Difference between revisions of "PHP-and-MySQL/C4/File-Upload-Part-2/English-timed"
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Revision as of 15:26, 25 October 2013
| Time | Narration |
|---|---|
| 0:00 | Welcome back. In the first part of this tutorial, I showed you how to take out specific properties of our uploaded file using this form here. |
| 0:10 | Now I'll show you how to upload this file and move it to the uploaded folder here which is currently empty. |
| 0:18 | If you recall, we're referring to a temporary area that is being stored on our web server. |
| 0:25 | Its not of much use right now. |
| 0:29 | We have all our properties here, so I'll say properties of the uploaded file so we know what we're doing. |
| 0:34 | We have all our specific properties here. |
| 0:38 | I've given all of them easy to remember variable names so we don't need to comment each of these individually. |
| 0:46 | First thing we will do is create an 'if' statement to check if there are any errors. |
| 0:53 | Here if error code is bigger than zero meaning it has been issued by an error code then I'll say 'die' |
| 1:03 | And I will give an error message out "File couldn't..." |
| 1:11 | Or 'Error uploading file, code error'. |
| 1:20 | This will give the user an error code. |
| 1:23 | Now the 'else' part. |
| 1:25 | I'll add these curly brackets to keep that simple and in a single line. |
| 1:29 | So 'else' I want to use a function called 'move_uploaded_file'. |
| 1:39 | Then we'll take the temporary name 'temp', which is the first parameter of this function and the second parameter is the destination which is 'uploaded folder' |
| 1:51 | So I'll type 'uploaded' and a forward slash. |
| 1:59 | And at the end of that we'll concatenate the name the file that we've uploaded. |
| 2:07 | So here it would just be 'name'. |
| 2:10 | This shows the user just adding the inter variables here. |
| 2:15 | Otherwise we would have to type these, for example - temp name. |
| 2:19 | Then go here and place it like this. |
| 2:22 | It gets quite messy and hard to read. |
| 2:25 | So its easier to just keep these variables here. |
| 2:33 | Okay so now I'll get rid of these or rather I'll keep these. |
| 2:37 | And lastly echo out a message saying 'Upload complete'. |
| 2:41 | Lets try this. |
| 2:47 | I logon to our page and pick our file - 'intro to avi'. |
| 2:51 | I'll click on upload and we can see that upload is complete. |
| 2:55 | Lets check my file. |
| 2:57 | Upload folder and click on my uploaded sub directory you can see that the file is here whereas before - it had been stored in the temporary directory on my web server. |
| 3:08 | So we've successfully uploaded our file here. |
| 3:13 | There are a few more things that we need to do. |
| 3:15 | Undo another 'if' statement or undo this 'if' statement. |
| 3:20 | We are going to check for specific file types that we don't want uploaded. |
| 3:24 | So for example lets say I don't want avi files to be uploaded. |
| 3:30 | What I could do here is say - if error is bigger than zero, don't upload files. |
| 3:37 | Otherwise I'll start a new 'if' statement inside the else |
| 3:41 | And I'll create a block here. |
| 3:47 | And these are the conditions for the file. |
| 3:51 | I'll say - if the type of file - that's our type variable, t-y-p-e, 2 equal to signs, equals video dot avi. |
| 4:09 | As you saw in the first part of this, as I echoed it out, it was equal to video dot avi. |
| 4:19 | And then we're saying that if it is equal to video dot avi then upload the file. |
| 4:28 | I'll just move it down here and I will put that into the 'else' block. |
| 4:32 | So now I have - if the video is equal to avi then die and the message is 'That format is not allowed'. |
| 4:44 | Okay so now I'll delete this from our uploaded directory and I'll come back to my initial uploaded file. |
| 4:54 | I'll choose intro dot avi and when I click upload it says that that 'format is not allowed' |
| 5:01 | And if you go to my uploaded directory you can see that the folder is empty. |
| 5:06 | Nothing has been uploaded. |
| 5:08 | Now instead of avi let us say I want to ban 'images with png' extension. |
| 5:15 | I'll change it here and upload my file again. |
| 5:23 | You can see that because its an accepted file format, we get the message 'Upload complete' and its been transferred to my uploaded folder. |
| 5:33 | Lets delete that again. Oh! I canceled it. Lets delete that again. |
| 5:42 | Okay. So what we've seen here is how to specify a specific type. |
| 5:47 | What we also can do is specify a specific file size. |
| 5:51 | I'll say 'or' using this 'or' operator and I'll say 'or' the size is bigger than half a megabyte. |
| 6:04 | This is half a megabyte, which is five hundred thousand bits sorry bytes. I think I made a mistake and said bits instead of bytes. |
| 6:14 | So that's five hundred thousand bytes which is equal to 0 point 4 megabytes. I'll just say half a megabyte for now. |
| 6:29 | This will evaluate the size and say is it bigger than half a megabyte. |
| 6:38 | Then it will say this format is not allowed. |
| 6:43 | So I'll change this message to accommodate 'Format not allowed or file size too big'. |
| 6:56 | So you can create an if statement for each of these that is for evaluating your type and evaluating your size. |
| 7:03 | You just need to take this condition and put it in another 'if' statement. |
| 7:09 | So I go back here and I'll choose my file again. |
| 7:12 | Just making sure its there. |
| 7:14 | Click upload and it'll say 'Format not allowed'. |
| 7:19 | Now if you go back to our code this is not in png format but it is exceeding the size limit. |
| 7:25 | Lets change this to 2 million which is 2 megabytes. |
| 7:31 | Refresh and send that. |
| 7:33 | We can see that our upload has been completed because this is only one megabyte in size. |
| 7:39 | That's all I have on File Upload for now. |
| 7:44 | This is all you need to know to use this to keep out specific file types and file sizes that are too large for your web server. |
| 7:54 | If you don't want big files on your web server this is a good way to control it. |
| 7:58 | Its very easy to create as you've seen. |
| 8:01 | Practice this and you'll be quite impressed with how useful this can be. |
| 8:05 | If you've got any questions please don't hesitate to ask. |
| 8:08 | Also please subscribe if you want to be notified on any updated videos or new videos. |
| 8:15 | Thanks for watching. This is Joshua Mathew dubbing for the Spoken Tutorial Project. Bye. |
