Difference between revisions of "PHP-and-MySQL/C4/File-Upload-Part-2/English-timed"

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|I'll say - if the type of file - that's our '''$type''' variable, t-y-p-e, 2 equal to signs, equals "video slash avi".
|I'll say - if the type of file - that's our '''$type''' variable, t-y-p-e, 2 equal to signs, equals '''video slash avi'''.
|As you saw in the first part of this, as I echoed it out, it was equal to video slash avi.  
|As you saw in the first part of this, as I echoed it out, it was equal to '''video slash avi'''.  
|And then we're saying that if it is equal to "video slash avi" then upload the file.
|And then we're saying that if it is equal to '''video slash avi''' then upload the file.

Latest revision as of 15:48, 17 November 2015

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 It's 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 $error".
01:20 This will give the user an error code.
01:23 Now the else part.
01:25 I'll add these curly brackets to keep that simple and in a single line.
01:29 So else, I want to use a function called 'move_uploaded_file()'.
01:39 Then we'll take the temporary name 'temp' which is the first parameter of this function and the second parameter is the destination which is 'uploaded folder'.
01:51 So, I'll type 'uploaded' and a forward slash.
01:59 And at the end of that we'll concatenate the name of the file that we've uploaded.
02:07 So, here it would just be '$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, it's 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 Let's 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 Let's 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 let's 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 slash avi.
04:09 As you saw in the first part of this, as I echoed it out, it was equal to video slash avi.
04:19 And then we're saying that if it is equal to video slash 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 it's an accepted file format, we get the message "Upload complete!" and it's been transferred to my 'uploaded' folder.
05:33 Let's delete that again. Oh! I canceled it. Let's 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 it's 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 Let's 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 It's 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