(PHP 3 <= 3.0.18, PHP 4 >= 4.0.0)
GetImageSize -- Get the size of an image
Description
array getimagesize (string filename [, array imageinfo])
The GetImageSize() function will determine the size of any GIF,
JPG, PNG, SWF, PSD or BMP image file and
return the dimensions along with the file type and a height/width text string to be used inside a
normal HTML IMG tag.
Returns an array with 4 elements. Index 0 contains the width of the image in pixels. Index
1 contains the height. Index 2 a flag indicating the type of the image. 1 = GIF, 2 = JPG, 3 = PNG,
4 = SWF, 5 = PSD, 6 = BMP. Index 3 is a text string with the correct "height=xxx width=xxx" string
that can be used directly in an IMG tag.
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Example 1. GetImageSize (file)
<?php $size = GetImageSize ("img/flag.jpg"); ?>
<IMG SRC="img/flag.jpg" <?php echo $size[3]; ?>
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Example 2. GetImageSize (URL)
<?php $size = GetImageSize ("http://www.php.net/gifs/logo.gif"); ?>
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With JPG images, two extras index are returned : channel and
bits. channel will be 3 for RGB pictures, and 4 for CMYK pictures. bits is
the number of bits for each color.
If accessing the filename image is impossible, or if it isn't a valid
picture, getimagesize() will return NULL and generate a warning.
The optional imageinfo parameter allows you to extract some extended
information from the image file. Currently this will return the different JPG APP
markers in an associative Array. Some Programs use these APP markers to embedd text information in
images. A very common one in to embed IPTC http://www.iptc.org/ information in the APP13 marker. You can use the iptcparse() function to parse the binary APP13 marker into
something readable.
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Example 3. GetImageSize returning IPTC
<?php
$size = GetImageSize ("testimg.jpg",∓$info);
if (isset ($info["APP13"])) {
$iptc = iptcparse ($info["APP13"]);
var_dump ($iptc);
}
?>
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Note: This function does not require the GD image library.
Note: URL support was added in PHP 4.0.5
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