Introduktion
PHP is not limited to creating just HTML output. It can also be
used to create and manipulate image files in a variety of different
image formats, including GIF, PNG,
JPEG, WBMP, and XPM.
Even more convenient, PHP can output image streams directly to a browser. You
will need to compile PHP with the GD library of image
functions for this to work. GD and PHP may also require
other libraries, depending on which image formats you want to work with.
You can use the image functions in PHP to get the size of
JPEG, GIF,
PNG, SWF,
TIFF and JPEG2000 images.
With the exif extension, you are able
to work with information stored in headers of
JPEG and TIFF images. This way you can
read meta data generated by digital cameras. The exif
functions do not require the GD library.
Note:
Read the requirements section about how to expand image capabilities
to read, write and modify images. To read meta data of pictures
taken by digital cameras you need the above mentioned
exif extension.
Note:
The getimagesize() function does not require the GD extension.
gamesparamundo123 at gmail dot com ¶4 years ago
The EXIF extension has been updated to support a much larger range of formats. This means that their format specific tags are now properly translated when parsing images with the exif_read_data() function. The following new formats are now supported:
Samsung
DJI
Panasonic
Sony
Pentax
Minolta
Sigma/Foveon
AGFA
Kyocera
Ricoh
Epson
The EXIF functions exif_read_data() and exif_thumbnail() now support passing streams as their first argument.