Hi there,
I haven't tested any of this, and there are probably some things that need
adding, but it'll give you an idea at least.
Form element:
input type=file name=thefile
// What files do we want?
$types_we_want = array(image/gif, image/jpeg, image/pjpeg); // allows
jpegs and gifs
// What is the max size we want (in bytes)?
$size_we_want = (50 * 1024); // 50Kb
// function to test whether or not the file is an image, and whether it is
in the correct
// size restriction
function CheckImage($thefile, $thefile_name, $thefile_type, $thefile_size,
$types_we_want, $size_we_want) {
if (!in_array($thefile_type, $types_we_want)) {
// the file is of invalid type
return false;
} else
if ($thefile_size $size_we_want) {
// too big
return false;
}
return true;
}
// function to explain what's wrong with the file
function AnImageError($thefile, $thefile_name, $thefile_type, $thefile_size,
$types_we_want, $size_we_want) {
if (!in_array($thefile_type, $types_we_want)) {
// the file is of invalid type
echo $thefile_name . is not a jpeg or gif!;
} else
if ($thefile_size $size_we_want) {
// too big
echo $thefile_name . is bigger than the allowed file size of .
($size_we_want / 1024) . Kb;
}
}
// function to change the name of the image (if you don't do this, and one
person
// uploads a file named name.jpg and then another person uploads a file
with
// the same name, the second will overwrite the original
function NewImageName($thefile_name, $thefile_type) {
$timestamp = time(); // use a timestamp
$prefix = substr($thefile_name, 0, 2); // get two characters from the
beginning of the filename
// for a bit of randomness (use another function like mtsrand() (see
manual))
// for something better
if ($thefile_type == image/jpeg || $thefile_type == image/pjpeg) {
// file is a jpeg
$ext = .jpg;
} else {
// file is a gif
$ext = .gif;
}
$newfilename = $prefix . $timestamp . $ext;
return $newfilename;
}
// function to upload the file.
function DoUploadFile($thefile, $thefile_name, $thefile_type, $thefile_size)
{
global $connection; // this contains details of your mysql connection
$size = @GetImageSize($thefile);
list($ignoreme,$width,$ignoremeagain,$height) = explode(\,$size[3]);
// gets the width and height of the file
// rename the image with the function we defined above
$newfilename = NewImageName($thefile_name, $thefile_type);
// specify a directory to copy the temp file to in the following line
// eg /home/mysite/web/images
if (!@copy($thefile, /path/to/store/files . $newfilename)) {
echo Sorry, something's gone wrong here.;
} else {
// insert the data into your table. the columns are the unique id
of the file,
// the date the file is uploaded in datetime format,
// the name of the file (varchar, 50), its size in bytes( int), its
width(int) and height(int).
$insert_data = INSERT INTO mysql_table
(picid, picorigin, picname, picsize,
picwidth, picheight)
VALUES
('', NOW(), '$newfilename', '$thefile_size',
'$width', '$height');
$do_upload = @mysql_query($insert_data, $connection);
if (!$do_upload) { // query failed
echo There was an error with the database.;
} else {
echo Thanks. . $thefile_name . has been uploaded.;
}
}
}
// Put it all together in your form handling
if ($thefile_name != ) {
if (!CheckImage($thefile, $thefile_name, $thefile_type, $thefile_size,
$types_we_want, $size_we_want)) {
AnImageError($thefile, $thefile_name, $thefile_type, $thefile_size,
$types_we_want, $size_we_want);
} else {
DoUploadFile($thefile, $thefile_name, $thefile_type, $thefile_size);
}
}
Hope that helps,
James.
Dr. Evil [EMAIL PROTECTED] wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
My PHP script needs to receive some files. I've seen sites which
accept them; they have a Browse button which lets the user select a
file to send. That's what I want to do.
I have a few questions about this. First of all, this is with
php4.06. Secondly, the files are all going to be images, and not very
large: no more than 50k.
What's the best way to do this? I notice that PHP can store these
files on disk, but I'm going to be storing them in a DB. I would
rather receive them directly into a PHP variable. Is this possible?
Or should I take them in a file, and then read them back in to a
variable?
Also, if they need to go into a file, which directory is safest for
this? /tmp contains some important files. And finally, how do I
limit the maximum file size that PHP will accept?
Thanks
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