About Us
//define a maxim size for the uploaded images in Kb define (“MAX_SIZE”,”100”);
//This function reads the extension of the file. It is used to determine if the file is an image by checking the extension. function getExtension($str) { $i = strrpos($str,”.”); if (!$i) { return ””; } $l = strlen($str) – $i; $ext = substr($str,$i+1,$l); return $ext; }
//This variable is used as a flag. The value is initialized with 0 (meaning no error found)
//and it will be changed to 1 if an errro occures.
//If the error occures the file will not be uploaded.
$errors=0;
//checks if the form has been submitted
if(isset($_POST[‘Submit’]))
{
//reads the name of the file the user submitted for uploading
$image=$_FILES‘image’;
//if it is not empty
if ($image)
{
//get the original name of the file from the clients machine
$filename = stripslashes($_FILES‘image’);
//get the extension of the file in a lower case format
$extension = getExtension($filename);
$extension = strtolower($extension);
//if it is not a known extension, we will suppose it is an error and will not upload the file,
//otherwise we will do more tests
if (($extension != “jpg”) && ($extension != “jpeg”) && ($extension != “png”) && ($extension != “gif”))
{
//print error message
echo ‘
Unknown extension!
’; $errors=1; } else {//get the size of the image in bytes //$_FILES‘image’ is the temporary filename of the file //in which the uploaded file was stored on the server $size=filesize($_FILES‘image’);
//compare the size with the maxim size we defined and print error if bigger
if ($size > MAX_SIZE1024)
{
echo ‘You have exceeded the size limit!
’;
$errors=1;
}
//we will give an unique name, for example the time in unix time format
$image_name=time().’.’.$extension;
//the new name will be containing the full path where will be stored (images folder)
$newname=”images/”.$image_name;
//we verify if the image has been uploaded, and print error instead
$copied = copy($_FILES‘image’, $newname);
if (!$copied)
{
echo ‘
Copy unsuccessfull!
’; $errors=1;}}}}
//If no errors registred, print the success message if(isset($_POST[‘Submit’]) && !$errors) { echo “
File Uploaded Successfully! Try again!
”; }?>