renaming uploads

[rulian]

okay, i'm kind of stuck on this one, how would I go about in renaming uploaded files to their titles, for instance, a user submits 2 variables, file, and title,

so I want to copy the file so that it's now the title's name, plus file type

$title2="$title.$extention";
if(!copy ($file, "$title2")) echo "Error";

so, i need the code to detect what kind of it is and give it the corresponding extention. I'm thinking about arrays but it doesnt seem to be working for me

[mithril]

You can get the file's mime type using the $HTTP_POST_FILES var. For example,
let's assume that the name of the file input field is "form_data[some_file]". The var your need to look at is $HTTP_POST_FILES[form_data][some_file][type] to determine the file type. Once you know that, you can work some form of case selection to create the proper extension you need. For example:

<?php

  // declare function used to process file uploads
function processFormData($form_data, $HTTP_POST_FILES) {

	  // intialize variable used as create file flag
	$valid_file = "false";

	  // check to see what kind of file was uploaded
	switch ($HTTP_POST_FILES[form_data][some_file][type]) {

		  // if the file is a jpeg
		case 'image/jpeg':

			  // create message string
			$str = "You have uploaded a valid image of JPEG type";

			  // create file extension and set create file flag
			$ext = ".jpg";
			$valid_file = "true";
			break;

		  // if the file is a pjpeg
		case 'image/pjpeg':

			  // create message string
			$str = "You have uploaded a valid image of PJPEG type";

			  // create file extension and set create file flag
			$ext = ".jpg";
			$valid_file = "true";
			break;

		  // if the file is a gif
		case 'image/gif':

			  // create message string
			$str = "You have uploaded a valid image of GIF type";

			  // create file extension and set create file flag
			$ext = ".jpg";
			$valid_file = "true";
			break;

		  // if the file is of an unacceptable type
		default:

			  // create message string
			$str = "Sorry, you cannot upload files of type" . $HTTP_POST_FILES[form_data][some_file][type] . "to this server.";
			break;
	}

	  // if a valid file was presented to the server
	if ($valid_file != "false") {

		  // create the file path to copy the new file to
		$path = "/some/path/";

		  // copy the temp upload file to the new location, renaming it to the title specified by the user in the form
		@copy($HTTP_POST_FILES[form_data][some_file][tmp_name], $path . $form_data[title] . $ext)
	}

	  // return the message string
	return $str;
}

  // declare file upload form function
function form($PHP_SELF) {

	  // print file upload form
	echo "<form method = 'post' action = '$PHP_SELF' enctype = 'multipart/form-data'>\n";
	echo "<div align = center>\n<h3>File Upload Form</h3>\n";
	echo "<table>\n<tr>\n";
	echo "<td>select the file to upload:</td><td><input type = 'file' name = 'form_data[some_file]'></td>\n";
	echo "<td>provide a name for the file:</td><td><input type = 'text' name = 'form_data[title]'></td>\n";
	echo "<td align = center colspan = 2><input type = 'submit' name = 'submit' value = 'Upload the File'></td>\n";
	echo "</tr>\n</table>\n</div>\n</form>\n";
}


  // if the file upload form has been submitted
if (isset($submit)) {

	  // call the function which validates and processes the data
	 echo processFormData($form_data, $HTTP_POST_FILES);
}

  // if the file upload form has not been submitted
else {

	  // display the file upload form
	form($PHP_SELF);
}

?>

I haven't tested this code so it's quite likely that there's stupid little mistakes in it, but you should get the gist of the idea. Hope this helps!!!

Cheers,

Geoff A. Virgo