get image size from binary data

[Christoph Burschka]

Is there some way to get the dimensions of an image, given the binary
data of the image, without having to write it to a temporary file?

It seems that getimagesize() will only take a filename, but since I have
to download the image from a remote URL with fsockopen(), I have it
stored as a binary string.

I've had a cursory glance at the data, but predictably the size is not
stored in decimal format anywhere...

--
cb

[james.gauth]

On 26 Jun, 08:31, Christoph Burschka <christoph.bursc...@rwth-
aachen.dewrote:

Is there some way to get the dimensions of an image, given the binary
data of the image, without having to write it to a temporary file?

It seems that getimagesize() will only take a filename, but since I have
to download the image from a remote URL with fsockopen(), I have it
stored as a binary string.

I've had a cursory glance at the data, but predictably the size is not
stored in decimal format anywhere...

--
cb

If the image format is supported by your GD Library, you can use the
following:

<?php

$binary_data = file_get_contents('http://www.google.co.uk/intl/en_uk/
images/logo.gif');

$im = imagecreatefromstring($binary_data);

$width = imagesx($im);
$height = imagesy($im);

print "width: $width\n";
print "height: $height\n";

?>

[Armand Brahaj]

ja*********@googlemail.com wrote:

On 26 Jun, 08:31, Christoph Burschka <christoph.bursc...@rwth-
aachen.dewrote:

>Is there some way to get the dimensions of an image, given the binary
data of the image, without having to write it to a temporary file?

It seems that getimagesize() will only take a filename, but since I have
to download the image from a remote URL with fsockopen(), I have it
stored as a binary string.

I've had a cursory glance at the data, but predictably the size is not
stored in decimal format anywhere...

--
cb

If the image format is supported by your GD Library, you can use the
following:

<?php

$binary_data = file_get_contents('http://www.google.co.uk/intl/en_uk/
images/logo.gif');

$im = imagecreatefromstring($binary_data);

$width = imagesx($im);
$height = imagesy($im);

print "width: $width\n";
print "height: $height\n";

?>

Someone correct me if I am wrong, but whenever you open an image/file to
read (even if you want to read the headers) you are storing it to some
temporary buffer/space on your machine!
Maybe the GD solution above is the best!

Armand

[Christoph Burschka]

Armand Brahaj wrote:

ja*********@googlemail.com wrote:

>On 26 Jun, 08:31, Christoph Burschka <christoph.bursc...@rwth-
aachen.dewrote:

>>Is there some way to get the dimensions of an image, given the binary
data of the image, without having to write it to a temporary file?

It seems that getimagesize() will only take a filename, but since I have
to download the image from a remote URL with fsockopen(), I have it
stored as a binary string.

I've had a cursory glance at the data, but predictably the size is not
stored in decimal format anywhere...

--
cb

If the image format is supported by your GD Library, you can use the
following:

<?php

$binary_data = file_get_contents('http://www.google.co.uk/intl/en_uk/
images/logo.gif');

$im = imagecreatefromstring($binary_data);

$width = imagesx($im);
$height = imagesy($im);

print "width: $width\n";
print "height: $height\n";

?>

Someone correct me if I am wrong, but whenever you open an image/file to
read (even if you want to read the headers) you are storing it to some
temporary buffer/space on your machine!
Maybe the GD solution above is the best!

Armand

Yeah, so I'd be downloading the image data, saving it to a temporary
file, reading the temp file into the buffer and getting the header. Not
exactly efficient.

Thanks for imagecreatefromstring(); that was exactly the function I was
looking for!

--
cb