Exif Funzioni
PHP Manual

exif_thumbnail

(PHP 4 >= 4.2.0, PHP 5)

exif_thumbnailRetrieve the embedded thumbnail of a TIFF or JPEG image

Descrizione

string exif_thumbnail ( string $filename [, int &$width [, int &$height [, int &$imagetype ]]] )

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.

Elenco dei parametri

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.

Valori restituiti

Returns the embedded thumbnail, or FALSE if the image contains no thumbnail.

Log delle modifiche

Versione Descrizione
4.3.0 The optional parameters width, height, and imagetype all became available.
4.3.0 May return thumbnails in the TIFF format.

Esempi

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';
}
?>

Vedere anche:


Exif Funzioni
PHP Manual