | ||
| − | | | + | |04:14 |
|But yes, to be honest, looking at this, this is really pretty much self explanatory. I just thought I should explain this anyways. | |But yes, to be honest, looking at this, this is really pretty much self explanatory. I just thought I should explain this anyways. | ||
|- | |- | ||
| − | | | + | |04:23 |
|So we have got a small collection of errors that you might come across when you are programming in php. | |So we have got a small collection of errors that you might come across when you are programming in php. | ||
|- | |- | ||
| − | | | + | |04:30 |
|If there are other errors that you are getting, then please message me and I will be happy to help. | |If there are other errors that you are getting, then please message me and I will be happy to help. | ||
|- | |- | ||
| − | | | + | |04:39 |
|Please subscribe for latest updates. Thanks for watching. This is Evan Varkey dubbing for the Spoken Tutorial project. | |Please subscribe for latest updates. Thanks for watching. This is Evan Varkey dubbing for the Spoken Tutorial project. | ||
Revision as of 11:49, 10 July 2014
| Time | Narration |
| 00:00 | Right now I am onto the last two common errors that I have included. |
| 00:05 | And we will start with the hard one. |
| 00:09 | This is php header and we are using "header" function going to a location. |
| 00:14 | And here I have got some html code. |
| 00:18 | This is a header tag, I am saying "Welcome!". |
| 00:21 | And our "goto" variable is "google dot com". |
| 00:26 | If the "goto" exists, which it currently does, we are going to redirect the page to a u-r-l "google dot com". |
| 00:35 | Right now, this will return an error. |
| 00:37 | And the error is - Oh! um... Okay that’s why. "o b start". |
| 00:50 | Lets get rid of this. That wasn’t supposed to be there. That code is to fix the error! |
| 00:56 | Sorry, so we will go to "php header" and we have got "Welcome!" - our html code. |
| 01:03 | Then a warning - "Cannot modify header information – headers already sent by..." and all of this. |
| 01:10 | Okay so our headers have already been sent. This is the line no. by the way. |
| 01:16 | 1, 2, 3 so if it gives you an error like "phpheader dot php" colon 3, then the error has occurred on the line no. 3. |
| 01:26 | So that's where the error is - on line 3, okay? |
| 01:32 | And this error has been generated by line 9, which if you go here, is our "header" function. |
| 01:39 | So the reason that this is happening is we are already sending our html code. |
| 01:47 | If I get rid of this by commenting it, and I were to refresh then we would be redirected to google. |
| 01:54 | But the point is that we want this welcome header here. |
| 01:59 | And you can’t actually put html before a header function, going to location and other features of this function. |
| 02:10 | You shouldn't do so. |
| 02:15 | So as you saw a minute ago that is "ob underscore start". |
| 02:20 | What this does is, it fixes this problem for us. |
| 02:25 | So I can come here to "phpheader" and it works, even though I have still got my html code echoed here before my header. |
| 02:37 | So without this we get an error (pause) and with this our header works fine, okay? |
| 02:47 | Despite the initial rule of no html output before header up here. |
| 02:53 | That should be pretty clear by now. |
| 02:55 | Now, the last one is extremely simple. |
| 02:58 | I don’t even need to explain it but anyway. |
| 03:02 | This is "include a file which doesn’t even exist" named as "idontexist dot php". |
| 03:08 | So lets have a look. Um.. where is it? "missing dot php". |
| 03:13 | Oh no! Its not. "open dot php". |
| 03:16 | Okay! So - include "idontexist dot php" failed to open stream; no such file or directory in that name here. |
| 03:25 | Our file name and directory on line 3. |
| 03:27 | So lets come to line 3. |
| 03:30 | And that is the only line of significant code in this file. |
| 03:35 | We have another warning here - Failed to open "idontexist dot php" for inclusion and all of this. So we get two errors. |
| 03:43 | This is quite messy when you have a page that has "include a header file". |
| 03:50 | Then these don’t look too nice. I mean you have probably been in a website before and you have seen this at the top. |
| 03:57 | You need to be attractive. So you can put a "@ (at)" symbol in front and refresh. |
| 04:02 | That won't show the error anymore. |
| 04:06 | But it doesn’t excuse the fact that the file doesn’t exist. |
| 04:10 | So the content of the file which doesn’t exist, won’t be included. |
| 04:14 | But yes, to be honest, looking at this, this is really pretty much self explanatory. I just thought I should explain this anyways. |
| 04:23 | So we have got a small collection of errors that you might come across when you are programming in php. |
| 04:30 | If there are other errors that you are getting, then please message me and I will be happy to help. |
| 04:39 | Please subscribe for latest updates. Thanks for watching. This is Evan Varkey dubbing for the Spoken Tutorial project. |
