exif_thumbnail
(PHP 4 >= 4.2.0, PHP 5)
exif_thumbnail — Retrieve the embedded thumbnail of a TIFF or JPEG image
Popis
exif_thumbnail() reads the embedded thumbnail of a TIFF or JPEG image.
If you want to deliver thumbnails through this function, you should send the mimetype information using the header() function.
It is possible that exif_thumbnail() cannot create an image but can determine its size. In this case, the return value is FALSE but width and height are set.
Parametre
- filename
-
The name of the image file being read. This image contains an embedded thumbnail.
- width
-
The return width of the returned thumbnail.
- height
-
The returned height of the returned thumbnail.
- imagetype
-
The returned image type of the returned thumbnail. This is either TIFF or JPEG.
Vrátené hodnoty
Returns the embedded thumbnail, or FALSE if the image contains no thumbnail.
ChangeLog
| Verzia | Popis |
|---|---|
| 4.3.0 | The optional parameters width , height , and imagetype all became available. |
| 4.3.0 | May return thumbnails in the TIFF format. |
Príklady
Example#1 exif_thumbnail() example
<?php
if (array_key_exists('file', $_REQUEST)) {
$image = exif_thumbnail($_REQUEST['file'], $width, $height, $type);
} else {
$image = false;
}
if ($image!==false) {
header('Content-type: ' .image_type_to_mime_type($type));
echo $image;
exit;
} else {
// no thumbnail available, handle the error here
echo 'No thumbnail available';
}
?>