Manuale PHP
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# exif_thumbnail

(PHP 4 >= 4.2.0, PHP 5)

exif_thumbnail -- Retrieve 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

Esempio 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_read_data()
image_type_to_mime_type()

Indietro | Partenza | Avanti
exif_tagname | Risali | read_exif_data