PHP-and-MySQL/C4/File-Upload-Part-2/English-timed

Time	Narration
00:00	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.
00:10	Now I'll show you how to upload this file and move it to the uploaded folder here which is currently empty.
00:18	If you recall, we're referring to a temporary area that is being stored on our web server.
00:25	Its not of much use right now.
00:29	We have all our properties here, so I'll say properties of the uploaded file so we know what we're doing.
00:34	We have all our specific properties here.
00:38	I've given all of them easy to remember variable names so we don't need to comment each of these individually.
00:46	First thing we will do is create an 'if' statement to check if there are any errors.
00:53	Here if error code is bigger than zero meaning it has been issued by an error code then I'll say 'die'
01:03	And I will give an error message out "File couldn't..."
01:11	Or 'Error uploading file, code error'.
01:20	This will give the user an error code.
01:23	Now the 'else' part.
01:25	I'll add these curly brackets to keep that simple and in a single line.
01:29	So 'else' I want to use a function called 'move_uploaded_file'.
01:39	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'
01:51	So I'll type 'uploaded' and a forward slash.
01:59	And at the end of that we'll concatenate the name the file that we've uploaded.
02:07	So here it would just be 'name'.
02:10	This shows the user just adding the inter variables here.
02:15	Otherwise we would have to type these, for example - temp name.
02:19	Then go here and place it like this.
02:22	It gets quite messy and hard to read.
02:25	So its easier to just keep these variables here.
02:33	Okay so now I'll get rid of these or rather I'll keep these.
02:37	And lastly echo out a message saying 'Upload complete'.
02:41	Lets try this.
02:47	I logon to our page and pick our file - 'intro to avi'.
02:51	I'll click on upload and we can see that upload is complete.
02:55	Lets check my file.
02:57	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.
03:08	So we've successfully uploaded our file here.
03:13	There are a few more things that we need to do.
03:15	Undo another 'if' statement or undo this 'if' statement.
03:20	We are going to check for specific file types that we don't want uploaded.
03:24	So for example lets say I don't want avi files to be uploaded.
03:30	What I could do here is say - if error is bigger than zero, don't upload files.
03:37	Otherwise I'll start a new 'if' statement inside the else
03:41	And I'll create a block here.
03:47	And these are the conditions for the file.
03:51	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.
04:09	As you saw in the first part of this, as I echoed it out, it was equal to video dot avi.
04:19	And then we're saying that if it is equal to video dot avi then upload the file.
04:28	I'll just move it down here and I will put that into the 'else' block.
04:32	So now I have - if the video is equal to avi then die and the message is 'That format is not allowed'.
04:44	Okay so now I'll delete this from our uploaded directory and I'll come back to my initial uploaded file.
04:54	I'll choose intro dot avi and when I click upload it says that that 'format is not allowed'
05:01	And if you go to my uploaded directory you can see that the folder is empty.
05:06	Nothing has been uploaded.
05:08	Now instead of avi let us say I want to ban 'images with png' extension.
05:15	I'll change it here and upload my file again.
05:23	You can see that because its an accepted file format, we get the message 'Upload complete' and its been transferred to my uploaded folder.
05:33	Lets delete that again. Oh! I canceled it. Lets delete that again.
05:42	Okay. So what we've seen here is how to specify a specific type.
05:47	What we also can do is specify a specific file size.
05:51	I'll say 'or' using this 'or' operator and I'll say 'or' the size is bigger than half a megabyte.
06:04	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.
06:14	So that's five hundred thousand bytes which is equal to 0 point 4 megabytes. I'll just say half a megabyte for now.
06:29	This will evaluate the size and say is it bigger than half a megabyte.
06:38	Then it will say this format is not allowed.
06:43	So I'll change this message to accommodate 'Format not allowed or file size too big'.
06:56	So you can create an if statement for each of these that is for evaluating your type and evaluating your size.
07:03	You just need to take this condition and put it in another 'if' statement.
07:09	So I go back here and I'll choose my file again.
07:12	Just making sure its there.
07:14	Click upload and it'll say 'Format not allowed'.
07:19	Now if you go back to our code this is not in png format but it is exceeding the size limit.
07:25	Lets change this to 2 million which is 2 megabytes.
07:31	Refresh and send that.
07:33	We can see that our upload has been completed because this is only one megabyte in size.
07:39	That's all I have on File Upload for now.
07:44	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.
07:54	If you don't want big files on your web server this is a good way to control it.
07:58	Its very easy to create as you've seen.
08:01	Practice this and you'll be quite impressed with how useful this can be.
08:05	If you've got any questions please don't hesitate to ask.
08:08	Also please subscribe if you want to be notified on any updated videos or new videos.
08:15	Thanks for watching. This is Joshua Mathew dubbing for the Spoken Tutorial Project. Bye.

Contributors and Content Editors

Gaurav, Gyan, Pratik kamble, Sandhya.np14