(PHP 4 >= 4.2.0, PHP 5, PHP 7)
exif_thumbnail — 取锟斤拷嵌锟斤拷锟斤拷 TIFF 锟斤拷 JPEG 图锟斤拷锟叫碉拷锟斤拷锟斤拷图
$filename
[, int &$width
[, int &$height
[, int &$imagetype
]]] ) : string
exif_thumbnail() 锟斤拷取 TIFF 锟斤拷 JPEG
图锟斤拷锟叫碉拷嵌锟斤拷锟斤拷锟斤拷图锟斤拷锟斤拷锟酵硷拷癫话锟斤拷锟斤拷锟斤拷锟酵硷拷蚍祷锟� FALSE锟斤拷
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.
filenameThe name of the image file being read. This image contains an embedded thumbnail.
widthThe return width of the returned thumbnail.
heightThe returned height of the returned thumbnail.
imagetypeThe returned image type of the returned thumbnail. This is either TIFF or JPEG.
Returns the embedded thumbnail, or FALSE if the image contains no
thumbnail.
| 锟芥本 | 说锟斤拷 |
|---|---|
| 4.3.0 |
The optional parameters width,
height, and imagetype
all became available.
|
| 4.3.0 | May return thumbnails in the TIFF format. |
Example #1 exif_thumbnail() 锟斤拷锟斤拷
<?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";
}
?>