exif_thumbnail
(PHP 4 >= 4.2.0, PHP 5)
exif_thumbnail -- Retrieve the embedded thumbnail of a TIFF or JPEG image
Описание
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.
Список параметров
- 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.
Возвращаемые значения
Returns the embedded thumbnail, or FALSE if the image contains no
thumbnail.
Примеры
Пример 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';
}
?>
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