getimagesize
Name
getimagesize — Determines image size and properties.
The returned array contains image-size information in
various formats.
Synopsis
array getimagesize(filename[, info]);
string filename: Path and
filename of image file
array info (optional): Array
passed by reference
Returns
Four-element array of image information or FALSE on error
Description
This function does not require the GD library, but is
included here because it's the only image-manipulation
function that doesn't. The returned result is a
four-element array. Elements 0 and 1 are the numerical
width and height of the image in pixels, respectively.
Element 2 contains the type of the image (see below).
Element 3 contains a text string suitable for inclusion
in an <IMG> tag to indicate the size of the image.
The type of the image is an integer value from 1 to 4: 1
indicates a GIF image, 2 indicates a JPEG image, 3
indicates a PNG image, and 4 indicates a Flash SWF file.
Other file types are not currently supported by PHP.
You can also pass an optional array to the function,
which must be passed by reference. This can be used to
obtain additional information about the image. This is an
associative array that currently supports only JPG APP
markers. Using the iptcparse() function, this
information can be extracted and displayed.
The ability to open an image via a URL was added in
version 4.0.5
Example
Example 387. Display image
size
$filename = "header.gif";
$imgsize = getimagesize($filename);
echo "<IMG SRC=\"$filename\" $imgsize[3]>";
Example 388. Display image
information
$size = getimagesize("test_image.jpg", &$info);
foreach ($info as $key=>$val) {
echo "$key => $val<P>\n";
}
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
This material may be distributed only subject to the terms and conditions set forth
in the Open Publication License, v1.0 or later (the latest version is presently available at
http://www.opencontent.org/openpub/).
The authors of this book have elected not to choose any options under the OPL. This online book was obtained
from
http://www.fooassociates.com/phpfer/
and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4
for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All
persons and entities shall have neither liability nor responsibility to any person or entity with respect to
any loss or damage arising from the information contained in this book.
PhpDig.net