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Editorial Team
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Asked: 2026-05-16T12:44:04+00:00

PROBLEM When using Imagick::newPseudoImage to create a radial gradient, this error appears in the

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PROBLEM
When using Imagick::newPseudoImage to create a radial gradient, this error appears in the Apache HTTP error log and the radial gradient is not created:

PHP Fatal error: Uncaught exception
‘ImagickException’ with message
‘Unable to create new pseudo image:
radial-gradient:#FF0000-#FFFFFF’ in
/var/www/html/energy/scripts/rg.php:6\nStack
trace:\n#0
/var/www/html/energy/scripts/rg.php(6):
Imagick->newpseudoimage(150,150,
‘radial-gradient…’)\n#1 {main}\n
thrown in
/var/www/html/energy/scripts/rg.php on
line 6

RESEARCH
The PHP documentation for Imagick::newPseudoImage is lacking but according to link text (search for “radial”):

RADIAL_GRADIENT…Gradual radial
passing from one shade to
another…Returns a rendered radial
gradient image using the specified
image size. Specify the desired
shading as part of the filename (e.g.
radial-gradient:red-blue or
radial-gradient:#F00-#00F).

I’ve tried using “RADIAL_GRADIENT” instead of “radial-gradient” and every other combination I could think of. Utimately, I would like to feed Imagick::newPseudoImage RGB values instead of hex and save the created images to disk.

My PHP script

// Create a new imagick object.
$image = new Imagick();

// A new image with radial gradient fading from red to white, 150 by 150 pixels.
$image->newPseudoImage(150,150,’radial-gradient:#FF0000-#FFFFFF’);

// Set the image format to PNG.
$image->setImageFormat(‘png’);

// Output the image.
header(“Content-Type: image/png”);
echo $image;

My Environment
imagick 3.0.1RC1
ImageMagick 6.2.8.0
PHP 5.2.14
RedHat Enterprise Linux 5.5

Thank you 🙂

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1 Answer

  1. Editorial Team

    You are using ImageMagick 6.2.8; the latest is 6.6.3. There have been a lot of enhancements between those two versions. The documentation page you reference describes the latest version (as far as I know).

    Their download page has RPMs for installing the latest version on CentOS 5.4 (which is essentially identical to RedHat Enterprise Linux 5.4). These may well work on 5.5 as well – give them a try 🙂

    (I don’t know much about the PHP bindings, so can’t help you with that I’m afraid 🙂

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