A8 : iMe

New Skills

Image upload

Description

This is the process behind uploading an image.

It's a fairly simple process that uses a counter to check for a file extention and then runs a check to validate the file size.

If everything is in order the file is uploaded to ./upload_image/ directory along with a the date prefixed.

Code

```
<?
```
```
define ("MAX_SIZE","1024");
```
```
function getExtension($str){
```
```
$i = strrpos($str,".");
```
```
if (!$i) {return "";}
```
```
$l = strlen($str) - $i;
```
```
$ext = substr($str,$i+1,$l);
```
```
return $ext;}
```
```
$errors=0;
```
```
if(isset($_POST['Submit'])){
```
```
$image=$_FILES['image']['name'];
```
```
if ($image){
```

$filename = stripslashes($_FILES['image']['name']);

```
$today = date("y-m-d_");
```
```
$extension = getExtension($filename);
```
```
$extension = strtolower($extension);
```
```
if (($extension != "jpg")
```
```
&& ($extension != "jpeg")
```
```
&& ($extension != "png")
```
```
&& ($extension != "gif")){
```

echo '<h3>Error</h3><p>Upload atempt is not an image file.</p>';

```
$errors=1;}
```
```
else{
```

$size=filesize($_FILES['image']['tmp_name']);

```
if ($size > MAX_SIZE*1024){
```

echo '<h3>Error</h3><p>File image size is too big</p>';

```
$errors=1;}
```
```
$image_name=$today . $filename;
```
```
$newname="./upload_image/".$image_name;
```

$copied = copy($_FILES['image']['tmp_name'], $newname

```
if (!$copied){
```

echo '<h3>Error</h3><p>Upload unsuccessfull.</p>';

```
$errors=1;}
```
```
}
```
```
}
```
```
}
```

if(isset($_POST['Submit']) && !$errors){

echo "<h3>Success</h3><p>Image uploaded successfully.</p>";}

```
?>
```

```
//Start PHP protocol
```
```
//Define maximum size in Kb
```

//Function to start file extention check

```
//Variable equals find string
```

//If variable does not equals find string return blank

//Variable equals string minus first varibale

//Variable equals subtract string from second variable

```
//Return the extention
```
```
//Variable error equals 0
```
```
//If submit button pressed
```
```
//Variable equals files image and name
```
```
//If image equals
```
```
//Variable name with no slashes
```
```
//Define date
```

//Varibable equals extension of the file...

```
//...in a lowercase format
```
```
//If file is not jpg...
```
```
//...jpeg...
```
```
//...png...
```
```
//...gif...
```
```
//...print message
```
```
//Add error to counter
```
```
//Otherwise
```
```
//Get file size
```
```
//If file size is bigger than 1024Kb
```
```
//Print message
```
```
//Add error to counter
```
```
//Set date and filename as image name
```
```
//Define upload directory
```
```
//If copied and new name
```
```
//If not copied
```
```
//Print message
```
```
//Add error to counter
```
```
//Close else
```
```
//Close if ($image)
```
```
//Close submit
```
```
//If submit and no errors
```
```
//Print message
```
```
//End PHP protocol
```